| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Neutron Powder Diffraction Study on the Non-Superconducting Phases of ThFeAsN$_{1-x}$O$_x$ ($x=0.15, 0.6$) Iron Pnictide |
| Hui-Can Mao1,2, Bing-Feng Hu3**, Yuan-Hua Xia3, Xi-Ping Chen3, Cao Wang4, Zhi-Cheng Wang5, Guang-Han Cao5,6, Shi-Liang Li2,7,8, Hui-Qian Luo2,7** |
1Department of Physics and Center for Advanced Quantum Studies, Beijing Normal University, Beijing 100875
2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
3Key Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999
4Department of Physics, Shandong University of Technology, Zibo 255049
5Department of Physics and State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027
6Collaborative Innovation Centre of Advanced Microstructures, Nanjing 210093
7Songshan Lake Materials Laboratory, Dongguan 523808
8School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190
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| Cite this article: |
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Hui-Can Mao, Bing-Feng Hu, Yuan-Hua Xia et al 2019 Chin. Phys. Lett. 36 107403 |
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Abstract We use neutron powder diffraction to study the non-superconducting phases of ThFeAsN$_{1-x}$O$_x$ with $x=0.15$, 0.6. In our previous results of the superconducting phase ThFeAsN with $T_{\rm c}=30$ K, no magnetic transition is observed by cooling down to 6 K, and possible oxygen occupancy at the nitrogen site is shown in the refinement [Europhys. Lett. 117 (2017) 57005]. Here in the oxygen doped system ThFeAsN$_{1-x}$O$_x$, two superconducting regions ($0\leqslant x \leqslant 0.1$ and $0.25\leqslant x \leqslant 0.55$) are identified by transport experiments [J. Phys.: Condens. Matter 30 (2018) 255602]. However, within the resolution of our neutron powder diffraction experiment, neither the intermediate doping $x=0.15$ nor the heavily overdoped compound $x=0.6$ shows any magnetic order from 300 K to 4 K. Therefore, while it shares the common phenomenon of two superconducting domes as most 1111-type iron-based superconductors, the magnetically ordered parent compound may not exist in this nitride family.
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Received: 14 July 2019
Published: 21 September 2019
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| PACS: |
74.70.Xa
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(Pnictides and chalcogenides)
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74.62.Bf
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(Effects of material synthesis, crystal structure, and chemical composition)
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61.05.F-
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(Neutron diffraction and scattering)
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| Fund: Supported by the Strategic Priority Research Program of Chinese Academy of Sciences under Grant Nos XDB07020300 and XDB25000000, the National Key Research and Development Program of China under Grant Nos 2017YFA0303103, 2017YFA0302903 and 2016YFA0300502, the National Natural Science Foundation of China under Grant Nos 11374011, 11504347, 11304183, 11674406 and 11822411, the Youth Innovation Promotion Association of Chinese Academy of Sciences under Grant No 2016004, the Key Laboratory of Neutron Physics of CAEP under Grant No 2015AB03, and the Science Challenge Project under Grant No TZ2016004. |
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