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

(2) Bulgarian Academy of Sciences; (3) IF-UFRGS; Brazil; Brazil); F.A.B. Chaves (1); L. Ghivelder (1); M.A. Gusmao (3) ((1) IF-UFRJ; M. Gospodinov (2); Porto-Alegre; R.E. Rapp (1)

arxiv: cond-mat/0005228 · v1 · submitted 2000-05-14 · ❄️ cond-mat.str-el · cond-mat.mtrl-sci

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

L. Ghivelder (1) , R.S. Freitas (1) , R.E. Rapp (1) , F.A.B. Chaves (1) , M. Gospodinov (2) , M.A. Gusmao (3) ((1) IF-UFRJ , Rio de Janeiro , Brazil

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(2) Bulgarian Academy of Sciences Sofia (3) IF-UFRGS Porto-Alegre Brazil)

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classification ❄️ cond-mat.str-el cond-mat.mtrl-sci

keywords heatmanganitemno3-dspecificspin-wavecompoundconsistentconstant

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

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