Magneto-thermal properties of Gd3(Ga1-xAlx)5O12 single crystals.
- 1 January 1985
- journal article
- Published by Cryogenic Association of Japan in Teion Kogaku (Journal of Cryogenics and Superconductivity Society of Japan)
- Vol. 20 (5) , 269-273
- https://doi.org/10.2221/jcsj.20.269
Abstract
To study magnetic refrigerants useful at low temperatures below 20K, new pseudo-binary garnet single crystals of Gd3(Ga1-xAlx)5O12 with x=0.1, 0.2, 0.3 and 0.4, having about 25mm in diameter and 50mm in length, have been grown using the Czochralski technique. The effective magnetic moments p of the crystals are about 7.9μB, independent of x, and the paramagnetic Curie temperatures θp are-0.60 to -1.11K, showing the minimum at x=0.2. Based on magnetic measurements and adiabatic demagnetization experiments in magnetic fields up to 75 and 60kOe, respectively, the magnetic entropy change ΔSM and the entropy S are estimated to be almost the same for all the crystals.Keywords
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