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Low-temperature behavior of alkali halides doped with hydroxyl

Low-temperature behavior of alkali halides doped with hydroxyl The low-temperature dielectric dispersions of LiF, NaCl, KCl, and KBr have been measured for different concentrations of OH−. With decreasing tunnel splitting of the OH− levels, and with increasing dipolar interaction, a behavior is observed below ∼1 K similar to that found in amorphous materials and attributed to two-level states (TLS). Differences between OH− and TLS are noted, the main difference being that the broad spectrum of energy levels associated with the OH− in alkali halides arises from dipolar interactions rather than an atomically disordered environment. It is argued that an electric dipole analog of the magnetic spin-glass state does not occur in the OH− systems. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Low-temperature behavior of alkali halides doped with hydroxyl

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References (60)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00681269
Publisher site
See Article on Publisher Site

Abstract

The low-temperature dielectric dispersions of LiF, NaCl, KCl, and KBr have been measured for different concentrations of OH−. With decreasing tunnel splitting of the OH− levels, and with increasing dipolar interaction, a behavior is observed below ∼1 K similar to that found in amorphous materials and attributed to two-level states (TLS). Differences between OH− and TLS are noted, the main difference being that the broad spectrum of energy levels associated with the OH− in alkali halides arises from dipolar interactions rather than an atomically disordered environment. It is argued that an electric dipole analog of the magnetic spin-glass state does not occur in the OH− systems.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Nov 6, 2004

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