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Title: Magnetic and Structural Properties of the Iron Oxychalcogenides La 2O 2Fe 2O M 2 ( M = S, Se)

Abstract

In this paper, we present the results of structural and magnetic phase comparisons of the iron oxychalcogenides La 2O 2Fe 2O M 2 ( M = S, Se). Elastic neutron scattering reveals that $M$ = S and Se have similar nuclear structures at room and low temperatures. Both materials obtain antiferromagnetic ordering at a Neel temperature $$T_{N}$$ 90.1 $$\pm$$ 0.16 K and 107.2 $$\pm$$ 0.06 K for $M$ = Se and S, respectively. The magnetic arrangements of $M$ = S, Se are obtained through Rietveld refinement and we present the first direct comparison of magnetic structural analysis for these materials. We find the order parameter exponent $$\beta$$ to be 0.129 $$\pm$$ 0.006 for $M$ = Se and 0.133 $$\pm$$ 0.007 for $M$ = S. Each of these values is near the Ising symmetry value of 1/8. Lastly, this suggests that although lattice and electronic structural modifications result from chalcogen exchange, the nature of the magnetic interactions is similar in these materials.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1491946
Alternate Identifier(s):
OSTI ID: 1466721
Grant/Contract Number:  
AC02-05CH11231; AC02-05-CH1231
Resource Type:
Published Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 2; Related Information: https://arxiv.org/abs/1801.00342; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Freelon, B., Yamani, Z., Swainson, Ian, Flacau, R., Karki, B., Liu, Yu Hao, Craco, L., Laad, M. S., Wang, Meng, Chen, Jiaqi, Birgeneau, R. J., and Fang, Minghu. Magnetic and Structural Properties of the Iron Oxychalcogenides La2O2Fe2OM2 (M = S, Se). United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.024109.
Freelon, B., Yamani, Z., Swainson, Ian, Flacau, R., Karki, B., Liu, Yu Hao, Craco, L., Laad, M. S., Wang, Meng, Chen, Jiaqi, Birgeneau, R. J., & Fang, Minghu. Magnetic and Structural Properties of the Iron Oxychalcogenides La2O2Fe2OM2 (M = S, Se). United States. doi:10.1103/PhysRevB.99.024109.
Freelon, B., Yamani, Z., Swainson, Ian, Flacau, R., Karki, B., Liu, Yu Hao, Craco, L., Laad, M. S., Wang, Meng, Chen, Jiaqi, Birgeneau, R. J., and Fang, Minghu. Tue . "Magnetic and Structural Properties of the Iron Oxychalcogenides La2O2Fe2OM2 (M = S, Se)". United States. doi:10.1103/PhysRevB.99.024109.
@article{osti_1491946,
title = {Magnetic and Structural Properties of the Iron Oxychalcogenides La2O2Fe2OM2 (M = S, Se)},
author = {Freelon, B. and Yamani, Z. and Swainson, Ian and Flacau, R. and Karki, B. and Liu, Yu Hao and Craco, L. and Laad, M. S. and Wang, Meng and Chen, Jiaqi and Birgeneau, R. J. and Fang, Minghu},
abstractNote = {In this paper, 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. Both materials obtain antiferromagnetic ordering at a Neel temperature $T_{N}$ 90.1 $\pm$ 0.16 K and 107.2 $\pm$ 0.06 K for $M$ = Se and S, respectively. The magnetic arrangements of $M$ = S, Se are obtained through Rietveld refinement and we present the first direct comparison of magnetic structural analysis for these materials. We find the order parameter exponent $\beta$ to be 0.129 $\pm$ 0.006 for $M$ = Se and 0.133 $\pm$ 0.007 for $M$ = S. Each of these values is near the Ising symmetry value of 1/8. Lastly, this suggests that although lattice and electronic structural modifications result from chalcogen exchange, the nature of the magnetic interactions is similar in these materials.},
doi = {10.1103/PhysRevB.99.024109},
journal = {Physical Review B},
number = 2,
volume = 99,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevB.99.024109

Figures / Tables:

Figure 1 Figure 1: The magnetic susceptibility of La2OFe2O2M2. (a) M = Se and (b) M = S.

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