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Title: Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

Abstract

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.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [1]
+ Show Author Affiliations
  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:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1235239
Alternate Identifier(s):
OSTI ID: 1245219
Report Number(s):
IS-J 8801
Journal ID: ISSN 0038-1098; PII: S0038109815002781
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Solid State Communications
Additional Journal Information:
Journal Volume: 222; Journal Issue: C; Journal ID: ISSN 0038-1098
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Maniraj, M., D׳Souza, S. W., Rai, Abhishek, Schlagel, D. L., Lograsso, T. A., Chakrabarti, Aparna, and Barman, S. R. Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy. United States: N. p., 2015. Web. doi:10.1016/j.ssc.2015.08.003.
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Maniraj, M., D׳Souza, S. W., Rai, Abhishek, Schlagel, D. L., Lograsso, T. A., Chakrabarti, Aparna, & Barman, S. R. Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy. United States. https://doi.org/10.1016/j.ssc.2015.08.003
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Maniraj, M., D׳Souza, S. W., Rai, Abhishek, Schlagel, D. L., Lograsso, T. A., Chakrabarti, Aparna, and Barman, S. R. Thu . "Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy". United States. https://doi.org/10.1016/j.ssc.2015.08.003. https://www.osti.gov/servlets/purl/1235239.
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@article{osti_1235239,
title = {Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy},
author = {Maniraj, M. and D׳Souza, S. W. and Rai, Abhishek and Schlagel, D. L. and Lograsso, T. A. and Chakrabarti, Aparna and Barman, S. R.},
abstractNote = {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.},
doi = {10.1016/j.ssc.2015.08.003},
journal = {Solid State Communications},
number = C,
volume = 222,
place = {United States},
year = {Thu Aug 20 00:00:00 EDT 2015},
month = {Thu Aug 20 00:00:00 EDT 2015}
}
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https://doi.org/10.1016/j.ssc.2015.08.003
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