Elastic properties of reentrant spin glass

Mukhopadhyay, P. K. ; Raychaudhuri, A. K. (1990) Elastic properties of reentrant spin glass Journal of Applied Physics, 67 (9). pp. 5235-5237. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v67/i9/p5235_...

Related URL: http://dx.doi.org/10.1063/1.344621


Young's modulus (E) and the sound velocity (v) of the alloy series Fe80−xNixCr20 were measured using a vibrating reed technique for 14≤x≤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 contribution 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→xc, where xc is the critical nickel concentration for the onset of ferromagnetism. In the spin glass (x<xc), 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<Tc) 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:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Chromium Alloys; Nickel Alloys; Iron Base Alloys; Young Modulus; Spin Glasses; Spin Glass State; Domain Structure; Magnetic-phase Transformations; Ultralow Temperature; Very Low Temperature; Low Temperature; Medium Temperature; Temperature Dependence; Magnetoelastic Effects; Sound Velocity
ID Code:42711
Deposited On:06 Jun 2011 07:32
Last Modified:06 Jun 2011 07:32

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