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Impact of Co and Fe Doping on the Martensitic Transformation and the Magnetic Properties in Ni‐Mn‐Based Heusler Alloys
Author(s) -
Dutta Biswanath,
Körmann Fritz,
Hickel Tilmann,
Neugebauer Jörg
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700455
Subject(s) - diffusionless transformation , magnetic refrigeration , materials science , austenite , martensite , alloy , doping , magnetic shape memory alloy , condensed matter physics , magnetic moment , ground state , metallurgy , magnetic field , magnetization , magnetic domain , microstructure , atomic physics , optoelectronics , physics , quantum mechanics
Doping with Co and Fe is a promising strategy to enhance the performance of Ni‐Mn‐based magnetocaloric materials. We investigate here the impact of these two elements on the magnetic properties and the martensitic transformations in Mn‐rich Ni‐Mn‐Al Heusler alloy. Based on ab initio ground‐state energies, we explain the martensitic transformation temperatures in these alloys. The magnetic ground states of the austenite and the martensite phases are discussed on the basis of magnetic exchange parameters. A thorough comparison of the transition temperatures and the change in saturation moments during martensitic transformation brings into light the relative potential of the two substitutional elements for future applications.