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  Crystal structures and variable magnetism of PbCu2(XO3)2Cl2 with X = Se, Te

Berdonosov, P. S., Janson, O., Olenev, A. V., Krivovichev, S. V., Rosner, H., Dolgikh, V. A., et al. (2013). Crystal structures and variable magnetism of PbCu2(XO3)2Cl2 with X = Se, Te. Dalton Transactions, 42(26), 9547-9554. doi:10.1039/c3dt50426c.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1FBF-E Version Permalink: http://hdl.handle.net/21.11116/0000-0000-FF24-9
Genre: Journal Article

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 Creators:
Berdonosov, P. S., Author
Janson, O.1, Author              
Olenev, A. V., Author
Krivovichev, S. V., Author
Rosner, H.2, Author              
Dolgikh, V. A., Author
Tsirlin, A. A.3, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Helge Rosner, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863450              
3Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              

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 Abstract: Novel Cu2+-based compounds PbCu2(SeO3)(2)Cl-2 (space group C2/c; a = 13.056(1) angstrom; b = 9.5567(9) angstrom; c = 6.9006(6) angstrom; beta = 90.529(7)degrees; R-I = 0.0371) and PbCu2(TeO3)(2)Cl-2 (space group P21; a = 7.2401(2) angstrom; b = 7.2688(2) angstrom; c = 8.2846(2) angstrom; beta = 96.416(2)degrees; R-I = 0.0570) have been obtained by solid-state synthesis. Their crystal structures are remarkably dissimilar and underlie a very different magnetic behavior. While PbCu2(SeO3)(2)Cl-2 can be well described by a spin-chain model with an exchange coupling of J(1)similar or equal to 160 K, PbCu2(TeO3)(2)Cl-2 is a spin-dimer system that, however, features a comparable magnetic nearest-neighbor coupling of J. 213 K. PbCu2(SeO3)(2)Cl-2 orders antiferromagnetically below 12 K, whereas PbCu2(TeO3)(2)Cl-2 lacks long-range magnetic order down to at least 2 K, owing to the strong dimerization of the Cu2+ spins. Crystal structures of both compounds are rationalized in terms of relevant magnetic exchange pathways, and the implications for a broader range of Cu2+ compounds are discussed.

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Language(s): eng - English
 Dates: 2013
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: eDoc: 668935
ISI: 000320246200019
DOI: 10.1039/c3dt50426c
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Title: Dalton Transactions
Source Genre: Journal
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Pages: - Volume / Issue: 42 (26) Sequence Number: - Start / End Page: 9547 - 9554 Identifier: ISSN: 1477-9226