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Measurement of the Ferromagnetic Resonance of a Single Micron Dot by Using a Vector Network Analyzer
Kazuto Yamanoi,Takashi Manago,Satoshi Yakata,Takashi Kimura 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The ferromagnetic resonance of a single micron-scale dot of permalloy was measured by using avector network analyzer. The resonant frequency shifted to higher frequency with increasing aspectratio of the sample. This tendency was remarkable for narrower width samples, especially the1-µm-width dots. This means that the demagnetization effect of thin films for the ferromagneticresonance becomes large when the sample width is less than 1 µm. The resonant frequency canbe largely controlled by changing the sample width for a thin film with a width of less than 1 µm,which is a favorable characteristics for various microwave applications.