Large spin anomalous Hall effect in L10-FePt
Large spin anomalous Hall effect in L10-FePt
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DOI：
10.1103/physrevb.100.144427
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发表时间：
2019-06
期刊：
影响因子：
--
通讯作者：
T. Seki;S. Iihama;T. Taniguchi;K. Takanashi
中科院分区：
文献类型：
--
作者：
T. Seki;S. Iihama;T. Taniguchi;K. Takanashi
The spin anomalous Hall effect (SAHE), generating spin angular momentum flow (spin current, ${\mathbf{J}}_{\mathrm{s}})$, in an $L{1}_{0}\text{\ensuremath{-}}\mathrm{FePt}$ ferromagnet was quantitatively evaluated by exploiting giant magnetoresistance devices composed of $L{1}_{0}\text{\ensuremath{-}}\mathrm{FePt}|\mathrm{Cu}|\mathrm{N}{\mathrm{i}}_{81}\mathrm{F}{\mathrm{e}}_{19}$. From the ferromagnetic resonance linewidth modulated by the charge current $({\mathbf{J}}_{\mathrm{c}})$ injection, the spin anomalous Hall angle $({\ensuremath{\alpha}}_{\mathrm{SAHE}})$ was obtained to be 0.25 \ifmmode\pm\else\textpm\fi{} 0.03. The evaluation of ${\ensuremath{\alpha}}_{\mathrm{SAHE}}$ at different configurations of ${\mathbf{J}}_{\mathrm{c}}$ and magnetization made it possible to discuss the symmetry of SAHE, giving the unambiguous evidence that SAHE is the source of ${\mathbf{J}}_{\mathrm{s}}$. Thanks to the large ${\ensuremath{\alpha}}_{\mathrm{SAHE}}$, the SAHE-induced magnetization switching was achieved.
The spin anomalous Hall effect (SAHE), generating spin angular momentum flow (spin current, ${\mathbf{J}}_{\mathrm{s}})$, in an $L{1}_{0}\text{\ensuremath{-}}\mathrm{FePt}$ ferromagnet was quantitatively evaluated by exploiting giant magnetoresistance devices composed of $L{1}_{0}\text{\ensuremath{-}}\mathrm{FePt}|\mathrm{Cu}|\mathrm{N}{\mathrm{i}}_{81}\mathrm{F}{\mathrm{e}}_{19}$. From the ferromagnetic resonance linewidth modulated by the charge current $({\mathbf{J}}_{\mathrm{c}})$ injection, the spin anomalous Hall angle $({\ensuremath{\alpha}}_{\mathrm{SAHE}})$ was obtained to be 0.25 \ifmmode\pm\else\textpm\fi{} 0.03. The evaluation of ${\ensuremath{\alpha}}_{\mathrm{SAHE}}$ at different configurations of ${\mathbf{J}}_{\mathrm{c}}$ and magnetization made it possible to discuss the symmetry of SAHE, giving the unambiguous evidence that SAHE is the source of ${\mathbf{J}}_{\mathrm{s}}$. Thanks to the large ${\ensuremath{\alpha}}_{\mathrm{SAHE}}$, the SAHE-induced magnetization switching was achieved.