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- Title
Probing magnon–magnon coupling in exchange coupled Y3Fe5O12/Permalloy bilayers with magneto-optical effects.
- Authors
Xiong, Yuzan; Li, Yi; Hammami, Mouhamad; Bidthanapally, Rao; Sklenar, Joseph; Zhang, Xufeng; Qu, Hongwei; Srinivasan, Gopalan; Pearson, John; Hoffmann, Axel; Novosad, Valentine; Zhang, Wei
- Abstract
We demonstrate the magnetically-induced transparency (MIT) effect in Y 3 Fe 5 O 12 (YIG)/Permalloy (Py) coupled bilayers. The measurement is achieved via a heterodyne detection of the coupled magnetization dynamics using a single wavelength that probes the magneto-optical Kerr and Faraday effects of Py and YIG, respectively. Clear features of the MIT effect are evident from the deeply modulated ferromagnetic resonance of Py due to the perpendicular-standing-spin-wave of YIG. We develop a phenomenological model that nicely reproduces the experimental results including the induced amplitude and phase evolution caused by the magnon–magnon coupling. Our work offers a new route towards studying phase-resolved spin dynamics and hybrid magnonic systems.
- Subjects
YTTRIUM iron garnet; MAGNETOOPTICS; TRANSPARENCY (Optics); HETERODYNE detection; KERR magneto-optical effect
- Publication
Scientific Reports, 2020, Vol 10, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-020-69364-6