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

Authors
Ghivelder, L Freitas, RS Rapp, RE Chaves, FAB Gospodinov, M Gusmao, MA
Citation
L. Ghivelder et al., Low-temperature specific heat of La0.78Pb0.22MnO3-delta manganite, J MAGN MAGN, 226, 2001, pp. 845-846
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN journal
03048853 → ACNP
Volume
226
Year of publication
2001
Part
1
Pages
845 - 846
Database
ISI
SICI code
0304-8853(200105)226:<845:LSHOLM>2.0.ZU;2-A
Abstract
The specific heat of the perovskite manganite La0.78Pb0.22MnO3-delta was me asured 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. (C) 2001 Elsevier Science B.V. All rights reserved .