Enhanced dc spin pumping into a fluctuating ferromagnet near T-C

Article

关键词: MAGNETIZATION;    INJECTION;    RELAXATION;    TRANSPORT;    DYNAMICS;   

DOI  :  10.1103/PhysRevB.89.174417

来源: SCIE

【 摘 要 】

A linear-response formulation of the dc spin pumping, i.e., a spin injection from a precessing ferromagnet into an adjacent spin sink, is developed in view of describingmany-body effects caused by spin fluctuations in the spin sink. It is shown that when an itinerant ferromagnet near T-C is used as the spin sink, the spin pumping is largely increased owing to the fluctuation enhancement of the spin conductance across the precessing ferromagnet/spin sink interface. As an example, the enhanced spin pumping from yttrium iron garnet into nickel palladium alloy (T-C similar or equal to 20 K) is analyzed by means of a self-consistent renormalization scheme, and it is predicted that the enhancement can be as large as tenfold.

【 授权许可】

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