Antiferromagnetic Spin Seebeck Effect

Stephen M. Wu, Wei Zhang, Amit Kc, Pavel Borisov, John E. Pearson, J. Samuel Jiang, David Lederman, Axel Hoffmann, Anand Bhattacharya

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the observation of the spin Seebeck effect in antiferromagnetic MnF2. A device scale on-chip heater is deposited on a bilayer of MnF2 (110) (30 nm)/Pt (4 nm) grown by molecular beam epitaxy on a MgF2 (110) substrate. Using Pt as a spin detector layer, it is possible to measure the thermally generated spin current from MnF2 through the inverse spin Hall effect. The low temperature (2-80 K) and high magnetic field (up to 140 kOe) regime is explored. A clear spin-flop transition corresponding to the sudden rotation of antiferromagnetic spins out of the easy axis is observed in the spin Seebeck signal when large magnetic fields (>9 T) are applied parallel to the easy axis of the MnF2 thin film. When the magnetic field is applied perpendicular to the easy axis, the spin-flop transition is absent, as expected.

Original languageEnglish (US)
Article number097204
JournalPhysical review letters
Volume116
Issue number9
DOIs
StatePublished - Mar 3 2016
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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