Hostname: page-component-84c44f86f4-t57w2 Total loading time: 0 Render date: 2025-10-14T14:26:52.271Z Has data issue: false hasContentIssue false
  • English
  • Français

Granular Magnetism

Published online by Cambridge University Press:  28 February 2011

C.L. Chien
C.L. Chien*
Affiliation:
Department of Physics & Astronomy, The Johns Hopkins University, Baltimore Maryland 21218
Get access

Abstract

Recent studies of granular magnetic solids involving Fe and its alloys embedded in either an insulating medium (e.g. SiO2 A12O3) or a metallic medium are described. Below the percolation threshold, isolated magnetic granular exhibit single-domain properties and superparamagnetic relaxation. Giant coercivity has been uncovered in granular Fe-SiO2, with Hc- as high as 3 kOe at 5 K and 1.1 kOe at 300 K. Some recent results on granular Fe in a metallic medium, and other granular magnetic systems will also be discussed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 411
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1. Abeles, B., in Applied Solid State Science: Advances in Materials and Device Research, eds. Wolfe, R. (Academic, New York, 1976). P.1 Google Scholar
2. Abeles, B., Sheng, P., Couts, M.D. and Arie, Y., Adv. Phys. 24 407 (1975).Google Scholar
3.See e.g. Morrish, A.H., Physical Principles of Magnetism (Wiley, New York 1965).Google Scholar
4. Jacobs, I.S. and Bean, C.P., in Magnetism III, edited by Rado, G.T. and Suhl, H. (Academic, New York, 1963) p. 275.Google Scholar
5. Goldstein, Y. and Gittleman, J.L., Solid State Commn. 9, 1197 (1971).Google Scholar
6. Gittleman, J.L., Goldstein, Y. and Bozowski, S., Phys. Rev. B5, 3609 (1972).Google Scholar
7. Gittleman, J.L., Abeles, B. and Bozowski, S., Phys. Rev. B9, 3891 (1974).Google Scholar
8. Morup, S., Topsoe, H. and Clausen, B.S., Phys. Scr. 25, 713 (1982).Google Scholar
9. Xiao, G., Liou, S.H., Levy, A., Taylor, J.N. and Chien, C.L., Phys. Rev. B34, 7573 (1986).Google Scholar
10. Dormann, J.L., Tholence, J.L., Bessais, L. and Villers, D., J. Magn. Magn. Mater. 54–57, 173 (1986).Google Scholar
11. Gavrin, A. and Chien, C.L. J. Appl. Phys. 67, 938 (1990).Google Scholar
12. Kneller, E.F. and Luborsky, F.E., J. Appl. Phys. 34, 656 (1963).Google Scholar
13. Xiao, G. and Chien, C.L., Appl. Phys. Lett. 51, 1280 (1987).Google Scholar
14. Xiao, G. and Chien, C.L., J. Appl. Phys. 63, 4252 (1988).Google Scholar
15. Liou, S.H. and Chien, C.L., J. Appl. Phys. 63, 4240 (1988).Google Scholar
16.See e.g. Kryder, M.H. and Bortz, A.B., Physics Today, 37,20 (1984).Google Scholar
17. Maloney, W.T., IEEE Trans. Magn. MAG–17, 3196 (1981).Google Scholar
18. Bate, G., J. Appl. Phys. 52, 2447 (1981).Google Scholar
19. Liou, S.H., Chien, C.L., Appl. Phys. Lett. 52 512 (1988).Google Scholar
20. Childress, J.R., Chien, C.L., Appl. Phys. Lett. 56 95(1990).Google Scholar
21. Chien, C.L., Liou, S.H., Kofalt, D., Yu, W., Egami, T., and McGuire, T.R., Phys. Rev. B33 3247 (1986).Google Scholar
22. Kenning, G.G., Slanghter, J.M. and Cowan, J.A., Phys. Rev. Lett. 59 2596 (1987).Google Scholar
23. Gavrin, A., Childress, J.R., Chien, C.L., Martinez, B. and Salamon, M.B., Phys. Rev. Lett. 64, 2438 (1990).Google Scholar