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Relevant bibliographies by topics / Magnetic recording heads / Dissertations / Theses

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Dissertations / Theses on the topic 'Magnetic recording heads'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Shute, Hazel Anne. "Mathematical analysis of novel magnetic recording heads." Thesis, University of Plymouth, 1995. http://hdl.handle.net/10026.1/2392.

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As a contribution to increasing the areal density of digital data stored on a magnetic recording medium, this thesis provides mathematical analyses of various magnetic recording heads. Each of the heads considered here is for use in a perpendicular recording system, writing to or reading from a multi-layer medium which includes a high magnetic permeability layer between the data storage layer and the substrate. The exact two-dimensional analysis is performed in each case by one of two methods: either Fourier analysis or conformal mapping. The types of heads analysed include conventional styles

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2

Harrison, Matthew J. K. "The tribology of laminated magnetic recording heads." Thesis, Aston University, 1999. http://publications.aston.ac.uk/7990/.

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This thesis investigates the mechanisms that lead to pole tip recession (PTR) in laminated magnetic recording heads (also known as "sandwich heads"). These heads provide a platform for the utilisation of advanced soft magnetic thin films in practical recording heads suitable for high frequency helical scan tape recording systems. PTR results from a differential wear of the magnetic pole piece from the tape-bearing surface of the head. It results in a spacing loss of the playback or read signal of 54.6dB per recording wavelength separation of the poles from the tape. PTR depends on the material

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3

Recio, Gustavo. "High speed switching in magnetic recording thin-film heads." Thesis, University of Exeter, 2008. http://hdl.handle.net/10036/41479.

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There has always been an increasing demand for high density data storage. However, the increased areal storage densities of hard disk drives require a level of miniturisation of the recording heads where the micromagnetic details and switching mechanisms can no longer be ignored. Furthermore, theoretical and numerical studies on thin-film recording heads tend to separate the micromagnetics from the electromagnetic aspects of the head during switching and hence ignore the lossy nature of head materials. This project was aimed to develop a numerical simulation approach that simultaneously incorp

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4

Edress, Mohamed Ammar Isam. "Theory of symmetry and asymmetry in two-dimensional magnetic recording heads." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/22566.

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As part of the natural evolution and continued optimisation of their designs, current and future magnetic recording heads, used and proposed in technologies such as perpendicular recording, shingled magnetic recording and two-dimensional magnetic recording, often exhibit asymmetry in their structure. They consist of two semi-infinite poles separated by a gap (where the recording field is produced), with an inner gap faces inclined at an angle. Modelling of the fields from asymmetrical structures is complex, and no explicit solutions are currently available (only implicit conformal mapping solu

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5

Patton, Steven T. "Tribology of advanced magnetic tapes and heads for ultrahigh-density magnetic recording /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487950658545809.

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6

Wang, Frank Zhigang. "Advanced magnetic thin-film heads under read-while-write operation." Thesis, University of Plymouth, 1999. http://hdl.handle.net/10026.1/2353.

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A Read-While-Write (RWW) operation for tape and/or potentially disk applications is needed in the following three cases: 1. High reliability; 2. Data servo systems; 3. Buried servo systems. All these applications mean that the read (servo) head and write head are operative simultaneously. Consequently, RWW operation will require work to suppress the so-called crossfeed field radiation from the write head. Traditionally, write-read crossfeed has been reduced in conventional magnetic recording heads by a variety of screening methods, but the effectness of these methods is very limited. On the ot

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7

Munro, Tommy. "The study of stray magnetic fields from digital recording heads for tape applications." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395108.

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8

Craig, Beverley R. "Magnetic and physical characterisation of soft thin films for use in perpendicular recording heads." Thesis, University of Glasgow, 2006. http://theses.gla.ac.uk/4011/.

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The increasing demand for greater storage densities poses constant challenges for the magnetic recording industry. The move to perpendicular recording occurred recently as this provides oneÃ‚Â·way of increasing the storage density. For further advance in the techriology it is important to gain an understanding of the micromagnetic and microstructural propertiesof the materials used in the hard drive. The material used in the write head is extremely important as the storage density is increased. CoFe alloys are currently of interest as they have a high magnetic moment and therefore have the pot

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9

Lamberton, Robert William. "A study of the microstructure and growth of ultra-thin film amorphous hydrogenated carbon (a-C:H) prepared by plasma enhanced chemical vapour deposition (PECVD)." Thesis, University of Ulster, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264694.

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10

Fievre, Michaël. "Conception et validation technologique de têtes intégrées d’écriture multipistes pour l’enregistrement hélicoïdal sur bande." Grenoble INPG, 2002. http://www.theses.fr/2002INPG0167.

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Les techniques de stockage de l’information ont connu un essor important avec l’avènement de l’informatique et de toutes les activités multimédia. L’enregistrement hélicoïdal sur bande, qui reste le média le plus économique est destiné à stocker de très importants volumes d’information. Le nombre de têtes d’écriture/lecture utilisées par ce type d’enregistreurs augmente pour améliorer les taux de transfert. Le problème du positionnement entre les têtes devient donc central. La technologie de fabrication des têtes pour l’enregistrement hélicoïdal proposé par la société Alditech qui est entièrem

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11

Tang, Yee Chin. "Corrosion of soft magnetic recording head alloys and the effect of magnetic fields on corrosion." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410857.

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12

Jermey, P. M. "A three-dimensional singular model of a magnetic perpendicular recording head with applications to inter-track interference." Thesis, University of Plymouth, 2008. http://hdl.handle.net/10026.1/2616.

