TY  - JOUR
AU  - Galanakis, I.
AU  - Sasioglu, E.
TI  - Variation of the magnetic properties of Ni2MnGa Heusler alloy upon tetragonalization: a first-principles study
JO  - Journal of physics / D
VL  - 44
SN  - 0022-3727
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-17872
SP  - 235001
PY  - 2011
N1  - Record converted from VDB: 12.11.2012
AB  - We 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000290911400005
DO  - DOI:10.1088/0022-3727/44/23/235001
UR  - https://juser.fz-juelich.de/record/17872
ER  -