Thermal Expansion and Magnetostriction of Laves-Phase Alloys: Fingerprints of Ferrimagnetic Phase Transitions

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ID: 267401
2019
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Abstract
The magneto–elastic coupling effect correlates to the changes of moment and lattice upon magnetic phase transition. Here, we report that, in the pseudo-binary Laves-phase Tb1-xDyxCo2 system (x = 0.0, 0.7, and 1.0), thermal expansion and magnetostriction can probe the ferrimagnetic transitions from cubic to rhombohedral phase (in TbCo2), from cubic to tetragonal phase (in DyCo2), and from cubic to rhombohedral then to tetragonal phase (in Tb0.3Dy0.7Co2). Furthermore, a Landau polynomial approach is employed to qualitatively investigate the thermal expansion upon the paramagnetic (cubic) to ferrimagnetic (rhombohedral or tetragonal) transition, and the calculated thermal expansion curves agree with the experimental curves. Our work illustrates the correlation between crystal symmetry, magnetostriction, and thermal expansion in ferrimagnetic Laves-phase alloys and provides a new perspective to investigate ferrimagnetic transitions.
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zhou2019materialsthermal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chao Zhou;Huixin Bao;Yoshitaka Matsushita;Tieyan Chang;Kaiyun Chen;Yin Zhang;Fanghua Tian;Wenliang Zuo;Xiaoping Song;Sen Yang;Yang Ren;Xiaobing Ren;Zhou, Chao;Bao, Huixin;Matsushita, Yoshitaka;Chang, Tieyan;Chen, Kaiyun;Zhang, Yin;Tian, Fanghua;Zuo, Wenliang;Song, Xiaoping;Yang, Sen;Ren, Yang;Ren, Xiaobing;
Journal Materials (Basel, Switzerland)
Year 2019
DOI
10.3390/ma12111755
URL
https://doi.org/10.3390/ma12111755
Keywords
thermal expansion magnetostriction ferrimagnetic transition laves-phase alloy

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