Academic literature on the topic 'Crystal field energy'

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Journal articles on the topic "Crystal field energy"

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Brik, M. G., and A. A. Chaykin. "Comparative crystal field study of Ni2+ energy levels and crystal field effects in CsCdBr3 and CsMgBr3 crystals." Journal of Luminescence 145 (January 2014): 563–68. http://dx.doi.org/10.1016/j.jlumin.2013.08.037.

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Ryu, Sun Young, In Hwan Oh, Sang Jin Cho, Shin Ae Kim, and Hyun Kyu Song. "Enhancing Protein Crystallization under a Magnetic Field." Crystals 10, no. 9 (2020): 821. http://dx.doi.org/10.3390/cryst10090821.

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High-quality crystals are essential to ensure high-resolution structural information. Protein crystals are controlled by many factors, such as pH, temperature, and the ion concentration of crystalline solutions. We previously reported the development of a device dedicated to protein crystallization. In the current study, we have further modified and improved our device. Exposure to external magnetic field leads to alignment of the crystal toward a preferred direction depending on the magnetization energy. Each material has different magnetic susceptibilities depending on the individual directi
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Su, Ping, and Wen-Chen Zheng. "Crystal field energy levels of the laser crystal Gd3Ga5O12: Nd3+." Optik 123, no. 22 (2012): 2025–27. http://dx.doi.org/10.1016/j.ijleo.2011.09.038.

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BRIK, M. G. "ON THE CRYSTAL FIELD ANALYSIS OFCr4+ENERGY LEVELS INRb2CrF6." Modern Physics Letters B 20, no. 17 (2006): 1007–14. http://dx.doi.org/10.1142/s0217984906011712.

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Optical absorption spectrum of Cr4+ion in Rb2CrF6is analyzed using the exchange charge model of crystal field theory. The crystal field parameters acting on the optical electrons of Cr4+are calculated using the crystal structure data; a good agreement between the calculated and observed energy levels of Cr4+in the title host is demonstrated. The crystal field strength Dq=2159 cm-1and Racah parameters B=639 cm-1, C=3605 cm-1were evaluated from the experimental spectrum.
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Muñoz-Santiuste, J. E., A. Lorenzo, L. E. Bausá, and J. García Solé. "Crystal field and energy levels of centres in." Journal of Physics: Condensed Matter 10, no. 34 (1998): 7653–64. http://dx.doi.org/10.1088/0953-8984/10/34/018.

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Day, Graeme. "Insight from energy surfaces: structure prediction by lattice energy exploration." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C28. http://dx.doi.org/10.1107/s2053273314099719.

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A long-standing challenge for the application of computational chemistry in the field of crystallography is the prediction of crystal packing, given no more than the chemical bonding of the molecules being crystallised. Recent years have seen significant progress towards reliable crystal structure prediction methods, even for traditionally challenging systems involving flexible molecules and multi-component solids [1]. These methods are based on global searches of the lattice energy surface: a search is performed to locate all possible packing arrangements, and these structures are ranked by t
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Diao, Xin-Feng, Li-Ke Gao, Yu Xie, Tian-Yu Tang, and Yan-Lin Tang. "Ferromagnetic and Antiferromagnetic Properties of Perovskite Solar Cell Materials." Journal of Nanoelectronics and Optoelectronics 16, no. 3 (2021): 434–43. http://dx.doi.org/10.1166/jno.2021.2943.

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This paper provides an intriguing electronic and magnetic properties of the Perovskite solar cell materials (MAPbI3, CsGeI3) which are analyzed by using density functional theory, where MAPbI3 is the abbreviation of CH3NH3PbI3. Herein, we mainly discuss the influence of ferromagnetism and antiferromagnetism on the crystal structure, band gap and electronic density of states of perovskite (MAPbI3) (CsGeI3). The magmom values of the applied magnetic field are from −6 μB to 6 μB, respectively (The negative sign here represents the opposite direction of the original magnetic field). The lattice pa
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Elking, Dennis M., Laszlo Fusti-Molnar, and Anthony Nichols. "Crystal structure prediction of rigid molecules." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 72, no. 4 (2016): 488–501. http://dx.doi.org/10.1107/s2052520616010118.

