High pressure studies on magnetic and nonmagnetic metallic glasses

Ramesh, TG and Shubha, V (1986) High pressure studies on magnetic and nonmagnetic metallic glasses. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

This paper is primarily concerned with the effect of pressure on the transport properties viz. thermo-power and resistivity of magnetic and non-magnetic metallic glasses. The absolute thermo-power (TEP) of FegOB20' a ferromagnetic metallic glass, has been measured as a function of temperature between 300 K and 1000 K up to 30 Kbar pressure. A previous study on this system at ambient pressure revealed no change in TEP at the crystallization temperature, T , while the x resistivity showed a sudden decrease at the same temperature. T.be present experimental work which employs the differential method for TEP measurement shows a distinct anomaly at T even at ambient x pressure and this anomaly gets enhanced under pressure. High pressure studies on the non-magnetic Ti 50Bei+OZr 10 system indicate that while TEP exhibits marked anomalies near the glass transition temperature and the two crystallization temperatures, the resistivity shows no perceptible anomaly near the second crystallization temperature. These experimental results have been analysed on the basis of some current theoretical models for electron transport in glassy metals.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Metallic glasses;Nonmagnetic metallic glasses
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Users 90 not found.
Date Deposited: 23 Oct 2006
Last Modified: 24 May 2010 04:22
URI: http://nal-ir.nal.res.in/id/eprint/3102

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