| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Negative Thermal Expansion and Spontaneous Magnetostriction of Nd$_{2}$Fe$_{16.5}$Cr$_{0.5}$ Compound |
| Li-Yu HAO1, Tie Yang1**, Ming Tan2** |
1School of Physics 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, Ming Tan 2020 Chin. Phys. Lett. 37 016501 |
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Abstract The structural, thermal expansion, and magnetic properties of the Nd$_{2}$Fe$_{16.5}$Cr$_{0.5}$ compound are investigated by means of x-ray diffraction and magnetization measurements. The Nd$_{2}$Fe$_{16.5}$Cr$_{0.5}$ compound has a rhombohedral Th$_{2}$Zn$_{17}$-type structure. There exists a small negative thermal expansion resulting from a spontaneous magnetostriction in the magnetic state of the Nd$_{2}$Fe$_{16.5}$Cr$_{0.5}$ compound. The average thermal expansion coefficient is $-1.06\times 10^{-6}$/K in a temperature range 299–394 K. The spontaneous magnetostrictive deformation and the Curie temperature are discussed.
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Received: 24 September 2019
Published: 23 December 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, the Henan Agricultural University Start-up under Grant No 20190703Y00005. |
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