Thermal decay in high density disk media
An experimental technique has been developed to accurately measure the time dependence of playback voltage due to the decay of recorded magnetization patterns. A "calibration" procedure is utilized to minimize the effect of magnetoresistive head sensitivity variations. This technique is ap...
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| Veröffentlicht in: | IEEE transactions on magnetics 1998-09, Vol.34 (5), p.3786-3793 |
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| container_title | IEEE transactions on magnetics |
| container_volume | 34 |
| creator | Yun Zhang Bertram, H.N. |
| description | An experimental technique has been developed to accurately measure the time dependence of playback voltage due to the decay of recorded magnetization patterns. A "calibration" procedure is utilized to minimize the effect of magnetoresistive head sensitivity variations. This technique is applied to a systematic study of the dependence of the signal decay on recording bit density and magnetic layer thickness in longitudinal thin film media. A Neel-Arrhenius type model is introduced to calculate the degradation of a square wave magnetization pattern subject to thermal agitation. Because the equivalent external field which reduces the energy barrier is the time and spatially varying magnetostatic field produced by magnetic transitions, an iterative procedure is utilized to obtain the time dependent magnetization. The model takes into account distributions of grain volume and anisotropy axis. The calculation results are compared with the experimental data and good agreement is obtained. |
| doi_str_mv | 10.1109/20.718543 |
| format | Article |
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A "calibration" procedure is utilized to minimize the effect of magnetoresistive head sensitivity variations. This technique is applied to a systematic study of the dependence of the signal decay on recording bit density and magnetic layer thickness in longitudinal thin film media. A Neel-Arrhenius type model is introduced to calculate the degradation of a square wave magnetization pattern subject to thermal agitation. Because the equivalent external field which reduces the energy barrier is the time and spatially varying magnetostatic field produced by magnetic transitions, an iterative procedure is utilized to obtain the time dependent magnetization. The model takes into account distributions of grain volume and anisotropy axis. The calculation results are compared with the experimental data and good agreement is obtained.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/20.718543</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Electronics ; Exact sciences and technology ; Magnetic anisotropy ; Magnetic devices ; Magnetic films ; Magnetic heads ; Magnetic recording ; Magnetization ; Magnetoresistance ; Magnetostatic waves ; Other magnetic recording and storage devices (including tapes, disks, and drums) ; Perpendicular magnetic anisotropy ; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices ; Time measurement ; Voltage</subject><ispartof>IEEE transactions on magnetics, 1998-09, Vol.34 (5), p.3786-3793</ispartof><rights>1998 INIST-CNRS</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c306t-43c7035f95a7a78c574006fee3cb82f67e609e942471c66bf0e0034f0c2d7c2d3</citedby><cites>FETCH-LOGICAL-c306t-43c7035f95a7a78c574006fee3cb82f67e609e942471c66bf0e0034f0c2d7c2d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/718543$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/718543$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2427950$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yun Zhang</creatorcontrib><creatorcontrib>Bertram, H.N.</creatorcontrib><title>Thermal decay in high density disk media</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>An experimental technique has been developed to accurately measure the time dependence of playback voltage due to the decay of recorded magnetization patterns. A "calibration" procedure is utilized to minimize the effect of magnetoresistive head sensitivity variations. This technique is applied to a systematic study of the dependence of the signal decay on recording bit density and magnetic layer thickness in longitudinal thin film media. A Neel-Arrhenius type model is introduced to calculate the degradation of a square wave magnetization pattern subject to thermal agitation. Because the equivalent external field which reduces the energy barrier is the time and spatially varying magnetostatic field produced by magnetic transitions, an iterative procedure is utilized to obtain the time dependent magnetization. The model takes into account distributions of grain volume and anisotropy axis. The calculation results are compared with the experimental data and good agreement is obtained.