Type of Publication: | Journal article |
Publication status: | Published |
Author: | Wimmer, Tobias; Coester, Birte; Geprägs, Stephan; Gross, Rudolf; Gönnenwein, Sebastian T. B.; Huebl, Hans; Althammer, Matthias |
Year of publication: | 2019 |
Published in: | Applied Physics Letters ; 115 (2019), 9. - 092404. - American Institute of Physics (AIP). - ISSN 0003-6951. - eISSN 1077-3118 |
ArXiv-ID: | arXiv:1905.00663 |
DOI (citable link): | https://dx.doi.org/10.1063/1.5101032 |
Summary: |
We report on the determination of the anomalous spin Hall angle in the ferromagnetic metal alloy cobalt-iron (Co25Fe75, CoFe). This is accomplished by measuring the spin injection/detection efficiency in a multiterminal device with nanowires of platinum (Pt) and CoFe deposited onto the magnetic insulator yttrium iron garnet (Y3Fe5O12, YIG). Applying a spin-resistor model to our multiterminal spin transport data, we determine the magnon conductivity in YIG, the spin conductance at the YIG/CoFe interface, and finally the anomalous spin Hall angle of CoFe as a function of its spin diffusion length in a single device. Our experiments clearly reveal a negative anomalous spin Hall angle of the ferromagnetic metal CoFe, but a vanishing ordinary spin Hall angle. This work, therefore, adds new observations to the results reported in Tian et al. [Phys. Rev. B 94, 020403 (2016)] and Das et al. [Phys. Rev. B 96, 220408(R) (2017)] , where the authors found finite contributions of the ordinary spin Hall angle in the ferromagnetic metals Co and Permalloy.
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Subject (DDC): | 530 Physics |
Refereed: | Yes |
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WIMMER, Tobias, Birte COESTER, Stephan GEPRÄGS, Rudolf GROSS, Sebastian T. B. GÖNNENWEIN, Hans HUEBL, Matthias ALTHAMMER, 2019. Anomalous spin Hall angle of a metallic ferromagnet determined by a multiterminal spin injection/detection device. In: Applied Physics Letters. American Institute of Physics (AIP). 115(9), 092404. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.5101032
@article{Wimmer2019-05-02T10:55:25ZAnoma-51779, title={Anomalous spin Hall angle of a metallic ferromagnet determined by a multiterminal spin injection/detection device}, year={2019}, doi={10.1063/1.5101032}, number={9}, volume={115}, issn={0003-6951}, journal={Applied Physics Letters}, author={Wimmer, Tobias and Coester, Birte and Geprägs, Stephan and Gross, Rudolf and Gönnenwein, Sebastian T. B. and Huebl, Hans and Althammer, Matthias}, note={Article Number: 092404} }