Phase field simulation of grain size effects on the phase coexistence and magnetostrictive behavior near the ferromagnetic morphotropic phase boundary

Cheng Chao Hu, Zhao Zhang, Tian Nan Yang, Yang Guang Shi, Xiao Xing Cheng, Jun Jie Ni, Ji Gong Hao, Wei Feng Rao, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The grain size effects on the phase coexistence and magnetostrictive response of Tb1-xDyxFe2 polycrystals near the ferromagnetic morphotropic phase boundary (MPB) are revealed through phase-field modeling. It shows that phase coexistence is a universal phenomenon in polycrystals for both ferromagnetic and ferroelectric MPB and that the range of compositions for phase coexistence increases with decreasing grain sizes. A large, reversible, and anhysteretic magnetostrictive response at low external fields is also found in the fine-grained polycrystals around the ferromagnetic MPB, which offers us a route to developing nanocrystalline magnetostrictive materials.

Original languageEnglish (US)
Article number162402
JournalApplied Physics Letters
Volume115
Issue number16
DOIs
StatePublished - Oct 14 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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