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Magnetization switching through giant spin-orbit torque in a magnetically doped topological insulator heterostructure.
Fan, Yabin; Upadhyaya, Pramey; Kou, Xufeng; Lang, Murong; Takei, So; Wang, Zhenxing; Tang, Jianshi; He, Liang; Chang, Li-Te; Montazeri, Mohammad; Yu, Guoqiang; Jiang, Wanjun; Nie, Tianxiao; Schwartz, Robert N; Tserkovnyak, Yaroslav; Wang, Kang L.
Afiliación
  • Fan Y; 1] Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA [2].
  • Upadhyaya P; 1] Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA [2].
  • Kou X; 1] Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA [2].
  • Lang M; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Takei S; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Wang Z; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Tang J; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • He L; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Chang LT; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Montazeri M; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Yu G; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Jiang W; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Nie T; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Schwartz RN; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Tserkovnyak Y; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
  • Wang KL; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
Nat Mater ; 13(7): 699-704, 2014 Jul.
Article en En | MEDLINE | ID: mdl-24776536
ABSTRACT
Recent demonstrations of magnetization switching induced by in-plane current in heavy metal/ferromagnetic heterostructures (HMFHs) have drawn great attention to spin torques arising from large spin-orbit coupling (SOC). Given the intrinsic strong SOC, topological insulators (TIs) are expected to be promising candidates for exploring spin-orbit torque (SOT)-related physics. Here we demonstrate experimentally the magnetization switching through giant SOT induced by an in-plane current in a chromium-doped TI bilayer heterostructure. The critical current density required for switching is below 8.9 × 10(4) A cm(-2) at 1.9 K. Moreover, the SOT is calibrated by measuring the effective spin-orbit field using second-harmonic methods. The effective field to current ratio and the spin-Hall angle tangent are almost three orders of magnitude larger than those reported for HMFHs. The giant SOT and efficient current-induced magnetization switching exhibited by the bilayer heterostructure may lead to innovative spintronics applications such as ultralow power dissipation memory and logic devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Mater Asunto de la revista: CIENCIA / QUIMICA Año: 2014 Tipo del documento: Article
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Mater Asunto de la revista: CIENCIA / QUIMICA Año: 2014 Tipo del documento: Article