Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2
Among van der Waals (vdW) layered ferromagnets, Fe3GeTe2 (FGT) is an excellent candidate material to form FGT/heavy metal heterostructures for studying the effect of spin-orbit torques (SOT). Its metallicity, strong perpendicular magnetic anisotropy built in the single atomic layers, relatively high...
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| description | Among van der Waals (vdW) layered ferromagnets, Fe3GeTe2 (FGT) is an excellent candidate material to form FGT/heavy metal heterostructures for studying the effect of spin-orbit torques (SOT). Its metallicity, strong perpendicular magnetic anisotropy built in the single atomic layers, relatively high Curie temperature (Tc about 225 K) and electrostatic gate tunability offer a tantalizing possibility of achieving the ultimate high SOT limit in monolayer all-vdW nanodevices. The spin current generated in Pt exerts a damping-like SOT on FGT magnetization. At about 2.5x1011 A/m2 current density,SOT causes the FGT magnetization to switch, which is detected by the anomalous Hall effect of FGT. To quantify the SOT effect, we measure the second harmonic Hall responses as the applied magnetic field rotates the FGT magnetization in the plane. Our analysis shows that the SOT efficiency is comparable with that of the best heterostructures containing three-dimensional (3D) ferromagnetic metals and much larger than that of heterostructures containing 3D ferrimagnetic insulators. Such large efficiency is attributed to the atomically flat FGT/Pt interface, which demonstrates the great potential of exploiting vdW heterostructures for highly efficient spintronic nanodevices. |
| doi_str_mv | 10.48550/arxiv.1903.00571 |
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Its metallicity, strong perpendicular magnetic anisotropy built in the single atomic layers, relatively high Curie temperature (Tc about 225 K) and electrostatic gate tunability offer a tantalizing possibility of achieving the ultimate high SOT limit in monolayer all-vdW nanodevices. The spin current generated in Pt exerts a damping-like SOT on FGT magnetization. At about 2.5x1011 A/m2 current density,SOT causes the FGT magnetization to switch, which is detected by the anomalous Hall effect of FGT. To quantify the SOT effect, we measure the second harmonic Hall responses as the applied magnetic field rotates the FGT magnetization in the plane. Our analysis shows that the SOT efficiency is comparable with that of the best heterostructures containing three-dimensional (3D) ferromagnetic metals and much larger than that of heterostructures containing 3D ferrimagnetic insulators. Such large efficiency is attributed to the atomically flat FGT/Pt interface, which demonstrates the great potential of exploiting vdW heterostructures for highly efficient spintronic nanodevices.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1903.00571</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Curie temperature ; Damping ; Ferrimagnetism ; Ferromagnetism ; Hall effect ; Heavy metals ; Heterostructures ; Insulators ; Magnetic anisotropy ; Magnetism ; Magnetization ; Materials selection ; Metallicity ; Nanotechnology devices ; Physics - Mesoscale and Nanoscale Physics ; Spintronics ; Torque</subject><ispartof>arXiv.org, 2019-03</ispartof><rights>2019. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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Its metallicity, strong perpendicular magnetic anisotropy built in the single atomic layers, relatively high Curie temperature (Tc about 225 K) and electrostatic gate tunability offer a tantalizing possibility of achieving the ultimate high SOT limit in monolayer all-vdW nanodevices. The spin current generated in Pt exerts a damping-like SOT on FGT magnetization. At about 2.5x1011 A/m2 current density,SOT causes the FGT magnetization to switch, which is detected by the anomalous Hall effect of FGT. To quantify the SOT effect, we measure the second harmonic Hall responses as the applied magnetic field rotates the FGT magnetization in the plane. Our analysis shows that the SOT efficiency is comparable with that of the best heterostructures containing three-dimensional (3D) ferromagnetic metals and much larger than that of heterostructures containing 3D ferrimagnetic insulators. Such large efficiency is attributed to the atomically flat FGT/Pt interface, which demonstrates the great potential of exploiting vdW heterostructures for highly efficient spintronic nanodevices.</description><subject>Curie temperature</subject><subject>Damping</subject><subject>Ferrimagnetism</subject><subject>Ferromagnetism</subject><subject>Hall effect</subject><subject>Heavy metals</subject><subject>Heterostructures</subject><subject>Insulators</subject><subject>Magnetic anisotropy</subject><subject>Magnetism</subject><subject>Magnetization</subject><subject>Materials selection</subject><subject>Metallicity</subject><subject>Nanotechnology devices</subject><subject>Physics - Mesoscale and Nanoscale Physics</subject><subject>Spintronics</subject><subject>Torque</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotj1FLwzAUhYMgOOZ-gE8GfG5Nk6ZNHmW4TRjoQ9_LbXrTZXRtTTq1_966-XTg8HE4HyEPCYtTJSV7Bv_jvuJEMxEzJvPkhiy4EEmkUs7vyCqEI2OMZzmXUizIx841h3aiaK0zDruRhsF1Ue8rN9Kx959npNDVNHy70Rxc19De0hYm9FhTi973J2g6HOkGxRYL5Pfk1kIbcPWfS1JsXov1Ltq_b9_WL_sIJNeRSA1kJrG11lAxpVJTo5AcDSAanWnk2jAtAfNsbithMikzUytAqVINtViSx-vsRbccvDuBn8o_7fKiPRNPV2Lw_WwRxvLYn303fyp5ohTLdSq0-AW6n1tq</recordid><startdate>20190301</startdate><enddate>20190301</enddate><creator>Alghamdi, Mohammed</creator><creator>Lohmann, Mark</creator><creator>Li, Junxue</creator><creator>Jothi, Palani R</creator><creator>Shao, Qiming</creator><creator>Aldosary, Mohammed</creator><creator>Tang, Su</creator><creator>Boniface Fokwa</creator><creator>Shi, Jing</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20190301</creationdate><title>Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2</title><author>Alghamdi, Mohammed ; 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Its metallicity, strong perpendicular magnetic anisotropy built in the single atomic layers, relatively high Curie temperature (Tc about 225 K) and electrostatic gate tunability offer a tantalizing possibility of achieving the ultimate high SOT limit in monolayer all-vdW nanodevices. The spin current generated in Pt exerts a damping-like SOT on FGT magnetization. At about 2.5x1011 A/m2 current density,SOT causes the FGT magnetization to switch, which is detected by the anomalous Hall effect of FGT. To quantify the SOT effect, we measure the second harmonic Hall responses as the applied magnetic field rotates the FGT magnetization in the plane. Our analysis shows that the SOT efficiency is comparable with that of the best heterostructures containing three-dimensional (3D) ferromagnetic metals and much larger than that of heterostructures containing 3D ferrimagnetic insulators. 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| subjects | Curie temperature Damping Ferrimagnetism Ferromagnetism Hall effect Heavy metals Heterostructures Insulators Magnetic anisotropy Magnetism Magnetization Materials selection Metallicity Nanotechnology devices Physics - Mesoscale and Nanoscale Physics Spintronics Torque |
| title | Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2 |
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