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Author Jennings, L. D. ♦ Hill, E. ♦ Spedding, F. H.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ FERROMAGNETIC MATERIALS
Abstract Thulium shows a GAMMA anomaly in its heat capacity near 55 deg K which is associated with magnetic ordering and which shows thermal hysteresis. In addition, there are anomalous changes in the slope of the heat capacity curve near 88 deg , 162 deg , and 180 deg K. These changes and the unexpectedly low value of the slope near room temperature complicate the analysis of the data, but there is evidence that the effective exchange integral in Tm is appreciably larger than that for neighboring rare earths. The results in the temperature range from 14 to 2l deg K support a T/sup 3/ dependence of the magnetic specific heat as predicted by spin wave theory for an antiferromagnet. The thermodynamic functions are tabulated for the temperature range studied. (auth)
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-06-01
Publisher Department Ames Lab., Ames, Iowa
Journal Journal of Chemical Physics
Volume Number 34
Technical Publication No. IS-177
Organization Ames Lab., Ames, Iowa


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