| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Negative Thermal Expansion of the Dy$_{2}$Fe$_{16}$Cr Compound |
| Li-Yu HAO1, Tie YANG1**, Xiao-Tian WANG1, Ming TAN2** |
1School of Physical Science and Technology, Southwest University, Chongqing 400715
2College of Science, Henan Agricultural University, Zhengzhou 450002
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| Cite this article: |
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Li-Yu HAO, Tie YANG, Xiao-Tian WANG et al 2019 Chin. Phys. Lett. 36 066501 |
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Abstract Structural, thermal expansion, and magnetic properties of the Dy$_{2}$Fe$_{16}$Cr compound are investigated by means of x-ray diffraction and magnetization measurements. The Dy$_{2}$Fe$_{16}$Cr compound has a hexagonal Th$_{2}$Ni$_{17}$-type structure. There exists a negative thermal expansion resulting from a strong spontaneous magnetostriction in the magnetic state of the Dy$_{2}$Fe$_{16}$Cr compound. The average thermal expansion coefficient is $-0.794\times 10^{-5}$/K in the temperature range 292–407 K. The spontaneous magnetostrictive deformation and the Curie temperature are discussed.
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Received: 12 April 2019
Published: 18 May 2019
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| PACS: |
65.60.+a
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(Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.)
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75.80.+q
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(Magnetomechanical effects, magnetostriction)
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75.30.Et
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(Exchange and superexchange interactions)
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 50871074 and 61474082. |
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