On the estimation of the magnetocaloric effect by means of microwave technique

Abstract

The method based on low-field microwave absorption measurements is presented to estimate the relative change of entropy with magnetic field. This method is illustrated on both the polycrystalline Gd5Si 2Ge2 alloy and the single crystalline La 0.7Ca0.3MnO3 manganite. It is shown that there is the simple functional relation between magnetization and non-resonant absorption over a narrow temperature range near the magnetic phase transition. The magnetoresistance is assumed to be the dominating mechanism underlying this relation. © 2012 Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License.