Magnetism of Invar alloys under pressure examined by inelastic x-ray scattering
Abstract
The magnetic properties of the Invar alloy Fe64Ni36 have been investigated by x-ray emission spectroscopy as a function of pressure up to 20 GPa. With increasing pressure, the amplitude of the Fe local moment, deduced from the Fe Kβ line satellite intensity, is reduced at two characteristic step values. This pressure dependence is interpreted in terms of transitions from a high-spin state to a low-spin state at ~5 GPa followed by a transition to a nonmagnetic state above 15 GPa. This behavior provides a microscopic picture of the Fe magnetism in agreement with the 2γ-state model.
- Publication:
-
Physical Review B
- Pub Date:
- April 2001
- DOI:
- 10.1103/PhysRevB.63.132409
- Bibcode:
- 2001PhRvB..63m2409R
- Keywords:
-
- 62.50.+p;
- 78.70.En;
- 71.70.Ch;
- High-pressure and shock wave effects in solids and liquids;
- X-ray emission spectra and fluorescence;
- Crystal and ligand fields