期刊
PHYSICAL REVIEW B
卷 90, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.140406
关键词
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资金
- National Science Foundation through the Materials Research Science and Engineering Center at The Ohio State University [DMR-0820414]
- EPSRC [EP/H029257/1]
- EU European Research Council (ERC) [268066]
- Ministry of Education of the Czech Republic [LM2011026]
- Grant Agency of the Czech Republic [14-37427G]
- Academy of Sciences of the Czech Republic Praemium Academiae
- Alexander Von Humboldt Foundation
- Engineering and Physical Sciences Research Council [EP/H029257/1] Funding Source: researchfish
- EPSRC [EP/H029257/1] Funding Source: UKRI
We theoretically investigate the tunneling anisotropic magneto-Seebeck effect in a realistically modeled CoPt/MgO/Pt tunnel junction using coherent transport calculations. For comparison we study the tunneling magneto-Seebeck effect in CoPt/MgO/CoPt as well. We find that the magneto-Seebeck ratio of CoPt/MgO/Pt exceeds that of CoPt/MgO/CoPt for small barrier widths, reaching 175% at room temperature. This provides a sharp contrast to the magnetoresistance, in which CoPt/MgO/CoPt performs better by one order of magnitude for all barrier widths. Thus, by switching from two ferromagnetic layers to one (so that spin-orbit coupling alone governs the magnetic transport anisotropy), the magnetoresistance ratio diminishes while the magneto-Seebeck ratio remains comparable or improves considerably. We therefore demonstrate that magnetic tunability can increase when caused solely by spin-orbit coupling. This result sheds light on the role that spin-orbit coupling plays in magnetically tuning the properties of tunnel junctions.
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