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Electron paramagnetic resonance evidence for Jahn-Teller glasses

Murthy, Kumari and Dhanaraj, G and Bhat, HL and Bhat, SV (1988) Electron paramagnetic resonance evidence for Jahn-Teller glasses. In: Molecular Physics, 65 (1). pp. 181-191.

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Single crystal E.P.R. studies of copper as a dopant in lithium potassium sulphate, lithium ammonium sulphate and lithium sodium sulphate have been carried out from room temperature down to 77K. The three Jahn-Teller (JT) systems behave very similarly to one another. The room temperature dynamic JT spectra with giso = 2·19 ± 0·01 and Aiso = ±(33 ± 4) times 10-4 cm-1 transform around 247 K to spectra characterized by randomly frozen-in axial strains with g‖ = 2·4307 ± 0·0005, g⊥ = 2·083 ± 0·001, A‖ = ±(116 ± 2) times 10-4 cm-1 and A⊥ = ∓(14 ± 4) times 10-4 cm-1. We proposed that the low temperature phase (below 247 K) of each of these systems provides an example of a Jahn-Teller glass.

Item Type: Journal Article
Publication: Molecular Physics
Publisher: Taylor and Francis Group
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 15 Sep 2010 11:15
Last Modified: 15 Sep 2010 11:15
URI: http://eprints.iisc.ac.in/id/eprint/32173

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