title: Antiferromagnetic Spin Seebeck Effect.
abstract: We report on the observation of the spin Seebeck effect in antiferromagnetic MnF_{2}. A device scale on-chip heater is deposited on a bilayer of MnF_{2} (110) (30  nm)/Pt (4 nm) grown by molecular beam epitaxy on a MgF_{2} (110) substrate. Using Pt as a spin detector layer, it is possible to measure the thermally generated spin current from MnF_{2} 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 MnF_{2} thin film. When the magnetic field is applied perpendicular to the easy axis, the spin-flop transition is absent, as expected.
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Wu
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506, USA.
authors.forename: Amit
authors.initials: A
authors.lastname: Kc
authors.affiliation: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506, USA.
authors.forename: Pavel
authors.initials: P
authors.lastname: Borisov
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: John E
authors.initials: JE
authors.lastname: Pearson
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: J Samuel
authors.initials: JS
authors.lastname: Jiang
authors.affiliation: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506, USA.
authors.forename: David
authors.initials: D
authors.lastname: Lederman
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Axel
authors.initials: A
authors.lastname: Hoffmann
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Anand
authors.initials: A
authors.lastname: Bhattacharya