Low-field large magnetostriction in DyCo2 due to field-induced rearrangement of tetragonal variants

Zhihua Nie; Sen Yang; Yandong Wang; Zilong Wang; Dongmei Liu; Yang Ren

doi:10.1063/1.4821103

Low-field large magnetostriction in DyCo₂ due to field-induced rearrangement of tetragonal variants

Zhihua Nie, Sen Yang, Yandong Wang, Zilong Wang, Dongmei Liu, Yang Ren

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

15 Citations (Scopus)

Abstract

The synchrotron high-energy x-ray diffraction was used to trace directly the structural evolution of polycrystalline DyCo₂, one of RT ₂ (R = rare earth, T = Co, Fe) compounds with Laves phase, as a function of temperature and magnetic field. When the DyCo₂ compound was zero-field cooled down below T_C, the high temperature cubic lattice was distorted into tetragonal structure, associated with an expansion of unit cell volume. It was further found that the large magnetostriction at low magnetic field was due to the preferential rearrangement of tetragonal variants in the low-temperature ferrimagnetic phase. Our finding of the field-driven preferential selection of tetragonal variants in the polycrystalline materials provides important clues for exploring the advanced ferromagnetic alloys with a large magnetostriction at low field. © 2013 AIP Publishing LLC.

Original language	English
Article number	111903
Journal	Applied Physics Letters
Volume	103
Issue number	11
DOIs	https://doi.org/10.1063/1.4821103
Publication status	Published - 9 Sept 2013
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Low-field large magnetostriction in DyCo2 due to field-induced rearrangement of tetragonal variants",

abstract = "The synchrotron high-energy x-ray diffraction was used to trace directly the structural evolution of polycrystalline DyCo2, one of RT 2 (R = rare earth, T = Co, Fe) compounds with Laves phase, as a function of temperature and magnetic field. When the DyCo2 compound was zero-field cooled down below TC, the high temperature cubic lattice was distorted into tetragonal structure, associated with an expansion of unit cell volume. It was further found that the large magnetostriction at low magnetic field was due to the preferential rearrangement of tetragonal variants in the low-temperature ferrimagnetic phase. Our finding of the field-driven preferential selection of tetragonal variants in the polycrystalline materials provides important clues for exploring the advanced ferromagnetic alloys with a large magnetostriction at low field. {\textcopyright} 2013 AIP Publishing LLC.",

author = "Zhihua Nie and Sen Yang and Yandong Wang and Zilong Wang and Dongmei Liu and Yang Ren",

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T1 - Low-field large magnetostriction in DyCo2 due to field-induced rearrangement of tetragonal variants

AU - Nie, Zhihua

AU - Yang, Sen

AU - Wang, Yandong

AU - Wang, Zilong

AU - Liu, Dongmei

AU - Ren, Yang

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013/9/9

Y1 - 2013/9/9

N2 - The synchrotron high-energy x-ray diffraction was used to trace directly the structural evolution of polycrystalline DyCo2, one of RT 2 (R = rare earth, T = Co, Fe) compounds with Laves phase, as a function of temperature and magnetic field. When the DyCo2 compound was zero-field cooled down below TC, the high temperature cubic lattice was distorted into tetragonal structure, associated with an expansion of unit cell volume. It was further found that the large magnetostriction at low magnetic field was due to the preferential rearrangement of tetragonal variants in the low-temperature ferrimagnetic phase. Our finding of the field-driven preferential selection of tetragonal variants in the polycrystalline materials provides important clues for exploring the advanced ferromagnetic alloys with a large magnetostriction at low field. © 2013 AIP Publishing LLC.

AB - The synchrotron high-energy x-ray diffraction was used to trace directly the structural evolution of polycrystalline DyCo2, one of RT 2 (R = rare earth, T = Co, Fe) compounds with Laves phase, as a function of temperature and magnetic field. When the DyCo2 compound was zero-field cooled down below TC, the high temperature cubic lattice was distorted into tetragonal structure, associated with an expansion of unit cell volume. It was further found that the large magnetostriction at low magnetic field was due to the preferential rearrangement of tetragonal variants in the low-temperature ferrimagnetic phase. Our finding of the field-driven preferential selection of tetragonal variants in the polycrystalline materials provides important clues for exploring the advanced ferromagnetic alloys with a large magnetostriction at low field. © 2013 AIP Publishing LLC.

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DO - 10.1063/1.4821103

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JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 111903

ER -