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Effects of Fe and Co addition on the magnetoresistance in Ni-Mn-Ga films

  • K. KoikeEmail author
  • M. Ohtsuka
  • M. Matsumoto
  • Y. Adachi
  • T. Takagi
  • H. Kato
Article
  • 87 Downloads

Abstract.

Effects of Fe and Co addition on the magnetoresistance MR were investigated in sputtered Ni-Mn-Ga-M (M = Fe, Co) films. With increasing M content, magnetization σ enhanced for M = Fe, while it reduced for M = Co. At 300 K, absolute MR value at 1.5 T |MR|1.5 was about 1%. The value of |MR|1.5 was found to be decreased with increasing M = Fe content. In the case of M = Co, |MR|1.5 increased with M content. |MR|1.5 of the film containing Co 1.6 at.% showed a maximum value of 2.5% at 355 K in the vicinity of the Curie temperature TC. An origin of MR behavior in the present films was suggested to be explained by a s-d scattering model.

Keywords

Curie Temperature Martensitic Transformation European Physical Journal Special Topic Martensitic Transformation Temperature Reverse Martensitic Transformation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Authors and Affiliations

  • K. Koike
    • 1
    Email author
  • M. Ohtsuka
    • 2
  • M. Matsumoto
    • 3
  • Y. Adachi
    • 1
  • T. Takagi
    • 3
  • H. Kato
    • 1
    • 4
  1. 1.Graduate School of Science and Engineering, Yamagata UniversityYamagataJapan
  2. 2.Institute of Multidisciplinary Research for Advanced Materials, Tohoku UniversityMiyagiJapan
  3. 3.Institute of Fluid Science, Tohoku UniversityMiyagiJapan
  4. 4.New Industry Creation Hatchery Center, Tohoku UniversityMiyagiJapan

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