| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Physical Properties of Half-Heusler Antiferromagnet MnPtSn Single Crystal |
| Qi Wang1, Qianheng Du2, Cedomir Petrovic2**, Hechang Lei1** |
1Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials $&$ Micro-nano Devices, Renmin University of China, Beijing 100872
2Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973, USA
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| Cite this article: |
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Qi Wang, Qianheng Du, Cedomir Petrovic et al 2020 Chin. Phys. Lett. 37 027502 |
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Abstract We report the growth of ternary half-Heusler MnPtSn single crystals and detailed study on its structural and physical properties. MnPtSn single crystal has a larger lattice parameter than that in polycrystal and it exhibits antiferromagnetism with transition temperature $T_{\rm N}$ at about 215 K, distinctly different from the ferromagnetism of MnPtSn polycrystal. Hall resistivity measurement indicates that the dominant carriers are hole-type and the nearly temperature-independent carrier concentration reaches about $2.86\times10^{22}$ cm$^{-3}$ at 5 K. Moreover, the carrier mobility is also rather low (4.7 cm$^{2}$$\cdot$V$^{-1}$s$^{-1}$ at 5 K). The above results strongly suggest that the significant Mn/Sn anti-site defects, i.e., the content of Mn in MnPtSn single crystal, play a vital role on structural, magnetic and transport properties.
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Received: 05 December 2019
Published: 18 January 2020
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| PACS: |
75.50.Ee
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(Antiferromagnetics)
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75.47.Np
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(Metals and alloys)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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| Fund: Supported by the National Key R&D Program of China (Grant Nos. 2018YFE0202600, 2016YFA0300504), the National Natural Science Foundation of China (Nos. 11574394, 11774423, 11822412), the Fundamental Research Funds for the Central Universities, the Research Funds of Renmin University of China (RUC) (Nos. 15XNLQ07, 18XNLG14, 19XNLG17), and the Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy (DOE) under Contract No. DE-SC0012704. |
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