Perpendicular magnetic anisotropy induced by a cap layer in ultrathin MgO/CoFeB/Nb
Perpendicular magnetic anisotropy has been observed in MgO/CoFeB/Ta but not in MgO/CoFeB/Ru, indicating that the metal cap layer is crucial. In this study, we grew MgO/CoFeB (1.2 nm)/Nb (1–2.5 nm) by sputtering and found that the magnetic anisotropy depends upon the Na thickness. The easy axis is in...
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| Veröffentlicht in: | Journal of applied physics 2012-08, Vol.112 (3) |
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| container_title | Journal of applied physics |
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| creator | Cheng, Tsung-I Cheng, Chih-Wei Chern, G. |
| description | Perpendicular magnetic anisotropy has been observed in MgO/CoFeB/Ta but not in MgO/CoFeB/Ru, indicating that the metal cap layer is crucial. In this study, we grew MgO/CoFeB (1.2 nm)/Nb (1–2.5 nm) by sputtering and found that the magnetic anisotropy depends upon the Na thickness. The easy axis is in-plane when x = 1 nm but changes to perpendicular when x ≥ 1.2, and a transition from in-plane to perpendicular is observed at x = 1.1 nm. Perpendicular magnetic anisotropy gradually decays as the x increases, showing that it only exists in a small window of the cap Nb layer within ∼2 nm. |
| doi_str_mv | 10.1063/1.4742195 |
| format | Article |
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In this study, we grew MgO/CoFeB (1.2 nm)/Nb (1–2.5 nm) by sputtering and found that the magnetic anisotropy depends upon the Na thickness. The easy axis is in-plane when x = 1 nm but changes to perpendicular when x ≥ 1.2, and a transition from in-plane to perpendicular is observed at x = 1.1 nm. Perpendicular magnetic anisotropy gradually decays as the x increases, showing that it only exists in a small window of the cap Nb layer within ∼2 nm.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.4742195</identifier><language>eng</language><subject>Decay ; Magnesium oxide ; Magnetic anisotropy ; Niobium ; Sputtering ; Tantalum</subject><ispartof>Journal of applied physics, 2012-08, Vol.112 (3)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-cf07844b2e7f0239bc43d8814f2e998e1af6018b58948e3222283b10d36206793</citedby><cites>FETCH-LOGICAL-c328t-cf07844b2e7f0239bc43d8814f2e998e1af6018b58948e3222283b10d36206793</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Cheng, Tsung-I</creatorcontrib><creatorcontrib>Cheng, Chih-Wei</creatorcontrib><creatorcontrib>Chern, G.</creatorcontrib><title>Perpendicular magnetic anisotropy induced by a cap layer in ultrathin MgO/CoFeB/Nb</title><title>Journal of applied physics</title><description>Perpendicular magnetic anisotropy has been observed in MgO/CoFeB/Ta but not in MgO/CoFeB/Ru, indicating that the metal cap layer is crucial. In this study, we grew MgO/CoFeB (1.2 nm)/Nb (1–2.5 nm) by sputtering and found that the magnetic anisotropy depends upon the Na thickness. The easy axis is in-plane when x = 1 nm but changes to perpendicular when x ≥ 1.2, and a transition from in-plane to perpendicular is observed at x = 1.1 nm. Perpendicular magnetic anisotropy gradually decays as the x increases, showing that it only exists in a small window of the cap Nb layer within ∼2 nm.</description><subject>Decay</subject><subject>Magnesium oxide</subject><subject>Magnetic anisotropy</subject><subject>Niobium</subject><subject>Sputtering</subject><subject>Tantalum</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNotkDFPwzAUhC0EEqUw8A88whD6nu3E9ggVBaRCEYI5cpyXEpQmwU6G_HuK2lvudPp0wzF2jXCHkMkF3imtBNr0hM0QjE10msIpmwEITIzV9pxdxPgDgGiknbGPdwo9tWXtx8YFvnPblobac9fWsRtC10-8bsvRU8mLiTvuXc8bN1HY13xshuCG73163W4Wy25FD4u34pKdVa6JdHX0OftaPX4un5P15ulleb9OvBRmSHwF2ihVCNIVCGkLr2RpDKpKkLWG0FUZoClSY5UhKfYyskAoZSYg01bO2c1htw_d70hxyHd19NQ0rqVujDlmGhWA0XKP3h5QH7oYA1V5H-qdC1OOkP__lmN-_E3-Ab1_XXQ</recordid><startdate>20120801</startdate><enddate>20120801</enddate><creator>Cheng, Tsung-I</creator><creator>Cheng, Chih-Wei</creator><creator>Chern, G.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20120801</creationdate><title>Perpendicular magnetic anisotropy induced by a cap layer in ultrathin MgO/CoFeB/Nb</title><author>Cheng, Tsung-I ; Cheng, Chih-Wei ; Chern, G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-cf07844b2e7f0239bc43d8814f2e998e1af6018b58948e3222283b10d36206793</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Decay</topic><topic>Magnesium oxide</topic><topic>Magnetic anisotropy</topic><topic>Niobium</topic><topic>Sputtering</topic><topic>Tantalum</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cheng, Tsung-I</creatorcontrib><creatorcontrib>Cheng, Chih-Wei</creatorcontrib><creatorcontrib>Chern, G.</creatorcontrib><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cheng, Tsung-I</au><au>Cheng, Chih-Wei</au><au>Chern, G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Perpendicular magnetic anisotropy induced by a cap layer in ultrathin MgO/CoFeB/Nb</atitle><jtitle>Journal of applied physics</jtitle><date>2012-08-01</date><risdate>2012</risdate><volume>112</volume><issue>3</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>Perpendicular magnetic anisotropy has been observed in MgO/CoFeB/Ta but not in MgO/CoFeB/Ru, indicating that the metal cap layer is crucial. In this study, we grew MgO/CoFeB (1.2 nm)/Nb (1–2.5 nm) by sputtering and found that the magnetic anisotropy depends upon the Na thickness. The easy axis is in-plane when x = 1 nm but changes to perpendicular when x ≥ 1.2, and a transition from in-plane to perpendicular is observed at x = 1.1 nm. Perpendicular magnetic anisotropy gradually decays as the x increases, showing that it only exists in a small window of the cap Nb layer within ∼2 nm.</abstract><doi>10.1063/1.4742195</doi></addata></record> |
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| ispartof | Journal of applied physics, 2012-08, Vol.112 (3) |
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| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | Decay Magnesium oxide Magnetic anisotropy Niobium Sputtering Tantalum |
| title | Perpendicular magnetic anisotropy induced by a cap layer in ultrathin MgO/CoFeB/Nb |
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