Volume 14, Issue 1 (Iranian Journal of Physics Research, spring 2014)                   IJPR 2014, 14(1): 26-31 | Back to browse issues page

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Hakimi, Khajeh Aminian. Effect of extra nonmagnetic Ga atoms on lattice ordering and magnetic properties of Fe2CoGa and Co2FeGa Heusler compounds. IJPR. 2014; 14 (1) :26-31
URL: http://ijpr.iut.ac.ir/article-1-1522-en.html
Experimental Condensed Matter Physics Group, Physics Department, Yazd University, Yazd , hakimi.m@yazd.ac.ir
Abstract:   (7028 Views)
Arc-melting with ball milling was used for preparing Fe2CoGa1+x and Co2FeGa1+x (x=0,0.2) Heusler samples. Effect of extra nonmagnetic Ga atoms on lattice ordering and magnetic properties of Fe2CoGa and Co2FeGa Heusler compounds was studied. Rietveld refinement showed that lattice parameter of the samples increases in the presence of extra Ga atoms. Results showed that Co2FeGa1.2 has a partial lattice disordering. Saturation magnetization of Co2FeGa sample was lower than Slater – Paulig prediction due to the crystallite size on a scale of nanometer. Reduction of saturation magnetization by increasing Ga atoms was explained through the change of lattice parameter, lattice ordering, and crystallite size. Saturation magnetization of Fe2CoGa sample was greater than Slater – Paulig value. Change of lattice parameter by increasing Ga atoms resulted a decrease of saturation magnetization in Fe2CoGa1.2
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Type of Study: Research | Subject: General

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