| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Interplay of iron and rare-earth magnetic order in rare-earth iron pnictide superconductors under magnetic field |
| Lei-Lei Yang(杨雷雷)1, Da-Yong Liu(刘大勇)1, Dong-Meng Chen(陈东猛)2, Liang-Jian Zou(邹良剑)1,3 |
1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
2. College of Science, China University of Petroleum, Qingdao 266580, China;
3. Department of Physics, University of Science and Technology of China, Hefei 230026, China |
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Abstract The magnetic properties of iron pnictide superconductors with magnetic rare-earth ions under strong magnetic field are investigated based on the cluster self-consistent field method. Starting from an effective Heisenberg model, we present the evolution of magnetic structures on magnetic field in RFeAsO (R = Ce, Pr, Nd, Sm, Gd, and Tb) and RFe2As2 (R = Eu) compounds. It is found that spin-flop transition occurs in both rare-earth and iron layers under magnetic field, in good agreement with the experimental results. The interplay between rare-earth and iron spins plays a key role in the magnetic-field-driven magnetic phase transition, which suggests that the rare-earth layers can modulate the magnetic behaviors of iron layers. In addition, the factors that affect the critical magnetic field for spin-flop transition are also discussed.
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Received: 15 October 2015
Revised: 10 November 2015
Accepted manuscript online:
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PACS:
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74.70.Xa
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(Pnictides and chalcogenides)
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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61.30.Gd
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(Orientational order of liquid crystals; electric and magnetic field effects on order)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11104274, 11274310, and 11474287) and the Fundamental Research Funds for the Central University (Grant No. 27R1310020A). |
Corresponding Authors:
Da-Yong Liu
E-mail: dyliu@theory.issp.ac.cn
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Cite this article:
Lei-Lei Yang(杨雷雷), Da-Yong Liu(刘大勇), Dong-Meng Chen(陈东猛), Liang-Jian Zou(邹良剑) Interplay of iron and rare-earth magnetic order in rare-earth iron pnictide superconductors under magnetic field 2016 Chin. Phys. B 25 027401
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