Magnetic phase transitions in Ta/CoFeB/MgO multilayers
We study thin films and magnetic tunnel junction nanopillars based on Ta/Co20Fe60B20/MgO multilayers by electrical transport and magnetometry measurements. These measurements suggest that an ultrathin magnetic oxide layer forms at the Co20Fe60B20/MgO interface. At approximately 160 K, the oxide unde...
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| Veröffentlicht in: | Applied physics letters 2015-05, Vol.106 (19) |
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| container_title | Applied physics letters |
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| creator | Barsukov, I. Fu, Yu Safranski, C. Chen, Y.-J. Youngblood, B. Gonçalves, A. M. Spasova, M. Farle, M. Katine, J. A. Kuo, C. C. Krivorotov, I. N. |
| description | We study thin films and magnetic tunnel junction nanopillars based on Ta/Co20Fe60B20/MgO multilayers by electrical transport and magnetometry measurements. These measurements suggest that an ultrathin magnetic oxide layer forms at the Co20Fe60B20/MgO interface. At approximately 160 K, the oxide undergoes a phase transition from an insulating antiferromagnet at low temperatures to a conductive weak ferromagnet at high temperatures. This interfacial magnetic oxide is expected to have significant impact on the magnetic properties of CoFeB-based multilayers used in spin torque memories. |
| doi_str_mv | 10.1063/1.4921306 |
| format | Article |
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This interfacial magnetic oxide is expected to have significant impact on the magnetic properties of CoFeB-based multilayers used in spin torque memories.</description><subject>ANTIFERROMAGNETISM</subject><subject>APPROXIMATIONS</subject><subject>CARBON DIOXIDE</subject><subject>COBALT COMPOUNDS</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>FERROMAGNETISM</subject><subject>INTERFACES</subject><subject>IRON BORIDES</subject><subject>LAYERS</subject><subject>MAGNESIUM OXIDES</subject><subject>MAGNETIC PROPERTIES</subject><subject>PHASE TRANSFORMATIONS</subject><subject>Physics</subject><subject>SPIN</subject><subject>SUPERCONDUCTING JUNCTIONS</subject><subject>TANTALUM</subject><subject>THIN FILMS</subject><subject>TORQUE</subject><subject>TUNNEL EFFECT</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNpFkE1PAjEYhBujiYge_AebePKw0Lfv9uuIRMAEwgXPTbd02Zpll2yrCf9eCERPk5k8M4ch5BnoCKjAMYwKzQCpuCEDoFLmCKBuyYBSirnQHO7JQ4xfJ8sZ4oCIld21PgWXHWobfZZ628aQQtfGLLTZxo6n3cy_jVe7dbb_blJo7NH38ZHcVbaJ_umqQ_I5e99MF_lyPf-YTpa5Qy5TLqUSHIQS26ISW1Ey7SmTCBRLqxD1tvC6ZKXl3jmlFQV0yEpVFsIxZjngkLxcdruYgokuJO9q17Wtd8kwhlrTQpyo1wtV28Yc-rC3_dF0NpjFZGnOGQWuuFDyB_5Z13cx9r76KwA15wsNmOuF-Auu-F9q</recordid><startdate>20150511</startdate><enddate>20150511</enddate><creator>Barsukov, I.</creator><creator>Fu, Yu</creator><creator>Safranski, C.</creator><creator>Chen, Y.-J.</creator><creator>Youngblood, B.</creator><creator>Gonçalves, A. 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N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnetic phase transitions in Ta/CoFeB/MgO multilayers</atitle><jtitle>Applied physics letters</jtitle><date>2015-05-11</date><risdate>2015</risdate><volume>106</volume><issue>19</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><abstract>We study thin films and magnetic tunnel junction nanopillars based on Ta/Co20Fe60B20/MgO multilayers by electrical transport and magnetometry measurements. These measurements suggest that an ultrathin magnetic oxide layer forms at the Co20Fe60B20/MgO interface. At approximately 160 K, the oxide undergoes a phase transition from an insulating antiferromagnet at low temperatures to a conductive weak ferromagnet at high temperatures. This interfacial magnetic oxide is expected to have significant impact on the magnetic properties of CoFeB-based multilayers used in spin torque memories.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4921306</doi><orcidid>https://orcid.org/0000-0002-7987-416X</orcidid><orcidid>https://orcid.org/0000-0002-1864-3261</orcidid></addata></record> |
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| identifier | ISSN: 0003-6951 |
| ispartof | Applied physics letters, 2015-05, Vol.106 (19) |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | ANTIFERROMAGNETISM APPROXIMATIONS CARBON DIOXIDE COBALT COMPOUNDS CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY FERROMAGNETISM INTERFACES IRON BORIDES LAYERS MAGNESIUM OXIDES MAGNETIC PROPERTIES PHASE TRANSFORMATIONS Physics SPIN SUPERCONDUCTING JUNCTIONS TANTALUM THIN FILMS TORQUE TUNNEL EFFECT |
| title | Magnetic phase transitions in Ta/CoFeB/MgO multilayers |
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