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Direct Detection of Pure ac Spin Current by X-Ray Pump-Probe Measurements.
Li, J; Shelford, L R; Shafer, P; Tan, A; Deng, J X; Keatley, P S; Hwang, C; Arenholz, E; van der Laan, G; Hicken, R J; Qiu, Z Q.
Afiliação
  • Li J; International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.
  • Shelford LR; Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
  • Shafer P; Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, Devon EX4 4QL, United Kingdom.
  • Tan A; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Deng JX; Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
  • Keatley PS; Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
  • Hwang C; Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, Devon EX4 4QL, United Kingdom.
  • Arenholz E; Korea Research Institute of Standards and Science, Yuseong, Daejeon 305-340, Republic of Korea.
  • van der Laan G; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Hicken RJ; Magnetic Spectroscopy Group, Diamond Light Source, Didcot, Oxfordshire OX11 0DE, United Kingdom.
  • Qiu ZQ; Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, Devon EX4 4QL, United Kingdom.
Phys Rev Lett ; 117(7): 076602, 2016 Aug 12.
Article em En | MEDLINE | ID: mdl-27563981
ABSTRACT
Despite recent progress in spin-current research, the detection of spin current has mostly remained indirect. By synchronizing a microwave waveform with synchrotron x-ray pulses, we use the ferromagnetic resonance of the Py (Ni_{81}Fe_{19}) layer in a Py/Cu/Cu_{75}Mn_{25}/Cu/Co multilayer to pump a pure ac spin current into the Cu_{75}Mn_{25} and Co layers, and then directly probe the spin current within the Cu_{75}Mn_{25} layer and the spin dynamics of the Co layer by x-ray magnetic circular dichroism. This element-resolved pump-probe measurement unambiguously identifies the ac spin current in the Cu_{75}Mn_{25} layer.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Diagnostic_studies Idioma: En Ano de publicação: 2016 Tipo de documento: Article
Texto completo
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XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Diagnostic_studies Idioma: En Ano de publicação: 2016 Tipo de documento: Article