Analysis of Hysteretic Giant Magnetoimpedance Using Stoner-Wohlfarth Model

  • Jang, K.J. (Department of Physics and Advanced Materials Science, Sun Moon University, Research Center for Advanced Magnetic Materials, Chungnam National University) ;
  • Kim, C.G. (Department of Physics and Advanced Materials Science, Sun Moon University) ;
  • Kim, D.Y. (Telecom Systems SBU, Hyundai Electronics Co., Ltd.) ;
  • Kim, C.O. (Research Center for Advanced Magnetic Materials, Chungnam National University)
  • Published : 2000.09.01

Abstract

The hysteretic characteristics of giant magnetoimpedance (GMI) profiles have been measured in Co-based amorphous ribbon with various anisotropy angles $\theta_k$, 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 $\theta_k$. 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 $20^\circ\leq\theta_k < 60^\circ$ is well described by the divergence in the calculation without the magnetization jump. The asymmetry for $\theta_k\geq60^\circ$ 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 $20^\circ\leq\theta_k < 60^\circ$at the frequency of 10 MHz in Co-based amorphous ribbons.

Keywords

References

  1. Appl. Phys. Lett v.77 D. X. Chen;L. Pascual;A. Hernando
  2. J. Appl. Phys v.87 D. P. Makhnovskiy;L. V. Panina;D. J. Mapps
  3. IEEE Trans. Magn v.34 L .V. Panina;K. Mohri;T. Uchiyama;M. Noda;K. Bushida
  4. IEEE Trans. Magn. v.28 K. Mohri;K. Kawashima;T. Kohzawa;Y. Yoshida;L. V. Panina
  5. Appl. Phys. Lett v.75 C. G. Kim;K. J. Jang;D. Y. Kim, S. S. Yoon
  6. J. Appl. Phys v.85 C. G. Kim;K. J. Jang;H. C. Kim;S. S. Yoon
  7. J. Appl. Phys v.85 S. S. Yoon;S. C. Yu;K. H. Ryu;C. G. Kim
  8. Appl. Phys. Lett v.77 C. G. Kim;K. J. Jang;D. Y. Kim;S. S. Yoon
  9. J. Magn. Magn. Mater. v.87 P. T. Squire
  10. J. Magn. Mag. Mater v.203 S. S. Yoon;C. G. Kim;H. C. Kim;K. J. Jang;K. S. Ryu
  11. Magnetic domains A. Hubert;R. Schafer
  12. Appl. Phys. Lett v.76 C. G. Kim;K. J. Jang;D. Y. Kim;S. S. Yoon