Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1516990 | Journal of Physics and Chemistry of Solids | 2010 | 5 Pages |
Abstract
Ni–Mn–Ga nanoparticles were prepared by ball milling technique. X-ray diffraction pattern of the milled powders has a broad peak near the location of the prominent peak for the Heusler phase of Ni2MnGa, indicating very disordered structures with small particle sizes. Structural properties of milled Ni–Mn–Ga particles recover to those of the bulk state after appropriate annealing temperature. It is worth noting that particles with size above 50 nm exhibit martensitic transformation. The average internal stress was calculated to be 2.83–1.13 MPa stored in the distorted lattice. Saturation magnetization of the milled sample increases with annealing temperature due to re-crystallization and grain growth.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
K. Vallal Peruman, M. Mahendran, S. Seenithurai, R. Chokkalingam, R.K. Singh, V. Chandrasekaran,