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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Abstract

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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