[8a-E208-1~11] 10.2 Fundamental and exploratory device technologies for spin

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[8a-E208-2] Oersted-field control of a spin-wave signal in Bi-doped YIG detected by the inverse spin Hall effect

〇Ryuhei Kohno^1,2, Kyongmo An^5,2, Diane Gouere⁴, Abdelmadjid Anane⁴, Vladimir Naletov², Hikaru Nomura¹, Gregoire de Loubens⁶, Jamal Ben Youssef³, Laurent Vila², Olivier Klein² (1.SRIS, Tohoku Univ., 2.Spintec, Univ. Grenoble Alpes, 3.Lab-STICC, Univ. Bretagne, 4.Laboratoire Albert Fert, Univ. Paris-Saclay, 5.Chungbuk Univ., 6.SPEC, Univ. Paris-Saclay)

Keywords:

magnonics,spin wave,YIG

We show that a sub-milliampere dc current controls the amplitude of a spin-wave resonance detected by spin pumping and the inverse spin Hall effect (ISHE) in a 21-nm Bi₁Y₂Fe₅O₁₂ film with perpendicular anisotropy. The electrical current flows in a line just above the Pt detector to produce an Oersted field is below 1% of the applied field, whereas it strongly gates the detected signal. The resonance peak grows by up to ×2.5 when this field opposes the applied field and falls to about half for the opposite polarity. This control is independent of microwave power over one decade of drive, recovering resonance signals from below the noise without adding amplifiers or noise filter. Together with supporting micromagnetic simulations, our results establish an energy-efficient, current-gated means for the spin-pumping signal in an magnetic garnet with perpendicular anisostropy.