Yu. V. Nikulin, A. V. Kozhevnikov, S. L. Vysotsky, A. G. Temiryazev, M. E. Seleznev, Yu. V. Khivintsev, Yu. A. Filimonov, “EMF generation by magnetostatic waves in the YIG(111)-Pt structure in weak bias fields”, Fizika Tverdogo Tela, 2023, Volume 65, Issue 7,Pages <nobr>1180

XXVII International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 13-16, 2023
Magnetism

EMF generation by magnetostatic waves in the YIG(111)-Pt structure in weak bias fields

Yu. V. Nikulin^ab, A. V. Kozhevnikov^a, S. L. Vysotsky^ab, A. G. Temiryazev^c, M. E. Seleznev^a, Yu. V. Khivintsev^ab, Yu. A. Filimonov^ab

^a Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences, Saratov, Russia
^b Saratov State University, Saratov, Russia
^c Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences

Abstract: In a structure of an epitaxial film of yttrium iron garnet (YIG) with crystallographic orientation (111) 11.8 $\mu$m thick and 5 nm thick platinum (Pt) film deposited on its surface, the effect of EMF generation in a platinum film during the propagation of magnetostatic waves (MSW) in the structure was studied at values of the tangential constant magnetic field $H$ less than the saturation field $H_s\sim$ 65 Oe of the YIG film. The experiments were performed in a geometry where the field $\mathbf{H}$ was parallel to the crystallographic direction $[1\bar{2}1]$ and to the MSW antennas, and the distances from the input antenna to the output antenna and to the Pt film were $\sim$ 5 and $\sim$ mm, respectively. In the structure under consideration, at $|H|<H_s$, a stripe domain structure (SDS) was formed, which in fields $|H|<H_1\sim$ 5–7 Oe acquired a branching character in the near-surface layer. In the range of fields $H_1<|H|<H_2\approx$ 40 Oe, MSW propagation was observed in the frequency band $\Delta F_I\sim$ 300–550 MHz, which was accompanied by EMF generation due to the inverse spin Hall effect. In the interval $H_2<|H|\le H_s$, MSW propagation was observed in the frequency band $\Delta F_2\approx$ 750–1750 MHz, while the frequency interval in which the EMF signal was recorded turned out to be several times smaller due to the development of MSW parametric instability.

Keywords: magnetostatic surface waves, yttrium iron garnet, domain structure, platinum, inverse spin Hall effect.

Received: 17.04.2023
Revised: 17.04.2023
Accepted: 11.05.2023

DOI: 10.21883/FTT.2023.07.55842.19H