Angular dependence of spin torque critical currents for CPP-GMR read heads
This paper employs (analytical) micromagnetic modeling to derive expressions for the critical current at the onset of spin-transfer-torque (STT) instability in CPP-GMR read heads, as a function of the relative angle between the free and reference layer magnetizations, including a general angular dep...
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| Veröffentlicht in: | IEEE transactions on magnetics 2005-10, Vol.41 (10), p.2935-2940 |
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| container_end_page | 2940 |
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| container_issue | 10 |
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| container_title | IEEE transactions on magnetics |
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| creator | Smith, N. Katine, J.A. Childress, J.R. Carey, M.J. |
| description | This paper employs (analytical) micromagnetic modeling to derive expressions for the critical current at the onset of spin-transfer-torque (STT) instability in CPP-GMR read heads, as a function of the relative angle between the free and reference layer magnetizations, including a general angular dependent STT coefficient. Experimental measurement of the angular dependence of the critical currents are made on 50-nm-sized CPP-GMR devices with synthetic antiferromagnet pinned layers, and fabricated using e-beam lithography. The results are consistent with prior theoretical models, but indicate perhaps unanticipated implications for read head operation. |
| doi_str_mv | 10.1109/TMAG.2005.855314 |
| format | Article |
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Experimental measurement of the angular dependence of the critical currents are made on 50-nm-sized CPP-GMR devices with synthetic antiferromagnet pinned layers, and fabricated using e-beam lithography. The results are consistent with prior theoretical models, but indicate perhaps unanticipated implications for read head operation.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2005.855314</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Antiferromagnetic materials ; Critical current ; Cross-disciplinary physics: materials science; rheology ; Current measurement ; Current perpendicular-to-plane (CPP) ; Electrons ; Equations ; Exact sciences and technology ; Giant magnetoresistance ; giant magnetoresistance (GMR) ; Magnetic films ; Magnetic heads ; Materials science ; Other topics in materials science ; Physics ; read head ; Saturation magnetization ; spin-torque ; Torque</subject><ispartof>IEEE transactions on magnetics, 2005-10, Vol.41 (10), p.2935-2940</ispartof><rights>2006 INIST-CNRS</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c324t-63a5d5c3f6389425a28044fb4a29a5ae292fbc015506cb758186059bf5d8ef03</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/1519166$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,792,23911,23912,25120,27903,27904,54736</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/1519166$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17230931$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Smith, N.</creatorcontrib><creatorcontrib>Katine, J.A.</creatorcontrib><creatorcontrib>Childress, J.R.</creatorcontrib><creatorcontrib>Carey, M.J.</creatorcontrib><title>Angular dependence of spin torque critical currents for CPP-GMR read heads</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>This paper employs (analytical) micromagnetic modeling to derive expressions for the critical current at the onset of spin-transfer-torque (STT) instability in CPP-GMR read heads, as a function of the relative angle between the free and reference layer magnetizations, including a general angular dependent STT coefficient. Experimental measurement of the angular dependence of the critical currents are made on 50-nm-sized CPP-GMR devices with synthetic antiferromagnet pinned layers, and fabricated using e-beam lithography. The results are consistent with prior theoretical models, but indicate perhaps unanticipated implications for read head operation.</description><subject>Antiferromagnetic materials</subject><subject>Critical current</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Current measurement</subject><subject>Current perpendicular-to-plane (CPP)</subject><subject>Electrons</subject><subject>Equations</subject><subject>Exact sciences and technology</subject><subject>Giant magnetoresistance</subject><subject>giant magnetoresistance (GMR)</subject><subject>Magnetic films</subject><subject>Magnetic heads</subject><subject>Materials science</subject><subject>Other topics in materials science</subject><subject>Physics</subject><subject>read head</subject><subject>Saturation magnetization</subject><subject>spin-torque</subject><subject>Torque</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpFkM1Lw0AQxRdRsFbvgpe96C119rPZYylalRaL9B42m1mNpEncTQ7-9yZE6GWGYd57zPwIuWWwYAzM42G32iw4gFqkSgkmz8iMGckSAG3OyQyApYmRWl6Sqxi_h1EqBjPytqo_-8oGWmCLdYG1Q9p4Gtuypl0TfnqkLpRd6WxFXR8C1l2kvgl0vd8nm90HDWgL-jWUeE0uvK0i3vz3OTk8Px3WL8n2ffO6Xm0TJ7jsEi2sKpQTXovUSK4sT0FKn0vLjVUWueE-d8CUAu3ypUpZqkGZ3KsiRQ9iTh6m2DY0w3mxy45ldFhVtsamj9kYB0aJQQiT0IUmxoA-a0N5tOE3Y5CNzLKRWTYyyyZmg-X-P9vG4WMfbO3KePItuQAj2KC7m3QlIp7WihmmtfgDr_lzaw</recordid><startdate>20051001</startdate><enddate>20051001</enddate><creator>Smith, N.</creator><creator>Katine, J.A.</creator><creator>Childress, J.R.</creator><creator>Carey, M.J.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20051001</creationdate><title>Angular dependence of spin torque critical currents for CPP-GMR read heads</title><author>Smith, N. ; Katine, J.A. ; Childress, J.R. ; Carey, M.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c324t-63a5d5c3f6389425a28044fb4a29a5ae292fbc015506cb758186059bf5d8ef03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Antiferromagnetic materials</topic><topic>Critical current</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Current measurement</topic><topic>Current perpendicular-to-plane (CPP)</topic><topic>Electrons</topic><topic>Equations</topic><topic>Exact sciences and technology</topic><topic>Giant magnetoresistance</topic><topic>giant magnetoresistance (GMR)</topic><topic>Magnetic films</topic><topic>Magnetic heads</topic><topic>Materials science</topic><topic>Other topics in materials science</topic><topic>Physics</topic><topic>read head</topic><topic>Saturation magnetization</topic><topic>spin-torque</topic><topic>Torque</topic><toplevel>online_resources</toplevel><creatorcontrib>Smith, N.</creatorcontrib><creatorcontrib>Katine, J.A.</creatorcontrib><creatorcontrib>Childress, J.R.</creatorcontrib><creatorcontrib>Carey, M.J.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity 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>Smith, N.</au><au>Katine, J.A.</au><au>Childress, J.R.</au><au>Carey, M.J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Angular dependence of spin torque critical currents for CPP-GMR read heads</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>2005-10-01</date><risdate>2005</risdate><volume>41</volume><issue>10</issue><spage>2935</spage><epage>2940</epage><pages>2935-2940</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>This paper employs (analytical) micromagnetic modeling to derive expressions for the critical current at the onset of spin-transfer-torque (STT) instability in CPP-GMR read heads, as a function of the relative angle between the free and reference layer magnetizations, including a general angular dependent STT coefficient. Experimental measurement of the angular dependence of the critical currents are made on 50-nm-sized CPP-GMR devices with synthetic antiferromagnet pinned layers, and fabricated using e-beam lithography. The results are consistent with prior theoretical models, but indicate perhaps unanticipated implications for read head operation.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2005.855314</doi><tpages>6</tpages></addata></record> |
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| identifier | ISSN: 0018-9464 |
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| subjects | Antiferromagnetic materials Critical current Cross-disciplinary physics: materials science rheology Current measurement Current perpendicular-to-plane (CPP) Electrons Equations Exact sciences and technology Giant magnetoresistance giant magnetoresistance (GMR) Magnetic films Magnetic heads Materials science Other topics in materials science Physics read head Saturation magnetization spin-torque Torque |
| title | Angular dependence of spin torque critical currents for CPP-GMR read heads |
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