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

Title: 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.

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

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

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1373406

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

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

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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