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Enhanced magnetoelastic performance in Pr/Mn-doped Laves phase (Tb,Ho)Fe2 compounds Cover

Enhanced magnetoelastic performance in Pr/Mn-doped Laves phase (Tb,Ho)Fe2 compounds

By: M.K. Wang,  J.J. Liu,  X.J. Lv,  Q.L. Ding,  F. Li,  Z.B. Pan,  W.X. Xia and  J. Du  
Open Access
|Apr 2021

Abstract

Magnetostrictive TbxHo0:8−xPr0:2Fe1:8Mn0:1 (0 ⩽ x ⩽ 0.20) alloys are prepared by arc-melting and subsequent annealing. The dopant of Pr/Mn introduced into RFe2 compounds effectively stabilizes the forming of single C15 Laves phase at ambient pressure. The easy magnetization direction (EMD) varies when Tb content increases, which is accompanied by a crystalstructural transition. EMD lies along ‹1 0 0› axis for x ⩽ 0.05, rotating to ‹1 1 1› axis for x ⩽ 0.12, with a tetragonal symmetry changing to a rhombohedral one. Magnetocrystalline-anisotropy compensation is obtained with the optimized composition of x = 0.12, shifting to the Tb-poor side in comparison to Pr/Mn-free counterpart. An enhanced effect on magnetoelastic properties is achieved in Tb0:12Ho0:68Pr0:2Fe1:8Mn0:1, which simultaneously possesses a low anisotropy and high magnetostriction performance, i.e. λs ~ 420 ppm, λ111 ~ 970 ppm, and a large low-field λa ~ 390 ppm/2 kOe, being 30 % higher than that of Pr/Mn-free compound. Combining low-cost light rare earth Pr with the lower Tb content, Tb0:12Ho0:68Pr0:2Fe1:8Mn0:1 may make it promising solution in magnetostrictive applications.

DOI: https://doi.org/10.2478/msp-2020-0084 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
Language: English
Page range: 707 - 714
Submitted on: Sep 3, 2020
Accepted on: Dec 22, 2020
Published on: Apr 13, 2021
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2021 M.K. Wang, J.J. Liu, X.J. Lv, Q.L. Ding, F. Li, Z.B. Pan, W.X. Xia, J. Du, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.