Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system

O. d'Allivy Kelly (1) , A. Anane (1) , R. Bernard (1) , J. Ben Youssef (2) , C. Hahn (3) , a H. Molpeceres (1) , C. Carrétéro (1) , E. Jacquet (1) , C. Deranlot (1) , P. Bortolotti (1) , R. Lebourgeois (4) , J.-C. Mage (1) , G. de Loubens (3) , O. Klein (3) , V. Cros (1) , A. Fert (1)

1 UMPhy CNRS/THALES - Unité mixte de physique CNRS/Thales
2 LMB - Laboratoire de magnétisme de Bretagne
3 SPEC - UMR3680 - Service de physique de l'état condensé
4 Thales Research and Technology [Palaiseau]

High quality nanometer-thick (20 nm, 7 nm and 4 nm) epitaxial YIG films have been grown on GGG substrates using pulsed laser deposition. The Gilbert damping coefficient for the 20 nm thick films is 2.3 x 10-4 which is the lowest value reported for sub-micrometric thick films. We demonstrate Inverse spin Hall effect (ISHE) detection of propagating spin waves using Pt. The amplitude and the lineshape of the ISHE voltage correlate well to the increase of the Gilbert damping when decreasing thickness of YIG. Spin Hall effect based loss-compensation experiments have been conducted but no change in the magnetization dynamics could be detected.

Keywords: Inverse Spin Hall Effect; spin waves; YIG; FMR

Domains: Physics [physics]; Condensed Matter [cond-mat]

O. d'Allivy Kelly, A. Anane, R. Bernard, J. Ben Youssef, C. Hahn, et al.. Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system. Applied Physics Letters, 2013, 103 (8), pp.082408. ⟨10.1063/1.4819157⟩. ⟨cea-01478963⟩