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Spin-wave propagation in the presence of interfacial Dzyaloshinskii-Moriya interaction

2013; American Physical Society; Volume: 88; Issue: 18 Linguagem: Inglês

10.1103/physrevb.88.184404

1550-235X

Jung‐Hwan Moon, Soo-Man Seo, Kyung‐Jin Lee, Kyoung‐Whan Kim, Jisu Ryu, Hyun‐Woo Lee, R. D. McMichael, M. D. Stiles,

Copper Interconnects and Reliability

In ferromagnetic thin films, broken inversion symmetry and spin-orbit coupling give rise to interfacial Dzyaloshinskii-Moriya interactions. Analytic expressions for spin-wave properties show that the interfacial Dzyaloshinskii-Moriya interaction leads to nonreciprocal spin-wave propagation, i.e., different properties for spin waves propagating in opposite directions. In favorable situations, it can increase the spin-wave attenuation length. Comparing measured spin-wave properties in ferromagnet/normal metal bilayers and other artificial layered structures with these calculations could provide a useful characterization of the interfacial Dzyaloshinskii-Moriya interactions.