Non-symmetric spin-pumping in a multiferroic heterostructure

Abstract

We present spin pumping experiments in Co/Pt bilayers grown on Al2O3(0001) and on ferroelectric Y-cut LiNbO3 substrates. Spin pumping is triggered by resonant ferromagnetic resonance induced by surface acoustic waves. We observe that spin pumping efficiency varies when both the magnetization vector and the acoustic wave vector are reversed in Pt/Co/LiNbO3. This phenomenon is not observed in Pt/Co/Al2O3. We propose that the in-plane electric polarization of LiNbO3 is at the origin of the observed phenomenon. These observations open up the perspective of an electric field control of spin pumping efficiency.

References in corpus (7)

• Spin Seebeck insulator
• Room Temperature Reversible Spin Hall Effect
• Acoustically driven ferromagnetic resonance
• Spin pumping with coherent elastic waves
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Spin current noise of the spin Seebeck effect and spin pumping
• Broadband ferromagnetic resonance characterization of GaMnAs thin films

Cited by in corpus (1)

• Impact of Spin Wave Dispersion on Surface Acoustic Wave Velocity