Giant Magnetoresistance of Mechanically Alloyed Fe7.5 Co22.5 Ag70 Mixed with Hard Magnetic Material

Authors

  • Chitnarong Sirisathitkul Institute of Science, Walailak University, Thasala Nakon Si Thammarat 80160, Thailand.
  • John Gregg Clarendon Laboratory, University of Oxford, United Kingdom.
  • Neil Cohen University College, University of London, United Kingdom.

Keywords:

spin giant magnetoresistance, mechanical alloy, ball milling, single domain particles, dependent scattering

Abstract

Giant magnetoresistive Fe7.5Co22.5Ag70 was alloyed by ball milling for 60 hours. Subsequently, samarium-cobalt (5% by weight) was added to the alloy and the milling continued for another 15 minutes. The inclusion of hard magnetic SmCo5 was evidently not detriment to giant magnetoresistance (GMR). At room temperature, the bulk mechanical alloy exhibited coercivity of 500 Oe and 1.4 % GMR with modest anisotropic magnetoresistance. GMR increased linearly with decreasing temperature from 300 K to 143 K because the alloy’s resistance decreased at low temperature. Significant relaxation time of magnetic moments was observed in magnetoresistance curves as a lag of resistance change behind the field change.

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Published

2002-06-30

How to Cite

Chitnarong Sirisathitkul, John Gregg, and Neil Cohen. 2002. “Giant Magnetoresistance of Mechanically Alloyed Fe7.5 Co22.5 Ag70 Mixed With Hard Magnetic Material”. Agriculture and Natural Resources 36 (2). Bangkok, Thailand:200-205. https://li01.tci-thaijo.org/index.php/anres/article/view/242712.

Issue

Vol. 36 No. 2 (2002): April-June

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.