Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

作者：Maniraj M^*; D'Souza S W; Rai Abhishek; Schlagel D L; Lograsso T A; Chakrabarti Aparna; Barman S R

来源：Solid State Communications, 2015, 222: 1-4.

DOI：10.1016/j.ssc.2015.08.003

• Ferromagnetic shape memory alloy
• Martensite transition
• Inverse photoemission spectroscopy
• Korriga-Kohn-Rostoker method

Momentum resolved inverse photoemission spectroscopy measurements show that the dispersion of the unoccupied bands of Ni(2)MaGa is significant in the austenite phase. In the martensite phase, it is markedly reduced, which is possibly related to the structural transition to an incommensurate modulated state in the martensite phase. Based on the first principle calculations of the electronic structure of Ni-Mn-Ga, we show that the modification of the spectral shape with surface composition is related to change in the hybridization between the Mn 3d and Ni 3d-like states that dominate the unoccupied conduction band.

• 出版日期2015-11