Adiabatic Demagnetization of MnCl2 with the Magnetic Field Parallel to the b Magnetic Axis

Publisher Website
Google Scholar
Abstract
Adiabatic measurements on single‐crystal MnCl2 as a function of magnetic field have been tested as isentropics for use with isoerstedic heat capacity data in a ``saw‐tooth'' method of establishing entropy values as a function of field and temperature in the region above 1°K where absolute temperatures are readily available. All measurements were made with the field parallel to the b magnetic axis. Adiabatics with an entropy less than about 0.6 gibbs/mole became irreversible at some unknown temperature below 1°K. However, determinations of the differential magnetic susceptibility on these adiabatics disclosed three high peaks at low temperatures and fields of about 4, 13, and 15 kG. The peaks are evidence of substantial but gradual magnetic structural changes which are much more complex than previously realized. The correction of data obtained during demagnetization for minor heat leak to give true entropy values is discussed.

This publication has 10 references indexed in Scilit: