title: Strong Suppression of the Spin Hall Effect in the Spin Glass State.
abstract: We have measured spin Hall effects in spin glass metals, CuMnBi alloys, with the spin absorption method in the lateral spin valve structure. Far above the spin glass temperature T(g) where the magnetic moments of Mn impurities are randomly frozen, the spin Hall angle of a CuMnBi ternary alloy is as large as that of a CuBi binary alloy. Surprisingly, however, it starts to decrease at about 4T(g) and becomes as little as 7 times smaller at 0.5T(g). A similar tendency was also observed in anomalous Hall effects in the ternary alloys. We propose an explanation in terms of a simple model considering the relative dynamics between the localized moment and the conduction electron spin.
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Niimi
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kimata
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Omori
authors.affiliation: Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan.
authors.forename: B
authors.initials: B
authors.lastname: Gu
authors.affiliation: Institut Laue Langevin, Boîte Postale 156, F-38042 Grenoble Cedex 9, France.|LPMMC (UMR 5493), Université Grenoble Alpes and CNRS, 25 rue des Martyrs, B.P. 166, 38042 Grenoble, France.
authors.forename: T
authors.initials: T
authors.lastname: Ziman
authors.affiliation: Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan.|ERATO, Japan Science and Technology Agency, Sendai 980-8577, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Maekawa
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 91767 Palaiseau France associée à l'Université de Paris-Sud, 91405 Orsay, France.
authors.forename: A
authors.initials: A
authors.lastname: Fert
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan.|RIKEN-CEMS, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Otani