Volume 80, Number 5, December 2007
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||30 October 2007|
Martensitic transition, ferrimagnetism and Fermi surface nesting in Mn2NiGa
UGC-DAE Consortium for Scientific Research - Indore, 452017, Madhya Pradesh, India
2 Raja Ramanna Centre for Advanced Technology - Indore, 452013, Madhya Pradesh, India
Accepted: 5 October 2007
The electronic structure of Mn2NiGa has been studied using density functional theory and photoemission spectroscopy. The lower-temperature tetragonal martensitic phase with = 1.25 is more stable compared to the higher-temperature austenitic phase. Mn2NiGa is ferrimagnetic in both phases. The calculated valence band spectrum, the optimized lattice constants and the magnetic moments are in good agreement with experiment. The majority-spin Fermi surface (FS) expands in the martensitic phase, while the minority-spin FS shrinks. FS nesting indicates occurrence of phonon softening and modulation in the martensitic phase.
PACS: 71.20.Be – Transition metals and alloys / 71.18.+y – Fermi surface: calculations and measurements; effective mass, g factor / 81.30.Kf – Martensitic transformations
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.