Low-temperature specific heat of La{sub 0.67}Ba{sub 0.33}MnO{sub 3} and La{sub 0.8}Ca{sub 0.2}MnO{sub 3}
- Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111 (United States)
We report measurements of the specific heat of La{sub 0.67}Ba{sub 0.33}MnO{sub 3} and La{sub 0.8}Ca{sub 0.2}MnO{sub 3} for temperatures 2{lt}{ital T}{lt}15 K. These materials are ferromagnetic metallic oxides which exhibit colossal magnetoresistance. We find that above 3 K the specific heat has terms proportional to {ital T} and {ital T}{sup 3}, but a {ital T}{sup 3/2} term, as might be expected from the excitation of ferromagnetic spin waves, cannot be resolved outside of the precision of the data. The cubic term gives Debye temperatures of 400{plus_minus}17 K, and the linear term gives electron densities of states which are enhanced over band-structure estimates. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 397589
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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