Crystal structures and phase relationships in magnetostrictive Tb1-xDyxCo2 system

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Tieyan Chang
  • Chao Zhou
  • Jingwen Mi
  • Kaiyun Chen
  • Fanghua Tian
  • Yu-Sheng Chen
  • SuYin Grass Wang
  • Dennis E Brown
  • Xiaoping Song
  • Sen Yang

Detail(s)

Original languageEnglish
Article number135802
Journal / PublicationJournal of Physics Condensed Matter
Volume32
Issue number13
Online published30 Dec 2019
Publication statusPublished - 27 Mar 2020
Externally publishedYes

Abstract

The crystal structures and phase relationships of Tb1-xDyxCo2 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  Fd¯3m at temperatures above the Curie temperature TC; the Tb-rich side sample shows a rhombohedral structure with space group R¯3m the Dy-rich side sample has a tetragonal I41/amd 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.

Research Area(s)

  • Crystal structure, Laves phase, Mpb, Rietveld, Synchrotron

Citation Format(s)

Crystal structures and phase relationships in magnetostrictive Tb1-xDyxCo2 system. / Chang, Tieyan; Zhou, Chao; Mi, Jingwen; Chen, Kaiyun; Tian, Fanghua; Chen, Yu-Sheng; Wang, SuYin Grass; Ren, Yang; Brown, Dennis E; Song, Xiaoping; Yang, Sen.

In: Journal of Physics Condensed Matter, Vol. 32, No. 13, 135802, 27.03.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review