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Journal Article

Low temperature magnetic behavior in CePtGa3

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Tang, J., Gschneider, K. A., Caspary, R., & Steglich, F. (1990). Low temperature magnetic behavior in CePtGa3. Physica B-Condensed Matter, 163(1-3), 201-204. doi:10.1016/0921-4526(90)90168-T.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-D527-7
A low temperature study of CePtGa3 shows a peak in the heat capacity of ∼2.8 J/mol Ce K at 1.7 K, which is shifted to higher temperatures (∼6 K at 9.8 T) in magnetic fields. Furthermore, the heat capacity data are consistent with spin-glass-like behavior. The 8 T field data below 0.2 K suggests a γ of ∼120 mJ/mol Ce K2. AC magnetic susceptibility data as a function of the magnetic field (up to 2 T) suggests some small fraction of the Ce spins are involved with percolating antiferromagnetic clusters. Unlike the ordinary spin glasses, the Ce3+ ions in CePtGa3 occupy periodic lattice sites. The random RKKY interactions between spins which provides the basis for spin-glass-like behavior is induced by the random distribution of Pt and Ga atoms around the Ce3+ ions.