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Electron-spin-resonance analysis of magnetic ordering in Co58Mn20B10Si12 amorphous alloy

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4 Author(s)
Yoon, Chong Seung ; Division of Advanced Materials Science, Hanyang University, Seoul, 133-791, Korea ; Chung, Keum Jee ; Kim, Ji Won ; Kim, Chang Kyung

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Electron-spin-resonance (ESR) spectroscopy was used to study the magnetic structure of the paramagnetic Co58Mn20B10Si12 amorphous alloy, produced by melt spinning. The room-temperature ESR spectrum consisted of two resonance peaks (g=2.00 and g=5.22). The resonance peak at g=5.22 was tentatively attributed to a possible existence of Co2+ ion clusters in the amorphous alloy. It was also shown that the ESR data obtained at different temperatures were consistent with the magnetic measurement, proving that ESR can be a useful tool probing magnetic states in an amorphous metal alloy. Moreover, the ESR spectra from the thermally annealed alloy showed that the peak at g=5.22 is sensitive to the annealing temperature, suggesting that this resonance peak can be used as a signature signal for a magnetic sensor.

Published in:

Journal of Applied Physics  (Volume:98 ,  Issue: 8 )