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

被引：15

作者：

Hu, Cheng-Chao ^{[1
,2
]}

Zhang, Zhao ^{[1
]}

Yang, Tian-Nan ^{[2
]}

Shi, Yang-Guang ^{[3
]}

Cheng, Xiao-Xing ^{[2
]}

Ni, Jun-Jie ^{[1
]}

Hao, Ji-Gong ^{[1
]}

Rao, Wei-Feng ^{[4
]}

Chen, Long-Qing ^{[2
]}

机构：

[1] Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Shandong, Peoples R China

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[3] Nanjing Univ Aeronaut & Astronaut, Dept Appl Phys, Nanjing 210016, Peoples R China

[4] Qilu Univ Technol, Shandong Acad Sci, Sch Mech & Automot Engn, Dept Mat Proc, Jinan 250353, Shandong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 16期

基金：

美国国家科学基金会;

关键词：

MAGNETIC-ANISOTROPY; DOMAIN-STRUCTURES; TRANSFORMATIONS; STRAIN;

D O I：

10.1063/1.5118927

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. Published under license by AIP Publishing.

引用

页数：4

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