Magnetic imaging in thin magnetic films by local spectrometer of ferromagnetic resonance |
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Authors: | Belyaev B.A. Izotov A.V. Leksikov A.A. |
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Affiliation: | L. V. Kirensky Inst. of Phys., Russian Acad. of Sci., Krasnoyarsk, Russia; |
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Abstract: | The automatized scanning spectrometer of ferromagnetic resonance has been designed for measuring a distribution of in-plane magnetic anisotropy, effective saturation magnetization, coercivity, and other performances across the area of thin magnetic films (TMFs) in a monodomain state. The spectrometer is supplied with a set of plug-in measuring heads overlapping frequency band 0.1 /spl divide/ 6.0 GHz. The degree of locality of measurements in the range 0.3 /spl divide/ 2.5 mm is defined by the size of the measuring hole in the microstrip resonator built in the head. The signal-to-noise ratio of the heads is not less than 10 for permalloy film of 100-/spl Aring/ thickness when the locality of measurements is about 1 mm, and it can be increased considerably in the signal accumulation mode. Magnetic imaging is demonstrated with an example of purposely-stressed TMFs. |
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