Anomalous magnetoelastic behaviour near morphotropic phase boundary in ferromagnetic Tb1-xNdxCo2 system

Murtaza, Adil; Yang, Sen; Zhou, Chao; Chang, Tieyan; Chen, Kaiyun; Tian, Fanghua; Song, Xiaoping; Suchomel, Matthrew R.; Ren, Y.

doi:10.1063/1.4960462

Anomalous magnetoelastic behaviour near morphotropic phase boundary in ferromagnetic Tb_1-xNd_xCo₂ system

Journal Article · Thu Aug 04 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4960462· OSTI ID:1373406

Murtaza, Adil ^[1]; Yang, Sen ^[1]; Zhou, Chao ^[1]; Chang, Tieyan ^[1]; Chen, Kaiyun ^[1]; Tian, Fanghua ^[1]; Song, Xiaoping ^[1]; Suchomel, Matthrew R. ^[2]; Ren, Y. ^[2]

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

In this study, we report a morphotropic phase boundary (MPB) involved ferromagnetic system Tb_1-xNd_xCo₂ and reveal the corresponding structural and magnetoelastic properties of this system. With high resolution synchrotron X-ray diffractometry, the crystal structure of the TbCo₂-rich side is detected to be rhombohedral and that of NdCo₂-rich side is tetragonal below their respective Curie temperatures T_C. The MPB composition Tb_0.35Nd_0.65Co₂ corresponds to the coexistence of the rhombohedral phase (R-phase) and tetragonal phase (T-phase). Contrary to previously reported MPB involved ferromagnetic systems, the MPB composition of Tb_0.35Nd_0.65Co₂ shows minimum magnetization which can be understood as compensation of sublattice moments between the R-phase and the T-phase. Furthermore, magnetostriction of Tb_1-xNd_xCo₂ decreases with increasing Nd concentration until x = 0.8 and then increases in the negative direction with further increasing Nd concentration; the optimum point for magnetoelastic properties lies towards the rhombohedral phase. Finally, our work not only shows an anomalous type of ferromagnetic MPB but also provides an effective way to design functional materials.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: National Basic Research Program of China (973 Program); National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1373406

Alternate ID(s):: OSTI ID: 22594327

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 109; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (1)

Crystal structures and phase relationships in magnetostrictive Tb _{1− x} Dy _x Co ₂ system Chang, Tieyan; Zhou, Chao; Mi, Jingwen Journal of Physics: Condensed Matter, Vol. 32, Issue 13 https://doi.org/10.1088/1361-648x/ab5cc9	journal	December 2019

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