Magneto-caloric effect in the pseudo-binary intermetallic YPrFe17 compound

We have synthesized the intermetallic YPrFe17 compound by arc-melting. X-ray and neutron powder diffraction show that the crystal structure is rhombohedral with R 3 [macr] m space group (Th2Zn17-type). The investigated compound exhibits a broad isothermal magnetic entropy change Delta S|> M(T) as...

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Published in:Materials chemistry and physics 2011-12, Vol.131 (1-2), p.18-22
Main Authors: Álvarez, Pablo, Gorria, Pedro, Sánchez Llamazares, José L., Pérez, María J., Franco, Victorino, Reiffers, Marian, Kováč, Jozef, Puente-Orench, Inés, Blanco, Jesús A.
Format: Article
Language:English
Subjects:
Alloys
Crystal structure
Diffraction
Entropy
Intermetallics
Magnetic fields
Mathematical analysis
X-rays
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Summary:We have synthesized the intermetallic YPrFe17 compound by arc-melting. X-ray and neutron powder diffraction show that the crystal structure is rhombohedral with R 3 [macr] m space group (Th2Zn17-type). The investigated compound exhibits a broad isothermal magnetic entropy change Delta S|> M(T) associated with the ferro-to-paramagnetic phase transition (T|> Ca[control] arrow up 90K). The | Delta S|> M| (a[control] arrow up .3Jkg-1K-1) and the relative cooling power (a[control] arrow right 00Jkg-1) have been calculated for applied magnetic field changes up to 1.5T. A single master curve for Delta S|>|>M under different values of the magnetic field change can be obtained by a rescaling of the temperature axis. The results are compared and discussed in terms of the magneto-caloric effect in the isostructural R2Fe17 (R=Y, Pr and Nd) binary intermetallic alloys.
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2011.09.062