title: Enhanced Spin Pumping Efficiency in Antiferromagnetic IrMn Thin Films around the Magnetic Phase Transition.
abstract: We report the measurement of a spin pumping effect due to fluctuations of the magnetic order of IrMn thin films. A precessing NiFe ferromagnet injected spins into IrMn spin sinks, and enhanced damping was observed around the IrMn magnetic phase transition. Our data were compared to a recently developed theory and converted into interfacial spin mixing conductance enhancements. By spotting the spin pumping peak, the thickness dependence of the IrMn critical temperature could be determined and the characteristic length for the spin-spin interactions was deduced.
authors.affiliation: Univ. Grenoble Alpes, SPINTEC, F-38000 Grenoble, France.|CNRS, SPINTEC, F-38000 Grenoble, France.|CEA, INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: L
authors.initials: L
authors.lastname: Frangou
authors.affiliation: Univ. Grenoble Alpes, NM, F-38000 Grenoble, France.|CEA, INAC-NM, F-38000 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Oyarzún
authors.affiliation: Univ. Grenoble Alpes, SPINTEC, F-38000 Grenoble, France.|CNRS, SPINTEC, F-38000 Grenoble, France.|CEA, INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Auffret
authors.affiliation: Univ. Grenoble Alpes, NM, F-38000 Grenoble, France.|CEA, INAC-NM, F-38000 Grenoble, France.
authors.forename: L
authors.initials: L
authors.lastname: Vila
authors.affiliation: Univ. Grenoble Alpes, SCIB, F-38000 Grenoble, France.|CEA, INAC-SCIB, F-38000 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Gambarelli
authors.affiliation: Univ. Grenoble Alpes, SPINTEC, F-38000 Grenoble, France.|CNRS, SPINTEC, F-38000 Grenoble, France.|CEA, INAC-SPINTEC, F-38000 Grenoble, France.
authors.forename: V
authors.initials: V
authors.lastname: Baltz