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Spin Hall magnetoimpedance

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2014

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Lotze, Johannes
Huebl, Hans
Gross, Rudolf

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https://doi.org/10.1103/PhysRevB.90.174419
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http://arxiv.org/abs/1404.7432

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Physical Review B. American Physical Society (APS). 2014, 90(17), 174419. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.90.174419

Zusammenfassung

The recently discovered spin Hall magnetoresistance effect electrically probes pure spin current flow across a ferrimagnetic insulator/normal metal bilayer interface. While usually the dc electrical resistance of the bilayer is measured as a function of the magnetization orientation in the magnetic insulator, here we present magnetoimpedance measurements using bias currents with frequencies up to several GHz. We find that the spin Hall magnetoresistance effect is frequency independent up to frequencies of 3 GHz, corroborating the assumption of a frequency-independent spin Hall angle. Our data therefore show that all interaction time constants relevant for the spin Hall magnetoresistance effect are shorter than about 50 ps. Therefore this technique should allow for the fast readout of the magnetization direction in magnetic insulator/normal metal bilayers.

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ISO 690LOTZE, Johannes, Hans HUEBL, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, 2014. Spin Hall magnetoimpedance. In: Physical Review B. American Physical Society (APS). 2014, 90(17), 174419. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.90.174419
BibTex
@article{Lotze2014-04-29T17:01:30Zmagne-52423,
  year={2014},
  doi={10.1103/PhysRevB.90.174419},
  title={Spin Hall magnetoimpedance},
  number={17},
  volume={90},
  issn={2469-9950},
  journal={Physical Review B},
  author={Lotze, Johannes and Huebl, Hans and Gross, Rudolf and Goennenwein, Sebastian T. B.},
  note={Article Number: 174419}
}
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    <dcterms:abstract xml:lang="eng">The recently discovered spin Hall magnetoresistance effect electrically probes pure spin current flow across a ferrimagnetic insulator/normal metal bilayer interface. While usually the dc electrical resistance of the bilayer is measured as a function of the magnetization orientation in the magnetic insulator, here we present magnetoimpedance measurements using bias currents with frequencies up to several GHz. We find that the spin Hall magnetoresistance effect is frequency independent up to frequencies of 3 GHz, corroborating the assumption of a frequency-independent spin Hall angle. Our data therefore show that all interaction time constants relevant for the spin Hall magnetoresistance effect are shorter than about 50 ps. Therefore this technique should allow for the fast readout of the magnetization direction in magnetic insulator/normal metal bilayers.</dcterms:abstract>
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