【摘 要】
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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
【机 构】
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Department of Physics and Center for Advanced Quantum Studies, Beijing Normal University, Beijing 10
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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.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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