Heat capacity of gadolinium near the Curie point

"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"

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2011

Author dc:creator

• Lewis, Edwin Augustus Stevens

Contributors dc:contributor

• Slichter, C.P.

• heat capacity
• gadolinium
• Curie point
• temperature modulation method
• power law

Statement dc:rights

• 1969 Edwin Augustus Stevens Lewis

Language dc:language

en

Identifier

6070166

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/25799