Magnetocaloric manganites: Progress and challenges

✍ Scribed by Phan, Manh-Huong ;Yu, Seong-Cho

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 276 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200777188

✦ Synopsis

Abstract

Magnetic refrigeration based on the magnetocaloric effect (MCE) becomes a topic of internationally current interest. This enabling technology provides several advantages (e.g. high energy efficiency, small volume, non‐pollution) over a conventional gas compression technique. It depends heavily upon the magnitude of MCE of magnetic substances that are used as working refrigerants. Therefore, current research is focused on a search for new materials that are low cost and exhibit small magnetic field‐induced large MCEs. This paper aims to review the recent developments of a new class of magnetocaloric material, namely, ferromagnetic manganites (R~1‐x~M~x~MnO~3~, where R = La, Nd, Pr and M = Ca, Sr, Ba, etc.). The good magnetocaloric properties of ferromagnetic manganites in addition to their flexibility and cost‐effectives make them very promising for active magnetic refrigeration (AMR) applications in the temperature range of 30–375 K. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)