Acoustic detection of the magnetocaloric effect in gadolinium thin films : influence of the substrate
U. Nogal, A. M. Mansanares, F. C. G. Gandra, M. E. Soffner, A. O. Guimarães, E. C. da Silva, H. Vargas, E. Marín, A. Calderón
ARTIGO
Inglês
Este artigo foi apresentado no evento International Conference on Photothermal and Photoacoustic Phenomena, 2013
Agradecimentos: The authors acknowledge the Brazilian agencies CNPq, FAPERJ, FAPESP, and FAEPEX-Unicamp, as well as CONACYT, México, for financial support
Abstract: The magnetocaloric effect (temperature change) in gadolinium thin films is investigated as a function of the external magnetic field using the magnetoacoustic technique. The measured signal evidences the magnetic anisotropy of the sample, and it is in good agreement with results obtained...
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Abstract: The magnetocaloric effect (temperature change) in gadolinium thin films is investigated as a function of the external magnetic field using the magnetoacoustic technique. The measured signal evidences the magnetic anisotropy of the sample, and it is in good agreement with results obtained from magnetization measurements. The thermal coupling of the film with the substrate invalidates the adiabatic condition usually achieved when measuring bulk magnetic samples using the magnetoacoustic technique. The influence of the substrate on the temperature of the film is therefore investigated using a simple model for the heat diffusion within the sample. The temperature distribution is calculated as a function of the thermal parameters of the substrate and the results compared to the magnetoacoustic measurements
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
FUNDAÇÃO CARLOS CHAGAS FILHO DE AMPARO À PESQUISA DO ESTADO DO RIO DE JANEIRO - FAPERJ
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
Fechado
Acoustic detection of the magnetocaloric effect in gadolinium thin films : influence of the substrate
U. Nogal, A. M. Mansanares, F. C. G. Gandra, M. E. Soffner, A. O. Guimarães, E. C. da Silva, H. Vargas, E. Marín, A. Calderón
Acoustic detection of the magnetocaloric effect in gadolinium thin films : influence of the substrate
U. Nogal, A. M. Mansanares, F. C. G. Gandra, M. E. Soffner, A. O. Guimarães, E. C. da Silva, H. Vargas, E. Marín, A. Calderón
Fontes
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International journal of thermophysics. Journal of thermophysical properties and thermophysics and its applications (Fonte avulsa) |