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A non-polarizable force field based on atomic multipoles fit to reproduce experimental crystal properties andab initiogas-phase dimers is described. The Ewald method is used to calculate both long-range electrostatic and 1/r6dispersion energies of crystals. The dispersion energy of a crystal calculated by a cutoff method is shown to converge slowly to the exact Ewald result. A method for constraining space-group symmetry during unit-cell optimization is derived. Results for locally optimizing 4427 unit cells including volume, cell parameters, unit-cell r.m.s.d. and CPU timings are given for bo
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Nakamura, Satoshi, Keiichirou Shinohara, Nobuo Kieda, and Kimihiro Yamashita. "Polarization Energy Effect of Electrovector Hydroxyapatite on Bonelike Crystal Growth in SBF." Key Engineering Materials 309-311 (May 2006): 145–48. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.145.

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An electrovector effect of the polarized hydroxyapatite (HA) on crystal growth in a simulated body fluid was clarified to discuss the role of the polarization energy in the effect. The polarization of the HA carried out in high dc field at 300-600°C was confirmed by thermally stimulated depolarization current measurements. The dependence of the thickness of the crystal grown layer on the induced charge was remarkably indicated in the modification of the growth rates. The growth rate under an optimum polarization condition was estimated to be almost 3 times of that by the biomimetic method. At
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Zhong, Z., M. Hasnah, A. Broadbent, E. Dooryhee, and M. Lucas. "Phase-space matching between bent Laue and flat Bragg crystals." Journal of Synchrotron Radiation 26, no. 6 (2019): 1917–23. http://dx.doi.org/10.1107/s1600577519010774.

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Through phase-space analysis of Dumond diagrams for a flat Bragg crystal, a single bent Laue crystal and a monochromator consisting of double-bent Laue crystals, this work shows that it is possible to match the flat Bragg crystal to both the single-crystal and double-crystal Laue monochromators. The matched system has the advantage that the phase space of the bent crystal's output beam is much larger than that of the flat crystal, making the combined system stable. Here it is suggested that such a matched system can be used at synchrotron facilities to realize X-ray dark-field imaging, analyze
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Dissertations / Theses on the topic "Crystal field energy"

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Kabro, Pierre. "Optical spectroscopy, crystal field analysis, upconversion and energy transfer studies of Er³§+ doped yttrium vanadate single crystals." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25909.pdf.

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Berry, Andrew John. "Optical spectroscopy of terbium elpasolites." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320164.

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蔡慶銘 and Hing-ming Michael Chua. "Transition intensities and energy transfer of lanthanide ions in crystals." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31211409.

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Chua, Hing-ming Michael. "Transition intensities and energy transfer of lanthanide ions in crystals /." [Hong Kong : University of Hong Kong], 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13692689.

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Crispin, Katherine L. "Cation Diffusion in Periclase." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1309455282.

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Chan, Hin Chung Stephen. "Polymorph prediction of organic (co-) crystal structures from a thermodynamic perspective." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5530.

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A molecule can crystallise in more than one crystal structure, a common phenomenon in organic compounds known as polymorphism. Different polymorphic forms may have significantly different physical properties, and a reliable prediction would be beneficial to the pharmaceutical industry. However, crystal structure prediction (CSP) based on the knowledge of the chemical structure had long been considered impossible. Previous failures of some CSP attempts led to speculation that the thermodynamic calculations in CSP methodologies failed to predict the kinetically favoured structures. Similarly, re
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Bright, Trevor James. "Infrared properties of dielectric thin films and near-field radiation for energy conversion." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50364.

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Studies of the radiative properties of thin films and near-field radiation transfer in layered structures are important for applications in energy, near-field imaging, coherent thermal emission, and aerospace thermal management. A comprehensive study is performed on the optical constants of dielectric tantalum pentoxide (Ta₂O₅) and hafnium oxide (HfO₂) thin films from visible to the far infrared using spectroscopic methods. These materials have broad applications in metallo-dielectric multilayers, anti-reflection coatings, and coherent emitters based on photonic crystal structures, especially
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Svärd, Michael. "Crystal Polymorphism of Substituted Monocyclic Aromatics." Licentiate thesis, KTH, Chemical Engineering and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10501.

