Tunable Sign Change of Spin Hall Magnetoresistance in Pt/NiO/YIG Structures
Spin Hall magnetoresistance (SMR) has been investigated in Pt/NiO/YIG structures in a wide range of temperature and NiO thickness. The SMR shows a negative sign below a temperature that increases with the NiO thickness. This is contrary to a conventional SMR theory picture applied to the Pt/YIG bila...
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| Veröffentlicht in: | Physical review letters 2017-04, Vol.118 (14), p.147202-147202, Article 147202 |
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| container_title | Physical review letters |
| container_volume | 118 |
| creator | Hou, Dazhi Qiu, Zhiyong Barker, Joseph Sato, Koji Yamamoto, Kei Vélez, Saül Gomez-Perez, Juan M Hueso, Luis E Casanova, Fèlix Saitoh, Eiji |
| description | Spin Hall magnetoresistance (SMR) has been investigated in Pt/NiO/YIG structures in a wide range of temperature and NiO thickness. The SMR shows a negative sign below a temperature that increases with the NiO thickness. This is contrary to a conventional SMR theory picture applied to the Pt/YIG bilayer, which always predicts a positive SMR. The negative SMR is found to persist even when NiO blocks the spin transmission between Pt and YIG, indicating it is governed by the spin current response of the NiO layer. We explain the negative SMR by the NiO "spin flop" coupled with YIG, which can be overridden at higher temperature by positive SMR contribution from YIG. This highlights the role of magnetic structure in antiferromagnets for transport of pure spin current in multilayers. |
| doi_str_mv | 10.1103/PhysRevLett.118.147202 |
| format | Article |
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The SMR shows a negative sign below a temperature that increases with the NiO thickness. This is contrary to a conventional SMR theory picture applied to the Pt/YIG bilayer, which always predicts a positive SMR. The negative SMR is found to persist even when NiO blocks the spin transmission between Pt and YIG, indicating it is governed by the spin current response of the NiO layer. We explain the negative SMR by the NiO "spin flop" coupled with YIG, which can be overridden at higher temperature by positive SMR contribution from YIG. 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The SMR shows a negative sign below a temperature that increases with the NiO thickness. This is contrary to a conventional SMR theory picture applied to the Pt/YIG bilayer, which always predicts a positive SMR. The negative SMR is found to persist even when NiO blocks the spin transmission between Pt and YIG, indicating it is governed by the spin current response of the NiO layer. We explain the negative SMR by the NiO "spin flop" coupled with YIG, which can be overridden at higher temperature by positive SMR contribution from YIG. This highlights the role of magnetic structure in antiferromagnets for transport of pure spin current in multilayers.</description><subject>Antiferromagnetism</subject><subject>Electric current</subject><subject>Magnetic structure</subject><subject>Magnetoresistance</subject><subject>Magnetoresistivity</subject><subject>Multilayers</subject><subject>Spintronics</subject><subject>Transport</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqFkE1PwjAYxxujUXz5CqRHL4PnadetOxqiQEQhggdPS9d2MDM2XDsTvr0zoPHm6Un-b0_yI6SPMEAEPlxs9u7Ffs6s950gBxjGDNgJ6SHESRAjhqekB8AxSADiC3Lp3DsAIIvkOblgMuQgUPbI46qtVFZauizWFR1tVLW2tM7pcldUdKLKkj6pdWV93VhXOK8qbWnnLPzwuZgP36ZjuvRNq33b-dfkLFelszfHe0VeH-5Xo0kwm4-no7tZoHkY-iCJMQaMjWFoslybXOrYRBJAWpkJKSLR6RHHiBtmuVYKhBI65yFHpqzJ-BW5Pezumvqjtc6n28JpW5aqsnXrUkwgZIxzwP-jMulQCWCii0aHqG5q5xqbp7um2KpmnyKk38zTP8w7QaYH5l2xf_zRZltrfms_kPkXg8d-sQ</recordid><startdate>20170407</startdate><enddate>20170407</enddate><creator>Hou, Dazhi</creator><creator>Qiu, Zhiyong</creator><creator>Barker, Joseph</creator><creator>Sato, Koji</creator><creator>Yamamoto, Kei</creator><creator>Vélez, Saül</creator><creator>Gomez-Perez, Juan M</creator><creator>Hueso, Luis E</creator><creator>Casanova, Fèlix</creator><creator>Saitoh, Eiji</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20170407</creationdate><title>Tunable Sign Change of Spin Hall Magnetoresistance in Pt/NiO/YIG Structures</title><author>Hou, Dazhi ; Qiu, Zhiyong ; Barker, Joseph ; Sato, Koji ; Yamamoto, Kei ; Vélez, Saül ; Gomez-Perez, Juan M ; Hueso, Luis E ; Casanova, Fèlix ; Saitoh, Eiji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c344t-9717017dd21dbfcdf8c7d68008e8b585651db63163d2e3caa05a5cf34312aedb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Antiferromagnetism</topic><topic>Electric current</topic><topic>Magnetic structure</topic><topic>Magnetoresistance</topic><topic>Magnetoresistivity</topic><topic>Multilayers</topic><topic>Spintronics</topic><topic>Transport</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hou, Dazhi</creatorcontrib><creatorcontrib>Qiu, Zhiyong</creatorcontrib><creatorcontrib>Barker, Joseph</creatorcontrib><creatorcontrib>Sato, Koji</creatorcontrib><creatorcontrib>Yamamoto, Kei</creatorcontrib><creatorcontrib>Vélez, Saül</creatorcontrib><creatorcontrib>Gomez-Perez, Juan M</creatorcontrib><creatorcontrib>Hueso, Luis E</creatorcontrib><creatorcontrib>Casanova, Fèlix</creatorcontrib><creatorcontrib>Saitoh, Eiji</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hou, Dazhi</au><au>Qiu, Zhiyong</au><au>Barker, Joseph</au><au>Sato, Koji</au><au>Yamamoto, Kei</au><au>Vélez, Saül</au><au>Gomez-Perez, Juan M</au><au>Hueso, Luis E</au><au>Casanova, Fèlix</au><au>Saitoh, Eiji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Tunable Sign Change of Spin Hall Magnetoresistance in Pt/NiO/YIG Structures</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2017-04-07</date><risdate>2017</risdate><volume>118</volume><issue>14</issue><spage>147202</spage><epage>147202</epage><pages>147202-147202</pages><artnum>147202</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>Spin Hall magnetoresistance (SMR) has been investigated in Pt/NiO/YIG structures in a wide range of temperature and NiO thickness. The SMR shows a negative sign below a temperature that increases with the NiO thickness. This is contrary to a conventional SMR theory picture applied to the Pt/YIG bilayer, which always predicts a positive SMR. The negative SMR is found to persist even when NiO blocks the spin transmission between Pt and YIG, indicating it is governed by the spin current response of the NiO layer. We explain the negative SMR by the NiO "spin flop" coupled with YIG, which can be overridden at higher temperature by positive SMR contribution from YIG. This highlights the role of magnetic structure in antiferromagnets for transport of pure spin current in multilayers.</abstract><cop>United States</cop><pmid>28430518</pmid><doi>10.1103/PhysRevLett.118.147202</doi><tpages>1</tpages></addata></record> |
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| subjects | Antiferromagnetism Electric current Magnetic structure Magnetoresistance Magnetoresistivity Multilayers Spintronics Transport |
| title | Tunable Sign Change of Spin Hall Magnetoresistance in Pt/NiO/YIG Structures |
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