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Home / Journal of Nanoscience and Nanotechnology, Volume 16, Number 11

Study of Magnetocaloric Effect in (1–y)La0.7Sr0.3MnO3/(y)Mn0.5Zn0.5Fe2O4 Composite

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The structural, magnetic and magnetocaloric properties of (1–y)LSMO/(yMn0.5Zn0.5Fe2O4 (y = 0.00, 0.03, 0.05, 0.10) composite samples have been studied. All samples show mainly pervoskite phase with rhombohedral crystal lattice. The XRD peaks of Mn0.5Zn0.5Fe2O4 phase were not observed because of its very low concentration in the composite sample. The magnetization measurement reveals that the Curie temperature, Tc decreases significantly with increasing the Mn0.5Zn0.5Fe2O4 concentration in the composite samples. On the other hand, the temperature range of paramagnetic-ferromagnetic transition becomes broader in case of composite samples. The magnetic entropy evaluation shows that the ΔS max M decreased in case of composite samples as compared to that of pure LSMO sample. In addition, an enhanced relative cooling power of 57 J/kg (at 1 T) was observed for the (0.97)LSMO/(0.03)Mn0.5Zn0.5Fe2O4 composite sample, which is due to the increased ∂T FWHM over 62 K around room temperature.

Keywords: Composite; Grains; Magnetocaloric Effect; Solid-State Refrigeration

Document Type: Research Article

Affiliations: School of Materials Science and Engineering, Changwon National University, Changwon, 641-773, South Korea

Publication date: 01 November 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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