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Magnetic and structural properties of the iron oxychalcogenides La2O2Fe2OM2(M=S,Se)

B. Freelon, Z. Yamani, Ian Swainson, R. Flacau, B. Karki, Yu Hao Liu, L. Craco, M. S. Laad, Meng Wang, Jiaqi Chen, R. J. Birgeneau, and Minghu Fang
Phys. Rev. B 99, 024109 – Published 24 January 2019
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  • INTRODUCTION
  • EXPERIMENT
  • RESULTS
  • CONCLUSIONS
  • ACKNOWLEDGMENTS
    • References

    Abstract

    We present the results of structural and magnetic phase comparisons of the iron oxychalcogenides La2O2Fe2OM2(M=S,Se). Elastic neutron scattering reveals that M=S and Se have similar nuclear structures at room and low temperatures. Our neutron diffraction data reveals that both materials obtain antiferromagnetic ordering at a Néel temperature TN90.1±0.16 K and 107.2±0.06 K for M=Se and S, respectively. The magnetic arrangements for both M=S, Se compounds are obtained through Rietveld refinement. We find the order parameter exponent β to be 0.129±0.006 for M=Se and 0.133±0.007 for M=S. Each of these values is near the Ising symmetry value of 1/8. This suggests that although lattice and electronic structural modifications result from chalcogen replacement, the nature of the magnetic interactions is similar in these materials.

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    • Received 31 December 2017
    • Revised 28 December 2018

    DOI:https://doi.org/10.1103/PhysRevB.99.024109

    Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

    Published by the American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    InsulatorsMagnetic orderMagnetic phase transitionsOrder parametersSuperconductors
    Condensed Matter, Materials & Applied Physics

    Authors & Affiliations

    B. Freelon1,*, Z. Yamani2, Ian Swainson3, R. Flacau2, B. Karki1, Yu Hao Liu4, L. Craco5, M. S. Laad6, Meng Wang7, Jiaqi Chen8, R. J. Birgeneau9,10,11, and Minghu Fang8

    • 1Department of Physics, University of Louisville, Louisville, Kentucky 40208, USA
    • 2Canadian Nuclear Laboratories, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0
    • 3Physics Section, International Atomic Energy Agency, Vienna International Centre, P.O. Box 100, 1400 Vienna, Austria
    • 4Department of Materials Science and Engineering, University of Illinois Urbana Champaign, Urbana, Illinois 61801, USA
    • 5Instituto de Fisica, Universidade Federal de Mato Grosso, 78060-900 Cuiaba, MT, Brazil
    • 6The Institute of Mathematical Sciences, C.I.T. Campus, Chennai 600 113, India
    • 7School of Physics, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
    • 8Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China
    • 9Department of Physics, University of California, Berkeley, California 94720, USA
    • 10Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
    • 11Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA

    • *byron.freelon@louisville.edu

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    Issue

    Vol. 99, Iss. 2 — 1 January 2019

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