Electronic Structure and Lattice Dynamics of the Magnetic Shape Memory Alloy Co2NiGa
In addition to the prototypical Ni-Mn-based Heusler alloys, the Co-Ni-Ga systems have recently been suggested as another prospective materials class for magnetic shape-memory applications. We provide a characterization of the dynamical properties of this material and their relation to the electronic structure within a combined experimental and theoretical approach. This relies on inelastic neutron scattering to obtain the phonon dispersion while first-principles calculations provide the link between dynamical properties and electronic structure. In contrast to Ni{sub 2}MnGa, where the softening of the TA{sub 2} phonon branch is related to Fermi-surface nesting, our results reveal that the respective anomalies are absent in Co-Ni-Ga, in the phonon dispersions as well as in the electronic structure.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- DOE - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1000437
- Report Number(s):
- BNL-91279-2010-JA; ISSN 1550-235X; R&D Project: PO-010; KC0202010; TRN: US201101%%314
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 6; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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