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  Synthesis and Characterization of Frustrated Spin Ladders SrFe2S2O and SrFe2Se2O

Huh, S., Prots, Y., Adler, P., Tjeng, L. H., & Valldor, M. (2015). Synthesis and Characterization of Frustrated Spin Ladders SrFe2S2O and SrFe2Se2O. European Journal of Inorganic Chemistry, (18), 2982-2988. doi:10.1002/ejic.201500385.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-F3D8-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-1751-A
Genre: Journal Article

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 Creators:
Huh, Sungjoon1, Author              
Prots, Yurii2, Author              
Adler, Peter3, Author              
Tjeng, Liu Hao4, Author              
Valldor, Martin5, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863424              
3Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863435              
4Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              
5Martin Valldor, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863454              

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 Abstract: Chemical pressure was introduced by replacing Ba atoms with Sr atoms in the spin-ladder compounds AEFe(2)Ch(2)O (AE = Ba, Sr; Ch = S, Se). Powders and small single crystals of SrFe2S2O and SrFe2Se2O were synthesized from SrO, Fe, and Ch (S, Se). X-ray diffraction data were used to determine the crystal structures, which showed prominent magnetic ladderlike sublattices. The Mossbauer spectra of SrFe2S2O and SrFe2Se2O suggest the presence of localized divalent Fe ions in the FeCh(3)O structural units (distorted e(3)t(2)(3) configuration, S = 2). Single sharp hyperfine patterns at 5 K indicate the formation of simple antiferromagnetic ground states. The spin-ordering transitions (T-N) were determined by magnetic, resistivity, and specific heat data to be 216 and 228 K for SrFe2S2O and SrFe2Se2O, respectively. At ca. 540 K, both compounds exhibit a similar broad maximum in (T-max). In comparison with BaFe2S2O and BaFe2Se2O, the Sr homologues have higher T-max values, which suggest stronger intersite exchange interactions in accordance with the chemical pressure from the replacement of Sr atoms with Ba atoms. However, the lower Neel temperatures for the Sr homologues supports the idea that magnetic frustration is present, and it clearly has to be considered for this group of compounds.

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Language(s): eng - English
 Dates: 2015-06-062015-06-06
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: ISI: 000356599600009
DOI: 10.1002/ejic.201500385
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Title: European Journal of Inorganic Chemistry
  Other : Eur. J. Inorg. Chem.
Source Genre: Journal
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Publ. Info: Weinheim, Germany : Wiley-VCH
Pages: - Volume / Issue: (18) Sequence Number: - Start / End Page: 2982 - 2988 Identifier: ISSN: 1434-1948
CoNE: /journals/resource/954926953810_1