Controlled interconversion of quantized spin wave modes via local magnetic fields

Year: 2019

Type: article

Abstract: In the emerging field of magnonics, spin waves are considered for information processing and transmission at high frequencies. Accordingly, the manipulation of propagating spin waves in nanostructured waveguides for novel functionality has attracted increased attention. Excitations with uniform magnetic fields in such waveguides favor symmetric spin-wave modes with odd quantization numbers. Interference between multiple odd spin-wave modes leads to a periodic self-focusing effect of the propagating spin waves. In this work we demonstrate how antisymmetric spin-wave modes with even quantization numbers can be induced by local magnetic fields in a well-controlled fashion. The resulting interference patterns are discussed within an analytical model and experimentally demonstrated using microfocused Brillouin light scattering.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.100.014429

Authors: Zhizhi Zhang, Michael Vogel, José Holanda, Junjia Ding, M. Benjamin Jungfleisch, Yi Li, John E. Pearson, Ralu Divan, Wei Zhang, Axel Hoffmann, Yan Nie, Valentine Novosad

Institutions: Argonne National Laboratory, Huazhong University of Science and Technology, University of Delaware, Oakland University, Center for Nanoscale Materials

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Conselho Nacional de Desenvolvimento Científico e Tecnológico, China Scholarship Council, Office of Science, Division of Materials Research, Basic Energy Sciences, Argonne National Laboratory

OpenAlex ID: W2941538729