Comparative Raman scattering study of Ba3MSb2O9 (M=Zn, Co and Cu)

Автор(и)

  • A. Glamazda Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea
  • P. Lemmens Institute for Condensed Matter Physics, TU Braunschweig, Braunschweig D-38106, Germany
  • ,S.-H. Do Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea
  • K.-Y. Choi Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea

DOI:

https://doi.org/10.1063/1.4985205

Ключові слова:

spin frustration, spin-phonon coupling, Raman scattering.

Анотація

Raman spectroscopy is combined with lattice dynamic calculations to investigate the magnetic and structural properties of the 6H-perovskite compounds Ba3MSb2O9 (M = Zn, Co and Cu). Unlike the nonmagnetic Ba3ZnSb2O9 compound, the magnetic counterparts Ba3MSb2O9 (M = Co and Cu) show both lattice anomalies for temperatures below 100 K and develop highly correlated spin states below 50 K. This is ascribed to an instability of сonventional magnetic excitations for the equilateral triangular antiferromagnet Ba3CoSb2O9 and a co-existence of spin-orbital liquid and random singlet state for the decorated honeycomb compound Ba3CuSb2O9 containing a nearly identical volume fraction of hexagonal and orthorhombic phases. Our results demonstrate that Ba3MSb2O9 provides a rich reservoir for hosting diverse magnetic and structural phases as a function of the metal ion M.

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Опубліковано

2017-03-20

Як цитувати

(1)
Glamazda, A.; Lemmens, P.; Do, ,S.-H.; Choi, K.-Y. Comparative Raman Scattering Study of Ba3MSb2O9 (M=Zn, Co and Cu). Fiz. Nizk. Temp. 2017, 43, 683-691.

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