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Electron spin resonance study of copper(II) doped ferroelectric ammonium sulphate

Manjunath, CV and Srinivasa, K (1977) Electron spin resonance study of copper(II) doped ferroelectric ammonium sulphate. In: Physica Status Solidi A-Applied Research, 44 (2). 687 - 692.

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Single crystal electron spin resonance studies of Cu2+ doped ferroelectric ammonium sulphate ((NH4)2SO4, Tc = 223 K) are reported at 300 and 77 K. The Cu2+ ion is found to enter the lattice interstitially with a trigonal bipyramidal coordination. Proton superhyperfine interaction is found for magnetic field directions close to the a-axis. Changes are observed in the 77 K recordings indicating a distortion of the trigonal bipyramid consistent with crystal structure data. An increase of the proton superhyperfine constant in the ferroelectric phase is indicative of stronger hydrogen bonding. The Cu2+ ion doped as an impurity in a trigonal bipyramid environment in a diamagnetic host lattice is reported for the first time.

Item Type: Journal Article
Publication: Physica Status Solidi A-Applied Research
Publisher: John Wiley and Sons
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 01 Jan 2010 07:39
Last Modified: 19 Sep 2010 05:49
URI: http://eprints.iisc.ac.in/id/eprint/24126

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