Crystal structures and phase relationships in magnetostrictive Tb1-x Dy x Co2 system.
J Phys Condens Matter
; 32(13): 135802, 2020 Mar 27.
Article
en En
| MEDLINE
| ID: mdl-31778991
ABSTRACT
The crystal structures and phase relationships of Tb1-x Dy x Co2 alloys with 0 ⩽ x ⩽ 1 were investigated by synchrotron-based high-resolution x-ray powder diffraction. Three different crystal structures are observed in the system all the compositions show cubic structure with space group [Formula see text] at temperatures above the Curie temperature T C; the Tb-rich side sample shows a rhombohedral structure with space group [Formula see text] and the Dy-rich side sample has a tetragonal [Formula see text] space group. In situ measurements on the intermediate compound Tb0.3Dy0.7Co2 show a rhombohedral to tetragonal structural transition, and the two phases coexist from 99 K to 111 K, where the so-called magnetic morphotropic phase boundary (MPB) is found. The coexisting phases are believed to induce the anomalous magnetostrictive effect in the MPB regime.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Estados Unidos