Neutron Powder Diffraction Study on the Non-Superconducting Phases of ThFeAsN1-xOx（x=0.15,0.6）Iron Pnictide  

作　　者：Hui-Can Mao Bing-Feng Hu Yuan-Hua Xia Xi-Ping Chen Cao Wang Zhi-Cheng Wang Guang-Han Cao Shi-Liang Li Hui-Qian Luo 毛慧灿;胡丙锋;夏元华;陈喜平;王操;王志成;曹光旱;李世亮;罗会仟(Department of Physics and Center for Advanced Quantum Studies,Beijing Normal University,Beijing 100875;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190;Key Laboratory of Neutron Physics,Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621999;Department of Physics,Shandong University of Technology,Zibo 255049;Department of Physics and State Key Lab of Silicon Materials,Zhejiang University,Hangzhou 310027;Collaborative Innovation Centre of Advanced Microstructures,Nanjing 210093;Songshan Lake Materials Laboratory,Dongguan 523808;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190)

机构地区：[1]Department of Physics and Center for Advanced Quantum Studies,Beijing Normal University,Beijing 100875 [2]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190 [3]Key Laboratory of Neutron Physics,Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621999 [4]Department of Physics,Shandong University of Technology,Zibo 255049 [5]Department of Physics and State Key Lab of Silicon Materials,Zhejiang University,Hangzhou 310027 [6]Collaborative Innovation Centre of Advanced Microstructures,Nanjing 210093 [7]Songshan Lake Materials Laboratory,Dongguan 523808 [8]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190

出　　处：《Chinese Physics Letters》2019年第10期77-80,共4页中国物理快报（英文版）

基　　金：Supported by the Strategic Priority Research Program of Chinese Academy of Sciences under Grant Nos XDB07020300and 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 No2016004;the Key Laboratory of Neutron Physics of CAEP under Grant No 2015AB03;the Science Challenge Project under Grant No TZ2016004

摘　　要：We use neutron powder diffraction to study the non-superconducting phases of ThFeAsN1-xOx with x = 0.15,0.6.In our previous results of the superconducting phase ThFeAsN with Tc = 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 ThFeAsN1-xOx,two superconducting regions(0≤x≤0.1 and 0.25≤x≤0.55)are identified by transport experiments[J.Phys.:Condens.Matter30(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 magneticall.y ordered parent compound may not exist in this nitride family.We use neutron powder diffraction to study the non-superconducting phases of ThFeAsN1-xOx with x = 0.15,0.6.In our previous results of the superconducting phase ThFeAsN with Tc = 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 ThFeAsN1-xOx,two superconducting regions（0≤x≤0.1 and 0.25≤x≤0.55）are identified by transport experiments[J.Phys.:Condens.Matter30（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 magneticall.y ordered parent compound may not exist in this nitride family.

关 键 词：x=0 COMPOUND REFINEMENT 

分 类 号：O57[理学—粒子物理与原子核物理]