Abstract
The temperature dependence of the phonon frequencies in ferromagnetic BCC iron is discussed using nearest- and second-nearest-neighbour force constants, which are evaluated from elastic moduli obtained previously by the spin-fluctuation theory with the tight-binding model. The simple calculation accounts semi-quantitatively for the essential features in the observed phonon spectrum. In particular, the marked softening of the transverse (110) T1 mode is shown to be due to the softening in the second-nearest-neighbour force constant arising from the magnetic band Jahn-Teller effect.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
