Hamilton, J. J. ; Keatley, E. L. ; Ju, H. L. ; Raychaudhuri, A. K. ; Smolyaninova, V. N. ; Greene, R. L. (1996) Low-temperature specific heat of La0.67Ba0.33MnO3 and La0.8Ca0.2MnO3 Physical Review B: Condensed Matter and Materials Physics, 54 (21). pp. 14926-14929. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v54/i21/p14926_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.54.14926
Abstract
We report measurements of the specific heat of La0.67Ba0.33MnO3 and La0.8Ca0.2MnO3 for temperatures 2<T<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 T and T3, but a T3/2 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±17 K, and the linear term gives electron densities of states which are enhanced over band-structure estimates.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 42690 |
| Deposited On: | 06 Jun 2011 05:56 |
| Last Modified: | 06 Jun 2011 05:56 |
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