Low-temperature specific heat of La0.78Pb0.22MnO3-d manganite

Details Low-temperature specific heat of La0.78Pb0.22MnO3-d manganite Low-temperature specific heat of La0.78Pb0.22MnO3-d manganite

2000-05-14

arxiv.org/abs/cond-mat/0005228v1

Physics

Condensed Matter

Strongly Correlated Electrons

accepted for presentation at the International Conference on Magnetism, Recife, August 2000; submitted to J. Magn. Magn. Mater

Scientific paper

10.1016/S0304-8853(00)01026-X

The specific heat of the perovskite manganite La0.78Pb0.22MnO3-d was measured from 0.5 to 25 K. The results yield values of the electronic density of states, the Debye temperature, and the spin-wave stiffness constant of the compound. The magnetic contribution was found to be consistent with the existence of a gap in the spin-wave spectrum, and a phonon term in T^5 was needed to fit the data.

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