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Cao, Kanyu. "Crystal-field splitting of Er 3+in ZnO and experimental observations." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177608455.

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Svärd, Michael. "Structural, Kinetic and Thermodynamic Aspects of the Crystal Polymorphism of Substituted Monocyclic Aromatic Compounds." Doctoral thesis, KTH, Teknisk strömningslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33836.

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This work concerns the interrelationship between thermodynamic, kinetic and structural aspects of crystal polymorphism. It is both experimental and theoretical, and limited with respect to compounds to substituted monocyclic aromatics. Two polymorphs of the compound m-aminobenzoic acid have been experimentally isolated and characterized by ATR-FTIR spectroscopy, X-ray powder diffraction and optical microscopy. In addition, two polymorphs of the compound m-hydroxybenzoic acid have been isolated and characterized by ATR-FTIR spectroscopy, high-temperature XRPD, confocal Raman, hot-stage and scan
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Books on the topic "Crystal field energy"

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Jonathan, Pawlik, ed. The Newcastle guide to healing with crystals: Balancing the human energy field for physical and spiritual well-being. Newcastle Pub. Co., 1988.

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Chase, Pamela. The Newcastle guide to healing with crystals: Balancing the human energy field for physical and spiritual well-being. Borgo Press, 1989.

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Rainey, Amber. Crystal Healing: How Crystal Healing Works, Crystal Therapy, the Human Energy Field, Gemstones, and How to Use Crystals for Healing and Increased Energy! Ingram Publishing, 2020.

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Crystal Healing: How crystal healing works, crystal therapy, the human energy field, gemstones, and how to use crystals for healing and increased energy! CreateSpace Independent Publishing Platform, 2015.

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Crystal Healing: Types Of Crystals And Their Impact On Human Energy Field. Amazon Digital Services, Inc., 2015.

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J, Eggleston J., Voorhees P. W. 1955-, and National Institute of Standards and Technology (U.S.), eds. A phase-field model for high anisotropic interfacial energy. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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J, Eggleston J., Voorhees P. W. 1955-, and National Institute of Standards and Technology (U.S.), eds. A phase-field model for high anisotropic interfacial energy. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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J, Eggleston J., Voorhees P. W, and National Institute of Standards and Technology (U.S.), eds. A phase-field model for high anisotropic interfacial energy. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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A phase-field model for high anisotropic interfacial energy. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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A phase-field model for high anisotropic interfacial energy. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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Book chapters on the topic "Crystal field energy"

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Meyer, B. K. "ZnO: crystal-field splitting energy." In New Data and Updates for IV-IV, III-V, II-VI and I-VII Compounds, their Mixed Crystals and Diluted Magnetic Semiconductors. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14148-5_324.

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Chizhik, Vladimir I., Yuri S. Chernyshev, Alexey V. Donets, Vyacheslav V. Frolov, Andrei V. Komolkin, and Marina G. Shelyapina. "Energy Levels of Paramagnetic Center in Crystal Field." In Magnetic Resonance and Its Applications. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05299-1_11.

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Montagnani, Giovanni Ludovico. "Development of a 3” LaBr3 SiPM-Based Detection Module for High Resolution Gamma Ray Spectroscopy and Imaging." In Special Topics in Information Technology. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62476-7_7.

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AbstractGamma radiation detection finds many applications in different fields, including astrophysics, nuclear physics and medical diagnostics. Nowadays large Lanthanum Bromide crystals coupled to Photomultiplier Tubes (PMTs) represent the state of the art for gamma detection modules, in particular for spectroscopic measurements. Nevertheless, there is an interest in substituting photomultiplier tubes with solid state photodetectors like Silicon Photomultipliers (SiPMs), owing to the latter’s significant advantages. These include insensitivity to magnetic fields, low bias voltage, compactness, fast response and mechanical robustness. The aim of this thesis work, which was carried out within the context of the GAMMA project supported by IstitutoNazionale di FisicaNucleare (INFN), is the design, development and experimental characterization of a -ray spectrometer based on large Lanthanum Bromide scintillator crystals coupled with Silicon Photomultipliers. This detector specifications are compliant with nuclear physics experiments with energies ranging from 100 keV to 20 MeV, characterized by state-of-the-art energy resolution and imaging capability, in a compact, modular and robust structure. In order to perform the readout of large scintillator crystals, a matrix of 144 Silicon Photomultipliers was designed using NUV-HD SiPMs from Fondazione Bruno Kessler (FBK). These were chosen due to their high Photon Detection Efficiency in correspondence with the peak emission wavelength of the crystal, the high cell density and low Dark Count Rate.
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"Energy level diagrams and crystal field spectra of transition metal ions." In Mineralogical Applications of Crystal Field Theory. Cambridge University Press, 1993. http://dx.doi.org/10.1017/cbo9780511524899.005.

