Making the most of the magnetic and lattice entropy changes

TitleMaking the most of the magnetic and lattice entropy changes
Publication TypeJournal Article
Year of Publication2009
AuthorsPecharsky VK, Gschneidner KA, Mudryk Y, Paudyal D
Journal TitleJournal of Magnetism and Magnetic Materials
Volume321
Pages3541-3547
Date Published11/01
ISBN Number0304-8853
Accession NumberISI:000269721100003
Keywords1st-order phase-transition, adiabatic temperature change, giant magnetocaloric effect, isothermal magnetic entropy change, magnetic cooling, magnetic hysteresis, magnetocaloric effect, magnetostructural transformation, phase-separated state, room-temperat
Abstract

Recent discoveries of novel materials exhibiting a magnetocaloric effect that is strongly enhanced by the magnetoelastic coupling - the so-called giant magnetocaloric effect materials - stimulated an unprecedented expansion of research related both to the fundamentals of the phenomenon and potential future applications of these materials in continuous magnetic cooling near room temperature. The subject of this work is two fold. On one hand, systems exhibiting the giant magneto caloric effect may be prone to hysteresis, and may exist in nonequilibrium, phase-separated states, thus requiring a special care when their intrinsic physical properties are of interest. On the other hand, in order to harvest most of the magnetocaloric potential of a specific compound, both the magnetic and lattice degrees of freedom of the material must be precisely controlled. (C) 2008 Elsevier B.V. All rights reserved.

URL<Go to ISI>://000269721100003
DOI10.1016/J.Jmmm.2008.03.013