Magnetic properties of an antiferromagnetic two-singlet system. II. Results on terbium aluminum garnet
- 1 January 1973
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 34 (1) , 27-34
- https://doi.org/10.1051/jphys:0197300340102700
Abstract
The metamagnetic properties of terbium aluminum garnet, which is a six-sublattice antiferromagnet (TN = 1.35 °K) are studied : the magnetization and differential susceptibility curves as functions of the external magnetic field are reported for different crystallographic directions and temperatures from 0.36 °K to 1 °K. These results are analysed within the frame of the molecular-field approximation in terms of the two-singlet model appropriate for TbAlG, taking into account some exchange along with the dipolar interactions preponderant in rare-earth aluminum garnets. The interaction constants found are confirmed by the value of the magnetic energy at 0 °K deduced from specific heat measurements between 0.35 °K and 4.2 °KKeywords
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