Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

Maniraj, M.; D׳Souza, S. W.; Rai, Abhishek; Schlagel, D. L.; Lograsso, T. A.; Chakrabarti, Aparna; Barman, S. R.

doi:10.1016/j.ssc.2015.08.003

Title: Unoccupied electronic structure of Ni₂MnGa ferromagnetic shape memory alloy

Journal Article · Thu Aug 20 00:00:00 EDT 2015 · Solid State Communications

DOI:https://doi.org/10.1016/j.ssc.2015.08.003· OSTI ID:1235239

Maniraj, M. ^[1]; D׳Souza, S. W. ^[1]; Rai, Abhishek ^[1]; Schlagel, D. L. ^[2]; Lograsso, T. A. ^[3]; Chakrabarti, Aparna ^[4]; Barman, S. R. ^[1]

UGC-DAE Consortium for Scientific Research, Madhya Pradesh (India)
Ames Lab., Ames, IA (United States)
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Raja Ramanna Centre for Advanced Technology, Madhya Pradesh (India)

Momentum resolved inverse photoemission spectroscopy measurements show that the dispersion of the unoccupied bands of Ni₂MnGa is significant in the austenite phase. Furthermore, 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. Finally, 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.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1235239

Alternate ID(s):: OSTI ID: 1245219

Report Number(s):: IS-J 8801; PII: S0038109815002781

Journal Information:: Solid State Communications, Vol. 222, Issue C; ISSN 0038-1098

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
A.Ferromagnetic shape memory alloy
D. Martensite transition
E. Inverse photoemission spectroscopy
E. Korriga-Kohn-Rostoker method

Title: Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

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Title: Unoccupied electronic structure of Ni₂MnGa ferromagnetic shape memory alloy