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Two-dimensional models of the read head are not suitable for simulating the replay of the extremely high density data that is expected to be achieved in hard drives using perpendicular recording. By matching a singular function approximation to the Fourier solution at the air-bearing surface (ABS), a three-dimensional analytic model of a shielded giant magnetoresistive head, with side shields, for perpendicular replay is derived in this thesis. An explicit expression for the potential in the ABS is presented and parameters in that expression are accurately estimated for a range of practical he

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13

Fukuzawa, Kenji, 健二福澤, Takuro Muramatsu, Hiroaki Amakawa, Shintaro Itoh, and Hedong Zhang. "Nonuniform Distribution of Molecularly Thin Lubricant Caused by Inhomogeneous Buried Layers of Discrete Track Media." IEEE, 2008. http://hdl.handle.net/2237/11180.

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14

Haq, Mohammad Ashraful. "Continuum and molecular dynamics analyses of lubricant evaporation and flow due to laser heating in heat-assisted magnetic recording." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1531140850318054.

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15

Mas, Patrick. "Etude de capteurs magnétorésistifs intégrés pour l'enregistrement magnétique." Grenoble 1, 1987. http://www.theses.fr/1987GRE10130.

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L'effet de magnetoresistance dans les couches minces ferromagnetiques est applique a la realisation de capteurs de champs integres pour la lecture des milieux enregistres. On optimise la sensibilite et le comportement micromagnetique des capteurs, en mettant en evidence l'interet de l'utilisation de l'alliage nifeco. La realisation d'une tete magnetoresistive est appliquee a la lecture d'un enregistrement analogique

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16

Miroslav, Latinović. "Konvencionalni, konformalni i fuzionisani modalitet planiranja radioterapije planocelularnog karcinoma glave i vrata." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2018. https://www.cris.uns.ac.rs/record.jsf?recordId=107035&source=NDLTD&language=en.

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Uvod: Učestalost neželjenih efekata uzrokovanih zračenjem kod pacijenata sa karcinomom glave i vrata zavisi od tehnike planiranja, sprovođenja radioterapije kao i primarne lokalizacije tumora. Cilj: Osnovna uloga na&scaron;eg istraživanja je da se utvrdi učestalost neželjenih efekata tokom zračne terapije kod pacijenata sa tumorom glave i vrata tretiranih 2D konvencionalnom radioterapijom, 3D konformalnom radioterapijom planiranoj samo na osnovu CT-a nasuprot 3D konformalnoj terapiji planiranoj na osnovu fuzije kompjuterizovane tomografije sa magnetno rezontnim imidžingom (CT-MRI). Metode: Pro

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17

Nikola, Đurić. "Dekodovanje MTR kodova principom finog odlučivanja na kanalima za magnetsko memorisanje informacija." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2009. http://dx.doi.org/10.2298/NS20091120DJURIC.

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U radu su predstavljene nove tehnike dekodovanja maximumtransition run (MTR) kodova na principu finog odlučivanja.Analizirane su performanse ovih tehnika u kombinaciji saza&scaron;titnim LDPC kodom na kanalima za magnetsko memorisanjeinformacija, sa posebnim osvrtom na model kanala sadve staze za zapisivanje i dve glave za čitanje. U modelu kanalaje kori&scaron;ćena idealna E2PR4 ekvalizacija staza adekvatnaza sisteme sa visokom gustinom magnetskog zapisa.<br>This thesis presents the novel soft-decision decoding techniquesfor decoding of the maximum transition run (MTR)codes. Performances of s

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18

Materne, Alex. "Elaboration et caractérisation d'alliages amorphes ferromagnétiques doux, Co(1-x)Zr(x) et Co(1-x)(Zr, Nb)x, pour l'application aux têtes intégrées de l'enregistrement magnétique." Grenoble 1, 1987. http://www.theses.fr/1987GRE10131.

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Caracterisation de couches minces cozr et co(zr,nb) deposes par pulverisation cathodique en radio-frequences. Etude de l'anisotropie developpee aux faibles et fortes pressions de depot. Discussion relative a l'origine de ces anisotropies. Etude du controle de la direction et de l'intensite du champ d'anisotropie par application de recuits sous champ magnetique tournant suivis de recuits sous champ magnetique fixe

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19

"Amplitude thermal robustness study of GMR spin valve magnetic recording heads." 2000. http://library.cuhk.edu.hk/record=b5890369.

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Chan Lai To = 硏究巨磁阻自旋閥磁記錄頭的靈敏度與溫度之關係 / 陳麗圖.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2000.<br>Includes bibliographical references (leaves 80-83).<br>Text in English; abstracts in English and Chinese.<br>Chan Lai To = Yan jiu ju ci zu zi xuan fa ci ji lu tou de ling min du yu wen du zhi guan xi / Chen Litu.<br>Abstracts --- p.ii<br>論文摘要 --- p.iii<br>Acknowledgements --- p.iv<br>Table of Contents --- p.v<br>List of Figures --- p.viii<br>Abbreviations --- p.xi<br>Chapter Chapter 1 --- Introduction --- p.1<br>Chapter 1.1 --- History of Data Storage in Computers --- p.1<br>Chap

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20

Wei, Jiandong [Verfasser]. "Nanoscale analysis of natural and artifical magnetic objects : particles, thin films and recording heads / von Jiandong Wei." 2009. http://d-nb.info/1001100956/34.

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