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

Kharkovski, A. I.; Kharkovski, A.I.; Binek, Ch.; Kleemann, W.
October 2000
Applied Physics Letters;10/9/2000, Vol. 77 Issue 15
Academic Journal
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 FeBr[sub 2] 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 τ=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.


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