Spin reorientation and magnetoelastic properties of ferromagnetic Tb1-xNdxCo2 systems with a morphotropic phase boundary

Murtaza, Adil; Yang, Sen; Chang, Tieyan; Ghani, Awais; Khan, Muhammad Tahir; Zhang, Rui; Zhou, Chao; Song, Xiaoping; Suchomel, Matthew; Ren, Yang

doi:10.1103/PhysRevB.97.104410

Title: Spin reorientation and magnetoelastic properties of ferromagnetic $T b_{1 - x} N d_{x} C o_{2}$ systems with a morphotropic phase boundary

Journal Article · 15 March 2018 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.97.104410 · OSTI ID:1481168

Murtaza, Adil ^[1]; Yang, Sen ^[1]; Chang, Tieyan ^[1]; Ghani, Awais ^[1]; Khan, Muhammad Tahir ^[1]; Zhang, Rui ^[1]; Zhou, Chao ^[1]; Song, Xiaoping ^[1]; Suchomel, Matthew ^[2]; Ren, Yang ^[2]

Xi'an Jiaotong Univ., Xi'an (China)
Argonne National Lab. (ANL), Argonne, IL (United States)

The spin reorientation (SR) and magnetoelastic properties of pseudobinary ferromagnetic Tb_1–xNd_xCo₂ (0 ≤ x ≤ 1.0) systems involving a morphotropic phase boundary (MPB) were studied by high-resolution synchrotron x-ray diffraction (XRD), magnetization, and magnetostriction measurements. The easy magnetization direction of the Laves phase lies along the < 111 > axis with x < 0.65, whereas it lies along the < 100 > axis for x > 0.65 below Curie temperature (TC). The temperature-dependent magnetization curves showed SR; this can be explained by a two-sublattice model. Based on the synchrotron (XRD) and magnetization measurements, the SR phase diagram for a MPB composition of Tb_0.35Nd_0.65Co₂ was obtained. Contrary to previously reported ferromagnetic systems involving MPB, the MPB composition of Tb_0.35Nd_0.65Co₂ exhibits a low saturation magnetization (MS), indicating a compensation of the Tb and Nd magnetic moments at MPB. The anisotropic magnetostriction (λS) first decreased until x = 0.8 and then continuously increased in the negative direction with further increase of Nd concentration. The decrease in magnetostriction can be attributed to the decrease of spontaneous magnetostriction λ₁₁₁ and increase of λ₁₀₀ with opposite sign to λ₁₁₁. In conclusion, this paper indicates an anomalous type of MPB in the ferromagnetic Tb_1–xNd_xCo₂ system and provides an active way to design novel functional materials with exotic properties.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1481168

Alternate ID(s):: OSTI ID: 1426330

Journal Information:: Physical Review B, Vol. 97, Issue 10; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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