In-plane angular dependence of the spin-wave nonreciprocity of an ultrathin film with Dzyaloshinskii-Moriya interaction

Journal Article · Mon Jul 13 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4926862· OSTI ID:22483188

Zhang, Vanessa Li; Di, Kai; Lim, Hock Siah; Ng, Ser Choon; Yu, Jiawei; Yoon, Jungbum; Qiu, Xuepeng; Yang, Hyunsoo ^[1]

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1. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)

The nonreciprocal propagation of spin waves in an ultrathin Pt/Co/Ni film has been measured by Brillouin light scattering. The frequency nonreciprocity, due to the interfacial Dzyaloshinskii-Moriya interaction (DMI), has a sinusoidal dependence on the in-plane angle between the magnon wavevector and the applied magnetic field. The results, which are in good agreement with analytical predictions reported earlier, yield a value of the DMI constant which is the same as that obtained previously from a study of the magnon dispersion relations. We have demonstrated that our magnon-dynamics based method can experimentally ascertain the DMI constant of multilayer thin films.

• OSTI ID: 22483188
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISPERSION RELATIONS
LAYERS
LIGHT SCATTERING
MAGNETIC FIELDS
SPIN WAVES
THIN FILMS