Size-dependent thermal properties of multiferroic ErMnO3 nanoparticles using photopyroelectric technique

•Thermal properties of multiferroic ErMnO3, nanoparticles have been measured by the photopyroelectric technique.•The phonon confinement effects are more pronounced for nanoparticles than for the bulk.•This phenomenon may help for the design of devices based on ErMnO3 nanocrystalline materials. Therm...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-12, Vol.579, p.243-248
Main Authors: Raneesh, B., Soumya, H., Philip, J., Kalarikkal, Nandakumar
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
ErMnO3
Exact sciences and technology
Materials science
Multiferroic
Nanocrystalline materials
Nanopowders
Nanoscale materials and structures: fabrication and characterization
Nanostructured materials
Physics
Thermal analysis
Thermal expansion
thermomechanical effects and density
Thermal properties of condensed matter
Thermal properties of crystalline solids
Thermodynamic properties
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Summary:•Thermal properties of multiferroic ErMnO3, nanoparticles have been measured by the photopyroelectric technique.•The phonon confinement effects are more pronounced for nanoparticles than for the bulk.•This phenomenon may help for the design of devices based on ErMnO3 nanocrystalline materials. Thermal properties, such as thermal conductivity, thermal diffusivity, thermal effusivity and specific heat capacity, of geometrically frustrated multiferroic ErMnO3, having range of grain sizes from 32 to 220nm has been measured by the photopyroelectric technique. Our results show that phonon transport through nanocrystalline ErMnO3 is successfully suppressed by the enhanced phonon boundary scattering due to reduction in particle size. In addition internal strain in the nanosystem provides a mechanism to tune the thermal conductivity of materials. Quantification of this phenomenon may provide data and criteria for the design and fabrication of devices based on multiferroic ErMnO3 nanocrystalline materials.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2013.06.018