Low-dimensional magnetism of spin-½ chain systems α- and β-TeVO4: a comparative study

Оптика и магнитооптика

Автор(и)

  • V. Gnezdilov B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • P. Lemmens Institute for Condensed Matter Physics, Braunschweig University of Technology Braunschweig D-38106, Germany
  • D. Wulferding Institute for Condensed Matter Physics, Braunschweig University of Technology Braunschweig D-38106, Germany
  • Yu. Pashkevich Donetsk O.O. Galkin Institute of Physics and Engineering of National Academy of Sciences of Ukraine 72 R. Luxemburg Str., Donetsk 83114, Ukraine
  • K. Lamonova Donetsk O.O. Galkin Institute of Physics and Engineering of National Academy of Sciences of Ukraine 72 R. Luxemburg Str., Donetsk 83114, Ukraine
  • K.-Y. Choi Department of Physics, Chung-Ang University, 221 Huksuk-Dong, Dongjak-Gu, Seoul 156–756, Republic of Korea
  • O. Afanasiev B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • S. Gnatchenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • H. Berger Inst. Phys. Mat. Complexe, EPFL, Lausanne CH–1015, Switzerland

DOI:

https://doi.org/10.1063/1.4734010

Ключові слова:

Raman scattering, low-dimensional magnetic systems, phononic and magnetic excitations.

Анотація

We present a comparative study of the low-dimensional compounds α- and β-TeVO4. Our data clearly show that the change in the local coordination geometry of V4+ ions comparing α- and β-TeVO4 leads to a drastic differences in the magnetic properties. Despite sharing the same crystal structure, the two compounds realize different magnetic exchange topologies. Both compounds exhibit a transition from ferro- to antiferromagnetic correlations with decreasing temperature. This effect however is driven by different mechanisms for both compounds. Additionally, a dimensional crossover is found in β-TeVO4.

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Опубліковано

2012-05-17

Як цитувати

(1)
Gnezdilov, V.; Lemmens, P.; Wulferding, D.; Pashkevich, Y.; Lamonova, K.; Choi, K.-Y.; Afanasiev, O.; Gnatchenko, S.; Berger, H. Low-Dimensional Magnetism of Spin-½ Chain Systems α- and β-TeVO4: A Comparative Study: Оптика и магнитооптика. Fiz. Nizk. Temp. 2012, 38, 715-727.

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