Published November 9, 2006
| Version v1
Journal article
Magnetocaloric effect in La(FexSi1-x)13 doped with hydrogen and under external pressure
Creators
- 1. Universidade do Estado de Rio de Janeiro, Rua Sao Francisco Xavier 524, Rio de Janeiro, 20550-013 RJ (Brazil)
Description
In this paper, we calculate the magnetocaloric effect in the compounds La(FexSi1-x)13 doped with hydrogen and subjected to external pressure. We use a microscopical model where the Coulomb interaction between itinerant electrons is treated in the mean field approach. The effect of hydrogen atoms is considered as a chemical pressure. We also include phenomenologically the magnetoelastic coupling via the renormalization of the electron dispersion relation and the Debye temperature. The calculated isothermal entropy changes upon magnetic field variations for the compound La(Fe0.88Si0.12)13Hy are in good agreement with the available experimental data
Additional details
Identifiers
- DOI
- 10.1016/j.jallcom.2005.12.071;
- PII
- S0925-8388(05)01996-1;
Publishing Information
- Journal Title
- Journal of Alloys and Compounds
- Journal Volume
- 424
- Journal Issue
- 1-2
- Journal Page Range
- p. 41-45
- ISSN
- 0925-8388
- CODEN
- JALCEU
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38044672
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- COUPLING; DEBYE TEMPERATURE; DISPERSION RELATIONS; DOPED MATERIALS; ELECTRONS; ENTROPY; HYDROGEN; INTERACTIONS; IRON ALLOYS; LANTHANUM ALLOYS; MAGNETIC FIELDS; MEAN-FIELD THEORY; RENORMALIZATION; SILICON ALLOYS
- Descriptors DEC
- ALLOYS; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; LEPTONS; MATERIALS; NONMETALS; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT ALLOYS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.