Abstract
Magnetic properties and martensitic transformation of Pd2Mn1+x Sn1−x magnetic shape memory alloys have been investigated by first-principles calculations using the pseudopotentials plane wave method. The formation energy results indicate that the excess Mn atom tends to occupy the Sn site in Pd2MnSn alloy due to the lowest formation energy. It is found that the antiparallel MnSn−MnMn magnetic coupling for x = 0.25 and 0.5 is slightly more stable compared to the parallel coupling. The tetragonal distortion conserving volume shows that the cubic structures for x = 0 and 0.25 are more favorable in energy than the tetragonal phases, whereas the tetragonal structure for x = 0.5 is more stable, indicating that a martensitic transformation from austenite to martensite for x = 0.5 may happen at a lower temperature. Moreover, the martensitic transformation for x = 0.5 is closely related to the enhanced Pd−MnMn hybridization.
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This work was supported by the Fundamental Research Funds for the Central Universities (Grant No 2572014CB31), Heilongjiang Provincial Youth Science Foundation (Grant No. QC2013C006) and the National Natural Science Foundation of China (Grant Nos. 11374353 and 11404055).
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Chen, B.S., Li, Y.Z., Guan, X.Y. et al. First-Principles Study of Magnetic Properties and Martensitic Transformation of Pd − Mn − Sn Magnetic Shape Memory Alloys. J Supercond Nov Magn 28, 1639–1643 (2015). https://doi.org/10.1007/s10948-014-2937-x
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DOI: https://doi.org/10.1007/s10948-014-2937-x