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Comparative Raman scattering study of Ba3MSb2O9 (M=Zn, Co and Cu)
- Authors
- Glamazda, A.; Lemmens, P.; Do, S. -H.; Choi, K. -Y.
- Issue Date
- May-2017
- Publisher
- AMER INST PHYSICS
- Citation
- LOW TEMPERATURE PHYSICS, v.43, no.5, pp 543 - 550
- Pages
- 8
- Journal Title
- LOW TEMPERATURE PHYSICS
- Volume
- 43
- Number
- 5
- Start Page
- 543
- End Page
- 550
- ISSN
- 1063-777X
1090-6517
- 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 Ba3MSb2O9 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 Ba3MSb2O9 and a coexistence of spin-orbital liquid and random singlet state for the decorated honeycomb compound Ba3MSb2O9 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. Published by AIP Publishing.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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