Magnetic and Magnetostrictive Behaviors of Laves-Phase Rare-Earth—Transition-Metal Compounds Tb1−xDyxCo1.95

Materials

Yoshitaka Matsushita¹  Zhiyong Dai²  Chao Zhou²  Fanghua Tian²  Yin Zhang²  Yu Wang²  Liqun Wang²  Adil Murtaza²  Sen Yang²  Yuanliang Chen²  Kaili Li²  Wenliang Zuo² 

[1] National Institute for Materials Science, Tsukuba 305-0047, Ibaraki, Japan;School of Physics, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China;

关键词: morphotropic phase boundary;    magnetostriction;    Laves-phase;    temperature dependence;    composition dependence;   

DOI  :  10.3390/ma15113884

来源: DOAJ

【 摘 要 】

The magnetic morphotropic phase boundary (MPB) was first discovered in Laves-phase magnetoelastic system Tb–Dy–Co alloys (PRL 104, 197201 (2010)). However, the composition-dependent and temperature-dependent magnetostrictive behavior for this system, which is crucial to both practical application and the understanding of transitions across the MPB, is still lacking. In this work, the composition-dependence and temperature-dependence of magnetostriction for Tb_1−xDy_xCo_1.95 (x = 0.3~0.8) are presented. In a ferrimagnetic state (as selected 100 K in the present work), the near-MPB compositions x = 0.6 and 0.7, exhibit the largest saturation magnetization M_S and the lowest coercive field H_C; by contrast, the off-MPB composition x = 0.5, exhibits the largest magnetostriction, the lowest M_S, and the largest H_C. Besides, a sign change of magnetostriction is observed, which occurs with the magnetic transition across the MPB. Our results suggest the combining effect from the lattice strain induced from structure phase transition, and the influence of the MPB on magnetocrystalline anisotropy. This work may stimulate the research interests on the transition behavior around the MPB and its relationship with physical properties, and also provide guidance in designing high-performance magnetostrictive materials for practical applications.

【 授权许可】

Unknown