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Title:Heat capacity of gadolinium near the Curie point
Author(s):Lewis, Edwin Augustus Stevens
Doctoral Committee Chair(s):Slichter, C.P.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):heat capacity
gadolinium
Curie point
temperature modulation method
power law
Abstract:The dependence of the heat capacity of gadolinium on temperature has been observed close to the ferromagnetic Curie point at about 180 C. An "ac" or temperature modulation method allowed the use of very small single crystal samples. The heat capacity peak for our best sample is rounded in a range of lO at the Curie point (Tc ). Outside this region, good power law fits are obtained fora range of values of the critical exponents alpha (above Tc) and alpha' (below Tc )' the choice of which depends on the choice of Tc The entire set of data, including that in the rounded region, fits an expression derived from a simple macroscopic model of rounding. The Tc specified by this fit makes alpha = -.09 +/- .05 and alpha = -.32 +/- .05. Our results on Curie point and rounding are in disagreement with recent conjectures of Cadieu and Douglass for gadoliniumo
Issue Date:1969
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/25799
Rights Information:1969 Edwin Augustus Stevens Lewis
Date Available in IDEALS:2011-07-13
Identifier in Online Catalog:6070166


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