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Static and dynamic magnetic response of fragmented haldane-like spin chains in layered Li3Cu2SbO6

The structure and the magnetic properties of layered Li3Cu2SbO6 are investigated by powder X-ray diffraction, static susceptibility, and electron spin resonance studies up to 330 GHz. The XRD data experimentally verify the space group C2/m with halved unit cell volume in contrast to previously repor...

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Bibliographic Details
Main Authors: Koo, Changhyun (Author) , Klingeler, Rüdiger (Author)
Format: Article (Journal)
Language:English
Published: July 11, 2016
In: Journal of the Physical Society of Japan
Year: 2016, Volume: 85, Issue: 8, Pages: ?
ISSN:1347-4073
DOI:10.7566/JPSJ.85.084702
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.7566/JPSJ.85.084702
Verlag, lizenzpflichtig, Volltext: https://journals.jps.jp/doi/10.7566/JPSJ.85.084702
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Author Notes:Changhyun Koo, Elena A. Zvereva, Igor L. Shukaev, Michael Richter, Mikhail I. Stratan, Alexander N. Vasiliev, Vladimir B. Nalbandyan, and Rüdiger Klingeler
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Summary:The structure and the magnetic properties of layered Li3Cu2SbO6 are investigated by powder X-ray diffraction, static susceptibility, and electron spin resonance studies up to 330 GHz. The XRD data experimentally verify the space group C2/m with halved unit cell volume in contrast to previously reported C2/c. In addition, the data show significant Li/Cu-intersite exchange. Static magnetic susceptibility and ESR measurements show two magnetic contributions, i.e., quasi-free spins at low-temperature and a spin-gapped magnetic subsystem, with about half of the spins being associated to each subsystem. The data suggest ferromagnetic-antiferromagnetic alternating chains with JFM = −285 K and JAFM = 160 K with a significant amount of Li-defects in the chains. The results are discussed in the scenario of fragmented 1D S = 1 AFM chains with a rather high defect concentration of about 17% and associated S = 1/2 edge states of the resulting finite Haldane chains.
Item Description:Gesehen am 15.05.2020
Physical Description:Online Resource
ISSN:1347-4073
DOI:10.7566/JPSJ.85.084702

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