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"Energy levels of ions in crystals." In Crystal-Field Engineering of Solid-State Laser Materials. Cambridge University Press, 2000. http://dx.doi.org/10.1017/cbo9780511524165.005.

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"Energy transfer and excited state absorption." In Crystal-Field Engineering of Solid-State Laser Materials. Cambridge University Press, 2000. http://dx.doi.org/10.1017/cbo9780511524165.008.

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Sutton, Adrian P. "Dislocations." In Physics of Elasticity and Crystal Defects. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198860785.003.0006.

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Plastic deformation involves planes of atoms sliding over each other. The sliding happens through the movement of linear defects called dislocations. The phenomenology of dislocations and their characterisation by the Burgers circuit and line direction are described. The Green’s function plays a central role in Volterra’s formula for the displacement field of a dislocation and Mura’s formula for the strain and stress fields. The isotropic elastic fields of edge and screw dislocations are derived. The field of an infinitesimal dislocation loop and its dipole tensor are also derived. The elastic energy of interaction between a dislocation and another source of stress is derived, and leads to force on a dislocation. The elastic energy of a dislocation and the Frank-Read source of dislocations are also discussed. Problem set 6 extends the content of the chapter in several directions including grain boundaries and faults.
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Sutton, Adrian P. "The force on a defect." In Physics of Elasticity and Crystal Defects. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198860785.003.0008.

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This chapter is based on Eshelby’s static energy-momentum tensor which results in an integral expression for the configurational force on a defect. After elucidating the concepts of a configurational force and an elastic singularity the mechanical pressure on an interface, such as a twin boundary or a martensitic interface, is derived. Eshelby’s force on a defect is derived using both physical arguments and more formally using classical field theory. It is equivalent to the J-integral in fracture mechanics. The Peach–Koehler force on a dislocation is rederived using the static energy-momentum tensor. An expression for an image force is derived, where a defect interacts with a free surface.
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Newnham, Robert E. "Ferroic crystals." In Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0018.

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Twinned crystals are normally classified according to twin-laws and morphology, or according to their mode of origin, or according to a structural basis, but there is another classification that deserves wider acceptance, one that is based on the tensor properties of the orientation states. An advantage of such a classification is the logical relationship between free energy and twin structures, for it becomes immediately apparent which forces and fields will be effective in moving twin walls. The domain patterns in ferroelectric and ferromagnetic materials are strongly affected by external fields, but there are many other types of twinned crystals with movable twin walls and hysteresis. These materials are classified as ferroelastic, ferrobielastic, and various other ferroic species. As explained in the next section, each type of switching arises from a particular term in the free energy function. Ferroic crystals possess two or more orientation states or domains, and under a suitably chosen driving force the domain walls move, switching the crystal from one domain state to another. Switching may be accomplished by mechanical stress (X), electric field (E), magnetic field (H), or some combination of the three. Ferroelectric, ferroelastic, and ferromagnetic materials are well known examples of primary ferroic crystals in which the orientation states differ in spontaneous polarization (P(s)), spontaneous strain (x(s)), and spontaneous magnetization (I(s)), respectively. It is not necessary, however, that the orientation states differ in the primary quantities (strain, polarization, or magnetization) for the appropriate field to develop a driving force for domain walls. If, for example, the twinning rules between domains lead to a different orientation of the elastic compliance tensor, a suitably chosen stress can then produce different strains in the two domains. This same stress may act upon the difference in induced strain to produce wall motion and domain reorientation. Aizu suggested the term ferrobielastic to distinguish this type of response from ferroelasticity, and illustrated the effect with Dauphine twinning in quartz. Other types of secondary ferroic crystals are listed in Table 16.1, along with the difference between domain states, and the driving fields required to switch between states.
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Mazurak, Z., J. B. Gruber, C. A. Morrison, and S. Maia-Melo. "OPTICAL SPECTRA, ENERGY LEVELS AND CRYSTAL-FIELD ANALYSIS OF Pr3+, Nd3+, Er3+ IN Li, K LnP4O12 CRYSTALS." In New Frontiers in Rare Earth Science and Applications. Elsevier, 1985. http://dx.doi.org/10.1016/b978-0-12-767661-6.50086-2.

