{"id":510,"date":"2018-07-26T12:26:48","date_gmt":"2018-07-26T04:26:48","guid":{"rendered":"http:\/\/labstt.phy.ncu.edu.tw\/?p=510"},"modified":"2019-01-01T18:39:40","modified_gmt":"2019-01-01T10:39:40","slug":"analytic-expression-for-the-giant-fieldlike-spin-torque-in-spin-filter-magnetic-tunnel-junctions","status":"publish","type":"post","link":"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510","title":{"rendered":"Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions"},"content":{"rendered":"We propose analytic expressions for fieldlike, T\u22a5, and spin-transfer, T\u0003, spin torque components in the spin-filter-based magnetic tunnel junction (SFMTJ), by using the single-band tight-binding model with the nonequilibrium Keldysh formalism. In consideration of multireflection processes between noncollinear magnetization of the spin-filter (SF) barrier and the ferromagnetic (FM) electrode, the central spin-selective SF barrier plays an active role in the striking discovery T\u22a5 \u0004 T\u0003, which can be further identified by the unusual barrier thickness dependence of giant T\u22a5.<!--more-->\r\n\r\n Our general expressions reveal the sinusoidal angular dependence of both spin torque components, even in the presence of the SF barrier.\r\n\r\n<a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.96.064429\">https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.96.064429<\/a>","protected":false},"excerpt":{"rendered":"We propose analytic expressions for fieldlike, T\u22a5, and spin-transfer, T\u0003, spin torque components in the spin-filter-based magnetic tunnel junction (SFMTJ), by using the single-band tight-binding model with the nonequilibrium Keldysh formalism. In consideration of multireflection processes between noncollinear magnetization of the spin-filter (SF) barrier and the ferromagnetic (FM) electrode, the central spin-selective SF barrier plays [&#8230;]<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510\">Read More&#8230;<span class=\"screen-reader-text\"> from Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[],"class_list":["post-510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newest-research"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions &#060; Theoretical and Computational Spintronics Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions &#060; Theoretical and Computational Spintronics Group\" \/>\n<meta property=\"og:description\" content=\"We propose analytic expressions for fieldlike, T\u22a5, and spin-transfer, T\u0003, spin torque components in the spin-filter-based magnetic tunnel junction (SFMTJ), by using the single-band tight-binding model with the nonequilibrium Keldysh formalism. In consideration of multireflection processes between noncollinear magnetization of the spin-filter (SF) barrier and the ferromagnetic (FM) electrode, the central spin-selective SF barrier plays [...]Read More... from Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions\" \/>\n<meta property=\"og:url\" content=\"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510\" \/>\n<meta property=\"og:site_name\" content=\"Theoretical and Computational Spintronics Group\" \/>\n<meta property=\"article:published_time\" content=\"2018-07-26T04:26:48+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-01-01T10:39:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/labstt.phy.ncu.edu.tw\/wp-content\/uploads\/2018\/07\/medium.png\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"423\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"LISE\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"LISE\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510#article\",\"isPartOf\":{\"@id\":\"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510\"},\"author\":{\"name\":\"LISE\",\"@id\":\"https:\/\/labstt.phy.ncu.edu.tw\/#\/schema\/person\/cda02180aa6bc03cc2fee84aeba5e41d\"},\"headline\":\"Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions\",\"datePublished\":\"2018-07-26T04:26:48+00:00\",\"dateModified\":\"2019-01-01T10:39:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510\"},\"wordCount\":119,\"image\":{\"@id\":\"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510#primaryimage\"},\"thumbnailUrl\":\"https:\/\/labstt.phy.ncu.edu.tw\/wp-content\/uploads\/2018\/07\/medium.png\",\"articleSection\":[\"\u6700\u65b0\u7814\u7a76\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510\",\"url\":\"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510\",\"name\":\"Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions &#060; 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In consideration of multireflection processes between noncollinear magnetization of the spin-filter (SF) barrier and the ferromagnetic (FM) electrode, the central spin-selective SF barrier plays [...]Read More... from Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions","og_url":"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510","og_site_name":"Theoretical and Computational Spintronics Group","article_published_time":"2018-07-26T04:26:48+00:00","article_modified_time":"2019-01-01T10:39:40+00:00","og_image":[{"width":500,"height":423,"url":"https:\/\/labstt.phy.ncu.edu.tw\/wp-content\/uploads\/2018\/07\/medium.png","type":"image\/png"}],"author":"LISE","twitter_card":"summary_large_image","twitter_misc":{"Written by":"LISE","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510#article","isPartOf":{"@id":"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510"},"author":{"name":"LISE","@id":"https:\/\/labstt.phy.ncu.edu.tw\/#\/schema\/person\/cda02180aa6bc03cc2fee84aeba5e41d"},"headline":"Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions","datePublished":"2018-07-26T04:26:48+00:00","dateModified":"2019-01-01T10:39:40+00:00","mainEntityOfPage":{"@id":"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510"},"wordCount":119,"image":{"@id":"https:\/\/labstt.phy.ncu.edu.tw\/archives\/510#primaryimage"},"thumbnailUrl":"https:\/\/labstt.phy.ncu.edu.tw\/wp-content\/uploads\/2018\/07\/medium.png","articleSection":["\u6700\u65b0\u7814\u7a76"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510","url":"https:\/\/labstt.phy.ncu.edu.tw\/en\/archives\/510","name":"Analytic expression for the giant fieldlike spin torque in spin-filter magnetic tunnel junctions &#060; 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