</description><subject>Applied sciences</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Magnetic anisotropy</subject><subject>Magnetic devices</subject><subject>Magnetic films</subject><subject>Magnetic heads</subject><subject>Magnetic recording</subject><subject>Magnetization</subject><subject>Magnetoresistance</subject><subject>Magnetostatic waves</subject><subject>Other magnetic recording and storage devices (including tapes, disks, and drums)</subject><subject>Perpendicular magnetic anisotropy</subject><subject>Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices</subject><subject>Time measurement</subject><subject>Voltage</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kL1PwzAQxS0EEqUwsDJlQAiGlPNH7HhEFV9SJZYyW65zpoYkLXY79L_HKFGH0-npfvf09Ai5pjCjFPQjg5midSX4CZlQLWgJIPUpmQDQutRCinNykdJ3lqKiMCH3yzXGzrZFg84eitAX6_C1zqpPYXcompB-ig6bYC_JmbdtwqtxT8nny_Ny_lYuPl7f50-L0nGQu1Jwp4BXXldWWVW7SomcwCNyt6qZlwolaNSCCUWdlCsPCMCFB8calYdPyd3gu42b3z2mnelCcti2tsfNPhlWSyGUkBl8GEAXNylF9GYbQ2fjwVAw_10YBmboIrO3o6lNzrY-2t6FdHxggildQcZuBiwg4vE6evwB9ydjeQ</recordid><startdate>19980901</startdate><enddate>19980901</enddate><creator>Yun Zhang</creator><creator>Bertram, H.N.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>19980901</creationdate><title>Thermal decay in high density disk media</title><author>Yun Zhang ; Bertram, H.N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c306t-43c7035f95a7a78c574006fee3cb82f67e609e942471c66bf0e0034f0c2d7c2d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Applied sciences</topic><topic>Electronics</topic><topic>Exact sciences and technology</topic><topic>Magnetic anisotropy</topic><topic>Magnetic devices</topic><topic>Magnetic films</topic><topic>Magnetic heads</topic><topic>Magnetic recording</topic><topic>Magnetization</topic><topic>Magnetoresistance</topic><topic>Magnetostatic waves</topic><topic>Other magnetic recording and storage devices (including tapes, disks, and drums)</topic><topic>Perpendicular magnetic anisotropy</topic><topic>Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices</topic><topic>Time measurement</topic><topic>Voltage</topic><toplevel>online_resources</toplevel><creatorcontrib>Yun Zhang</creatorcontrib><creatorcontrib>Bertram, H.N.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Yun Zhang</au><au>Bertram, H.N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermal decay in high density disk media</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>1998-09-01</date><risdate>1998</risdate><volume>34</volume><issue>5</issue><spage>3786</spage><epage>3793</epage><pages>3786-3793</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>An experimental technique has been developed to accurately measure the time dependence of playback voltage due to the decay of recorded magnetization patterns. A "calibration" procedure is utilized to minimize the effect of magnetoresistive head sensitivity variations. This technique is applied to a systematic study of the dependence of the signal decay on recording bit density and magnetic layer thickness in longitudinal thin film media. A Neel-Arrhenius type model is introduced to calculate the degradation of a square wave magnetization pattern subject to thermal agitation. Because the equivalent external field which reduces the energy barrier is the time and spatially varying magnetostatic field produced by magnetic transitions, an iterative procedure is utilized to obtain the time dependent magnetization. The model takes into account distributions of grain volume and anisotropy axis. The calculation results are compared with the experimental data and good agreement is obtained.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/20.718543</doi><tpages>8</tpages></addata></record> |
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| ispartof | IEEE transactions on magnetics, 1998-09, Vol.34 (5), p.3786-3793 |
| issn | 0018-9464 1941-0069 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_28644746 |
| source | IEEE Electronic Library (IEL) |
| subjects | Applied sciences Electronics Exact sciences and technology Magnetic anisotropy Magnetic devices Magnetic films Magnetic heads Magnetic recording Magnetization Magnetoresistance Magnetostatic waves Other magnetic recording and storage devices (including tapes, disks, and drums) Perpendicular magnetic anisotropy Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Time measurement Voltage |
| title | Thermal decay in high density disk media |
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