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

A. Glamazda; P. Lemmens; S. H. Do; K. Y. Choi

doi:10.1063/1.4985205

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

A. Glamazda
, P. Lemmens
, S. H. Do
, K. Y. Choi

Chung-Ang University
NASU - B. Verkin Institute for Low Temperature Physics and Engineering
Technical University of Braunschweig

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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 100K and develop highly correlated spin states below 50 K. This is ascribed to an instability of conventional magnetic excitations for the equilateral triangular antiferromagnet Ba3CoSb2O9 and a coexistence 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.

Original language	English
Pages (from-to)	543-550
Number of pages	8
Journal	Low Temperature Physics
Volume	43
Issue number	5
DOIs	https://doi.org/10.1063/1.4985205
State	Published - 1 May 2017
Externally published	Yes

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abstract = "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 100K and develop highly correlated spin states below 50 K. This is ascribed to an instability of conventional magnetic excitations for the equilateral triangular antiferromagnet Ba3CoSb2O9 and a coexistence 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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T1 - Comparative Raman scattering study of Ba3MSb2O9 (M = Zn, Co and Cu)

AU - Glamazda, A.

AU - Lemmens, P.

AU - Do, S. H.

AU - Choi, K. Y.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - 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 100K and develop highly correlated spin states below 50 K. This is ascribed to an instability of conventional magnetic excitations for the equilateral triangular antiferromagnet Ba3CoSb2O9 and a coexistence 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.

AB - 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 100K and develop highly correlated spin states below 50 K. This is ascribed to an instability of conventional magnetic excitations for the equilateral triangular antiferromagnet Ba3CoSb2O9 and a coexistence 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.

UR - https://www.scopus.com/pages/publications/85021074040

U2 - 10.1063/1.4985205

DO - 10.1063/1.4985205

M3 - Article

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SN - 1063-777X

VL - 43

SP - 543

EP - 550

JO - Low Temperature Physics

JF - Low Temperature Physics

IS - 5

ER -

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

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