The determination of Curie temperature by differential scanning calorimetry under magnetic field

Abstract

Differential scanning calorimetry (DSC) has been shown to be a convenient and accurate method for measuring Curie temperature (T/sub c/) in terms of the observation that the heat flow has a visible variation at the transition point. An improved method is presented which involves the application of an axial magnetic field on samples during the DSC scanning process. The heat flow change of the samples at the Curie transition is amplified and a sharp T/sub c/ is easily observed. The improved DSC results show that the DC field is more effective in amplifying the transition phenomenon than the AC field.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>