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Elastic properties of reentrant spin glass

Mukhopadhyay, PK and Raychaudhuri, AK (1990) Elastic properties of reentrant spin glass. In: Thirty-Fourth Annual Conference on Magnetism and Magnetic Materials, 28 Nov.-1 Dec. 1989, Boston, MA, USA, pp. 5235-5237.

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Young's modulus (E) and the sound velocity (v) of the alloy series $Fe_{80-x}Ni_xCr_{20}$ were measured using a vibrating reed technique for 14&les;x&les;30 in the temperature range 1.5-300 K. The measurement, done over a large range of x and T, made it possible to study and compare the elastic manifestation of various magnetic transitions in a single alloys series, from long-range antiferromagnet (AFM) to long-range ferromagnet (FM) through intermediate phases of spin glass (SG) and reentrant spin glass (RSG). The magnetic contributions to E and v is found to be qualitatively similar in FM and RSG alloys (both positive) and that it tends to zero as $x\rightarrow x_c$, where xc is the critical nickel concentration for the onset of ferromagnetism. In the spin glass $(x<x_c)$, the magnetic contribution is negative and shows a minimum near the spin-glass transition. E has also been measured in an applied field H(=0.02 T) as a function of temperature $(T<T_c)$ to study the contribution of magnetic domains to E in alloys with ferromagnetic and reentrant spin-glass transitions. It is found that in RSG alloys, the domain-related contribution to E vanishes below the reentrant transition

Item Type: Conference Paper
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Jul 2007
Last Modified: 24 Jan 2012 09:05
URI: http://eprints.iisc.ac.in/id/eprint/11437

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