Homogeneous microwave field emitted propagating spin waves: Direct imaging and modeling
Homogeneous microwave field emitted propagating spin waves: Direct imaging and modeling
复制标题
均匀微波场发射传播自旋波:直接成像和建模
DOI:
10.1016/j.jmmm.2017.06.053
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发表时间:
2018
影响因子:
2.7
通讯作者:
J. McCord
中科院分区:
文献类型:
--
作者:
M. Lohman;B. Mozooni;J. McCord
We explore the generation of propagating dipolar spin waves by homogeneous magnetic field excitation in the proximity of the boundaries of magnetic microstructures. Domain wall motion, precessional dynamics, and propagating spin waves are directly imaged by time-resolved wide-field magneto-optical Kerr effect microscopy. The aspects of spin wave generation are clarified by micromagnetic calculations matching the experimental results. The region of dipolar spin wave formation is confined to the local resonant excitation due to non-uniform internal demagnetization fields at the edges of the patterned sample. Magnetic domain walls act as a border for the propagation of plane and low damped spin waves, thus restraining the spin waves within the individual magnetic domains. The findings are of significance for the general understanding of structural and configurational magnetic boundaries for the creation, the propagation, and elimination of spin waves.
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