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  Dielectric properties of the low dimensional vanadium oxides Ba2V3O9 and Sr2V3O9

Bobnar, V., Lunkenheimer, P., Loidl, A., Kaul, E. E., & Geibel, C. (2002). Dielectric properties of the low dimensional vanadium oxides Ba2V3O9 and Sr2V3O9. Solid State Communications, 122(11), 595-599. doi:10.1016/S0038-1098(02)00220-X.

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 Creators:
Bobnar, V., Author
Lunkenheimer, P., Author
Loidl, A., Author
Kaul, E. E.1, Author              
Geibel, C.2, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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Free keywords: magnetically ordered materials; semiconductors; dielectric response; electronic transport
 Abstract: The dielectric response of the low-dimensional vanadium oxides Ba2V3O9 and Sr2V3O9 has been investigated in the frequency range of 20 Hz-1 MHz. At low frequencies the dielectric response is governed by strong relaxation-like features, which we attribute to Maxwell-Wagner type contact contributions. The analysis of the complex dielectric spectra in terms of an equivalent circuit revealed the intrinsic dielectric constant and dc conductivity of these systems. The frequency-dependent ac conductivity in both systems follows the universal dielectric response behaviour, clearly indicating that hopping of localised charge carriers is the dominating charge-transport process. Also, a newly observed dielectric relaxation process in both systems is reported and we find evidence for a phase transition close to 455 K in both materials. (C) 2002 Elsevier Science Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 16437
ISI: 000176873500003
DOI: 10.1016/S0038-1098(02)00220-X
 Degree: -

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Title: Solid State Communications
  Alternative Title : Solid State Commun.
Source Genre: Journal
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Pages: - Volume / Issue: 122 (11) Sequence Number: - Start / End Page: 595 - 599 Identifier: ISSN: 0038-1098