Coexistence of para and ferromagnetic phases of Fe3+ in undoped CdZnTe (Zn similar to 4%) crystals

Kulkarni, Gururaj Anand and Murthy, Oruganty VSN and Rao, KSRK and Bhat, SV and Chakraborty, BR (2010) Coexistence of para and ferromagnetic phases of Fe3+ in undoped CdZnTe (Zn similar to 4%) crystals. In: Solid State Communications, 150 (43-44). pp. 2174-2177.

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Abstract

The signatures of the coexistence of para and ferromagnetic phases for the Fe3+ charge state of iron have been identified in the low temperature electron spin resonance (ESR) spectra in undoped CdZnTe (Zn similar to 4%) crystals and independently verified by superconducting quantum interference device (SQUID) and AC susceptibility measurements. In the paramagnetic phase the inverse of AC susceptibility follows the Curie-Weiss law. In the ferromagnetic phase the thermal evolution of magnetization follows the well-known Bloch T-3/2 law. This is further supported by the appearance of hysteresis in the SQUID measurements at 2 K below T-c which is expected to lie in between 2 and 2.5 K. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Semiconductors; Impurities in semiconductors; Phase transitions; Electron paramagnetic resonance
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	08 Dec 2010 11:10
Last Modified:	08 Dec 2010 11:10
URI:	http://eprints.iisc.ac.in/id/eprint/34302

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