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2009 | 115 | 1 | 360-362
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Electric and Magnetic Signatures of Structural and Chemical Ordering of Heusler Alloy Films

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We present results of in situ temperature measurements of resistivity for some amorphous or partially crystalline Heusler alloy films: Co_{2}CrAl, Co_{2}MnGa and off-stoichiometric Ni_{2}Mn_{1+x}Sn_{x}, Ni_{2}Mn_{1-x}Ga_{x} that are known to exhibit half-metallic properties and martensitic transformations, respectively. From ρ vs. T characteristics we distinguish various stages of chemical and structural ordering in the films. They appear to be quite distinct in both systems investigated. The resistivity results are compared with magnetic characteristics for Co_{2}MnGa with a high Curie temperature.
  • Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
  • Department of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
  • Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
  • Institute of Metal Physics, National Academy of Sciences of Ukraine, 252680, Kiev-142, Ukraine
  • q-psi and Department of Physics, Hanyang University, Seoul, 133-791 Korea
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