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Title: Magnetic and structural properties of the iron oxychalcogenides La 2 O 2 Fe 2 O M 2 ( M = S , Se )

Journal Article · · Physical Review. B

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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05-CH1231; AC02-05CH11231
OSTI ID:
1491946
Alternate ID(s):
OSTI ID: 1466721
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Vol. 99 Journal Issue: 2; ISSN 2469-9950
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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An unexpected gap: Magnetic structures of <mml:math altimg="si46.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>-</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Mn</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Se</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> investigated by neutron diffraction and physical property measurements journal March 2014
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Figures / Tables (11)