الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
The main aim of this work is the study of the critical point
phenomena through the measurements of the electrical resis
tivity Ify it as one of the most important transport property
for ferromagnetic systems. The electrical resistivity of four
nickel-base chromium dilute alloys having different concent
rations, namely 0.00, 0.12, 0.51, and 1.13 at. 1% have been
measured. The electrical resistivity has been measured by
locating the specimens in a temperature homogeneous tubular
furnace constructed especially for this purpose. The homogeti
eity of the temperature Iii the central region of the furnace
is achieved by a separate homogeneity test. The copper-cons
tantan thermocouple used in measuring the temperature is
calibrated by a platinum resistance thermometer. The electr
ical resistivity measurements have been carried out using
the direct current (d.c) four probe technique. Both the
first and second derivative of the electrical resistivity
OC (T) andOC(T)’) are graphically determined in the vicinity
of the Curie-tempoi,,,ture ... re ” using steps of 0.1 K. The
present work daLc, h(tve been fined to a power law form. The
log-log plot of the second derivative of the resistivity,
C< % (T), versus the reduced temperature 1CII indicates a
logarithmic diver-ence, for T->Twith a break point at