Nonadiabatic heat-capacity measurements using a superconducting quantum interference device magnetometer

Authors

A.I. Kharkovski, Laboratorium fu¨r Angewandte Physik, Gerhard-Mercator-Universita¨t, Duisburg, Germany
Christian Binek, University of Nebraska-LincolnFollow
Wolfgang Kleeman, Laboratorium fu¨r Angewandte Physik, Gerhard-Mercator-Universita¨t, Duisburg, GermanyFollow

Date of this Version

10-9-2000

Comments

Published by American Institute of Physics. Copyright 2000. Permission to use. Appl. Phys. Lett. 77, 2409 (2000). http://www.apl.aip.org/.

Abstract

Nonadiabatic measurements of the heat capacity involving sample-inherent thermometry are proposed. The method is realized with superconducting quantum interference device magnetometry and applied to FeBr₂ single crystals by using the magnetization for both thermometry and relaxation calorimetry. When heating with a step pulse of laser light, the magnetization relaxes on a characteristic time scale Ί = RC, where C is the heat capacity and R is the heat resistance between the sample and the bath. R is independently determined from the temperature dependence of the magnetic moment measured with and without stationary light irradiation. ©2000 American Institute of Physics.