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Title: Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

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.
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. UGC-DAE Consortium for Scientific Research, Madhya Pradesh (India)
  2. Ames Lab., Ames, IA (United States)
  3. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  4. Raja Ramanna Centre for Advanced Technology, Madhya Pradesh (India)
Publication Date:
OSTI Identifier:
Report Number(s):
IS--J 8801
Journal ID: ISSN 0038-1098; PII: S0038109815002781
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Solid State Communications
Additional Journal Information:
Journal Volume: 222; Journal Issue: C; Journal ID: ISSN 0038-1098
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
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