Magnetic Refrigeration: A New Challenge for Materials Scientists

Kurt H. Buschow 

Van der Waals-Zeeman Institute Univ. of Amsterdam, Valckenierstraat 65, Amsterdam NL-1018XE, Netherlands

Abstract

Magnetic refrigeration can be viewed as an alternative to the conventional vapor-compression technology. Magnetic refrigeration owes its renewed interest not only to its comparatively high efficiency but also to the fact that it is an environmentally friendly techniques, avoiding ozone-depleting or global-warming gases. This opens new research opportunities that have culminated in a worldwide search for novel magnetocaloric materials. In practice, magnetic refrigeration requires the combination of a magnetic field source of high strength and a material with a sufficiently high magnetocaloric effect (MCE). When looking at domestic applications, the best choice of the field source would be a permanent magnet. However, the field generated by permanent magnets falls typically into the 1-2 Tesla range and the MCE of most magnetic materials is too small for such a low field change to result in sufficient cooling power. Recent research activities have therefore been focused on materials with higher than average MCE value, and the prerequisites for attaining high MCEs will be briefly addressed in this talk. A commercially important aspect is the materials cost. Magnetocaloric materials based on magnetic 3d elements are much less expensive than those based on rare earth elements. In the present talk we will concentrate mainly on the results obtained with the former type of materials.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/17257 must be provided.

 

Presentation: Invited oral at E-MRS Fall Meeting 2008, Plenary session, by Kurt H. Buschow
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-07-21 13:17
Revised:   2009-06-07 00:48
Google
 
Web science24.com
© 1998-2022 pielaszek research, all rights reserved Powered by the Conference Engine