A calculation of elastic constants of ferromagnetic iron at finite temperatures
- 1 January 1985
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 15 (1) , 19-34
- https://doi.org/10.1088/0305-4608/15/1/007
Abstract
The temperature dependence of the elastic constants C'=1/2(C11-C12),C44 and B of BCC iron is calculated within the tight-binding approximation using the single-site spin-fluctuation theory of band magnetism. The theory reproduces the observed anomalous 'softening' of the tetragonal shear constant C', relating it to the contribution of the eg orbitals. The negative slope with temperature of the trigonal shear constant C44 and bulk modulus B is shown to arise from the lattice expansion. The influence of magnetic moments on the elastic constants of ferromagnetic and antiferromagnetic, BCC transition metals is discussed in general.Keywords
This publication has 51 references indexed in Scilit:
- The role of magnetism in the calculation of phase diagramsPublished by Elsevier ,2002
- Interatomic Forces and Phonon Anomalies in bccTransition MetalsPhysical Review Letters, 1984
- Influence of shear strains on the electronic structure of vanadiumJournal of Physics F: Metal Physics, 1983
- Electron-phonon interaction and itinerant-electron ferromagnetismPhysical Review B, 1982
- HIGH TEMPERATURE PHONONS IN IRONLe Journal de Physique Colloques, 1981
- On the martensitic transformation in f. c. c. manganese alloys. I. MeasurementsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1981
- Elastic constants in Nb-Zr alloys from zero temperature to the melting point: Experiment and theoryPhysical Review B, 1978
- Ultrasonic Propagation and Structural Instabilities in Itinerant-Electron FerromagnetsPhysical Review Letters, 1977
- Acoustic-Phonon Softening in the Invar AlloyPtPhysical Review Letters, 1976
- Theory of Itinerant Ferromagnets Exhibiting Localized-Moment Behavior above the Curie PointPhysical Review Letters, 1969