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Conference papers on the topic "Crystal field energy"

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Munakata, Tetsuo, and Satoshi Someya. "Numerical Study on the CZ Silicon Melt Convection for High Efficient Solar Cell." In ASME 2003 International Solar Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/isec2003-44222.

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Conversion efficiency of solar cell is strongly affected by quality of substrate and the quality of substrate is influenced by melt convection if the substrate crystal is grown by melt growth technique. Therefore, melt convection control techniques are important to produce a high quality single crystal. In this paper, we have proposed a high frequency magnetic field applied CZ method and investigated the effect of high frequency magnetic field on silicon melt convection. The result reveals that the high frequency magnetic fields affect the tendency of the melt convection: until certain intensi
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Dovhyj, Ya, and I. Man'kovska. "Influence of the low-symmetry crystal field on the energy states of CuO crystals." In 2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE). IEEE, 2012. http://dx.doi.org/10.1109/omee.2012.6464814.

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Ye, Wenjiang, Zhidong Zhang, Hongyu Xing, Guochen Yang, and Guoying Chen. "Electric-field-induced effective anchoring energy in nematic liquid crystal." In 2010 International Conference on Display and Photonics, edited by Yanwen Wu. SPIE, 2010. http://dx.doi.org/10.1117/12.869375.

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Sun, Qiang, Hu Sheng, Guitao Chen, and Junpeng Ji. "Research on the Cusp Electromagnetic Field in Single Crystal Furnace." In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748925.

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Petkova, P., E. L. Andreici, and N. M. Avram. "Crystal field parameters and energy levels scheme of trivalent chromium doped BSO." In TIM 2013 PHYSICS CONFERENCE. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4903025.

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Wang, Hongbo, and William S. Oates. "A Phase Field Model of Photo-Induced Trans-Cis-Trans Bending of Liquid Crystal Elastomer Films." In ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3657.

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A new class of glassy liquid crystal elastomers are studied to understand their light-coupled deformation characteristics. In particular, the photomechanics of azobenzene liquid crystal elastomers is modeled using a nonlinear continuum mechanics approach coupled with time-dependent liquid crystal domain structure evolution to understand light polarization effects on deformation. Light propagation and absorption within the elastomer is modeled using Maxwell’s electro-magnetic equations. By consideration of electric energy due to light absorption, light-induced electrical stresses are introduced
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Shunkeyev, Kuanyshbek, Lyudmila Myasnikova, Aida Maratova, and Karlygash Bizhanova. "Mechanisms of Radiation Defect Formation in the KI Crystal in the Deformation Field." In 2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE). IEEE, 2020. http://dx.doi.org/10.1109/efre47760.2020.9242132.

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Ni, Xiao-Jing, and Min Huang. "Faraday Effect Optical Current/Magnetic Field Sensors Based on Cerium-Substituted Yttrium Iron Garnet Single Crystal." In 2010 Asia-Pacific Power and Energy Engineering Conference. IEEE, 2010. http://dx.doi.org/10.1109/appeec.2010.5448944.

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Huang, Min, and Li Ling. "Faraday Rotation and Sensitivity of Bi-Substituted Iron Garnet Single Crystal for Optical Current/Magnetic Field Sensors." In 2009 Asia-Pacific Power and Energy Engineering Conference. IEEE, 2009. http://dx.doi.org/10.1109/appeec.2009.4918369.

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Monteil, A., C. Garapon, and G. Boulon. "Cr3+ to Nd3+ energy transfer in substituted GGG in relation to the crystal field distribution." In ADVANCES IN LASER SCIENCE−IV. AIP, 1989. http://dx.doi.org/10.1063/1.38568.

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