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| Analysis of Hysteretic Giant Magnetoimpedance Using Stoner-Wohlfarth Model |
| Journal of Magnetics, Volume 5, Number 3, 30 Sep 2000, Pages 85-89 |
| K. J. Jang(Department of Physics and Advanced Materials Science, Sun Moon University, Research Center for Advanced Magnetic Materials, Chungnam National University), C. G. Kim(Department of Physics and Advanced Materials Science, Sun Moon University), D. Y. Kim(Systems SBU, Hyundai Electronics Co., Ltd.), C. O. Kim(Research Center for Advanced Magnetic Materials, Chungnam National University) |
| Abstract |
| The hysteretic characteristics of giant magnetoimpedance (GMI) profiles have been measured in Co-based amorphous ribbon with various anisotropy angles θK, and they have been analyzed by using the Stoner-Wohl-farth model. Two-peaks behavior with a dip near zero field is revealed in the measured GMI profile at 10 MHz irrespective of θK. The negligible hysteresis of the field fur the dip is close to the calculation assuming the magnetization jump from a metastable to stable state. However, the hysteretic asymmetry far the angle range of 20° ≤ 60° is well described by the divergence in the calculation without the magnetization jump. The asymmetry θk ≥ 60° for may be due to the divergence, but the shapes of measured profiles are quite different from the calculations with single peak near zero field, indicating that Stoner-Wohlfarth model can be well used to describe GMI characteristics for the anisotropy angle range of 20° ≤ 60° at the frequency of 10 MHz in Co-based amorphous ribbons. |
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