Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Structural and Magnetic Properties of Fe50Cr50 Alloys Prepared by Mechanical Alloying Method

  • Yang, Dong-Seok (Department of Physics Education, Chungbuk National University) ;
  • Park, Ji-Yeon (Department of Physics Education, Chungbuk National University) ;
  • Yoo, Yong-Goo (Chungbuk Technopark, Regional Innovation Agency) ;
  • Kim, Kyeong-Sup (School of Electrical & Computer Engineering, CBNU BK21 Chungbuk Information Technology Center, Chungbuk National University) ;
  • Yu, Seong-Cho (BK21 Physics Program and Department of Physics, Chungbuk National University)
  • Received : 2010.04.30
  • Accepted : 2010.07.05
  • Published : 2010.09.30
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Abstract

Fe50Cr50 metastable alloys were prepared by the mechanical alloying method with milling periods of 1, 2, 4, 6, 12 and 24 hours, respectively. The structural evolution was analyzed by the extended x-ray absorption fine structure (EXAFS). In this work, the EXAFS analysis provided the local structural information around Fe central atom. The saturation magnetization was also measured by VSM. The magnetization decreased as the process mechanical alloying progressed. The magnetic property was related to the local structural variation as a function of processing time. The analysis showed that the diffusion Cr atoms into Fe clusters caused the reduction of magnetization. EXAFS analysis exhibited that the local ordering of magnetic atoms caused the magnetic ordering. Also, EXAFS analysis showed that the long range order of Fe atoms was destroyed completely in 24 hour milling.

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