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000017872 084__ $$2WoS$$aPhysics, Applied
000017872 1001_ $$0P:(DE-HGF)0$$aGalanakis, I.$$b0
000017872 245__ $$aVariation of the magnetic properties of Ni2MnGa Heusler alloy upon tetragonalization: a first-principles study
000017872 260__ $$aBristol$$bIOP Publ.$$c2011
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000017872 440_0 $$03700$$aJournal of Physics D - Applied Physics$$v44$$x0022-3727$$y23
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000017872 520__ $$aWe study the influence of the tetragonalization occurring during the martensitic phase transition on the exchange interactions in Ni2MnGa Heusler alloy using first-principles calculations in conjunction with the frozen-magnon approximation. We show that the tetragonalization alters only the exchange constants characterizing the Mn-Mn interactions. Calculated Curie temperatures within the random-phase approximation are found to agree with experimental data. Moreover, we study the temperature dependence of the magnetization and the small deviation from the experimental data exactly at the temperature of the phase transition is discussed. Obtained results agree with previous theoretical results using Liechtenstein's formula to calculate the exchange constants and the Monte Carlo simulation technique to estimate the Curie temperature.
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000017872 7001_ $$0P:(DE-Juel1)VDB63896$$aSasioglu, E.$$b1$$uFZJ
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000017872 8567_ $$uhttp://dx.doi.org/10.1088/0022-3727/44/23/235001
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