Yttrium iron garnet thickness and frequency dependence of the spin-charge current conversion in YIG/Pt systems

2013/04/08 by V. Castel, Vincent Castel, Nynke Vlietstra +3 · 4 citations
Engineering · Physics and Astronomy · #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Quantum and electron transport phenomena #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.90.214434

published as PhysRevB, 2014 Vol.90, Pages 214434 · 6 pages, 5 figures

arxiv created 2013/04/08 · openalex publication_date 2014/12/22 · arxiv updated 2015/01/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

We report the frequency dependence of the spin current emission (spin pumping) in a hybrid ferrimagnetic insulator/normal metal system as a function of the insulating layer thickness. The system is based on an yttrium iron garnet (YIG) film [0.2, 1, and 3\phantom\rule0.28em0ex\ensuremathμm] grown by liquid-phase epitaxy coupled with a spin current detector of platinum[6 nm]. A strong YIG thickness dependence of the efficiency of the spin pumping has been observed. The highest conversion factor \ensuremathΔV/P_abs has been demonstrated for the thinner YIG (1.79 and 0.55 mV/mW at 2.5 and 10 GHz, respectively), which is of interest for research heading towards YIG-based devices. Furthermore, we demonstrate the threshold frequency dependence of the three-magnon splitting process, which is shown to cease to exist for the thinner YIG of 0.2\phantom\rule0.28em0ex\ensuremathμm.

Citations

• Theory of dipole-exchange spin wave spectrum for ferromagnetic films with mixed exchange boundary conditions

Cited by

• Ferromagnetic resonance studies of strain tuned Bi:YIG films
• Ferromagnetic resonance of a YIG film in the low frequency regime
• Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet/Pt bilayers
• Planar Hall effect induced spin rectification effect and its strong impact on spin pumping measurements