Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10710549 | Journal of Magnetism and Magnetic Materials | 2005 | 6 Pages |
Abstract
New futures on the physical properties of ferromagnetic FeNi alloys have been found combining in situ neutron diffraction experiments and magnetic measurements in mechanical milled Fe-rich Fe-Ni metastable solid solutions. Apart from the well-known Invar effect, on heating these materials are characterised by the existence of a first-order martensite-austenite transformation that takes place at some system-dependent temperature. On cooling, the transformation occurs at a lower temperature than on heating; for Fe80Ni20 the size of the effect being larger than 100 °C, much more than the values found in conventional FeNi alloys. These results are discussed considering intrinsic features as magnetovolume effects and/or extrinsic effects such as small grain size and the existence of defects.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
P. Gorria, D. MartÃnez-Blanco, M.J. Pérez, J.A. Blanco, R.I. Smith,