Determination of Exchange Constants from Relaxation Specific Heat Measurements on GdCl3
- 1 March 1965
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 36 (3) , 1027-1028
- https://doi.org/10.1063/1.1714085
Abstract
Measurements of the magnetic contribution to the specific heat have been made on polycrystalline samples of GdCl3 at temperatures between 20° and 77°K, using a relaxation method with frequencies up to 40 Mc/sec. The results, when combined with the Weiss constant determined by Marquard and Wyatt, give two sets of values for the nearest‐ and next‐nearest‐neighbor exchange interaction between Gd3+ ions. The first set gives ferromagnetic values for both Jnn(+0.071±0.005°K) and Jnnn(+0.011±0.005°K), while the other gives a small antiferromagnetic Jnn(−0.020±0.011°K) and a larger ferromagnetic Jnnn(+0.041±0.002°K). These results are discussed in terms of other experimental data.This publication has 1 reference indexed in Scilit:
- Nuclear resonance absorption circuitJournal of Scientific Instruments, 1959