Scattering of a magnetostatic surface spin wave from a one-dimensional step potential in a ferromagnetic film

Arjun Balaji, Mikhail Kostylev, Matthieu Bailleul

Research output: Contribution to journalArticle

Abstract

As the research on magnetostatic surface spin waves (MSSWs) gains momentum, a concrete understanding of how these waves behave at interfaces is still undeveloped. In this work, we theoretically investigate how a MSSW traveling in a ferromagnetic film scatters across a sharp step of magnetic parameters in the film such as the applied field. An integral equation is derived, which describes the scattering process. We solve this equation both directly numerically and using a second Born approximation. We find that scattering produces partial reflection and partial transmission of the wave through the step. A nontrivial behavior of the amplitude of the transmitted wave as a function of the step size is observed in the calculation and analyzed.

Original languageEnglish
Article number163903
JournalJournal of Applied Physics
Volume125
Issue number16
DOIs
Publication statusPublished - 28 Apr 2019

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ferromagnetic films
magnetostatics
magnons
scattering
Born approximation
integral equations
momentum

Cite this

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abstract = "As the research on magnetostatic surface spin waves (MSSWs) gains momentum, a concrete understanding of how these waves behave at interfaces is still undeveloped. In this work, we theoretically investigate how a MSSW traveling in a ferromagnetic film scatters across a sharp step of magnetic parameters in the film such as the applied field. An integral equation is derived, which describes the scattering process. We solve this equation both directly numerically and using a second Born approximation. We find that scattering produces partial reflection and partial transmission of the wave through the step. A nontrivial behavior of the amplitude of the transmitted wave as a function of the step size is observed in the calculation and analyzed.",
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Scattering of a magnetostatic surface spin wave from a one-dimensional step potential in a ferromagnetic film. / Balaji, Arjun; Kostylev, Mikhail; Bailleul, Matthieu.

In: Journal of Applied Physics, Vol. 125, No. 16, 163903, 28.04.2019.

Research output: Contribution to journalArticle

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