A New Multipolar Ordering Compound, Rare-Earth Palladium Bronze PrPd3S4
摘要:
Specific heat and magnetization measurements were performed on single crystalline PrPd3S4. A lambda-type anomaly at T-M = 1.56 K in the specific heat shifts to higher temperatures by magnetic fields, begins to shift to lower temperatures above 2T, and disappears above 3.6T. The 4f ground state of Pr3+ was deduced to be a magnetic triplet. Below T-M, the magnetic susceptibility increases while no spontaneous magnetization appears. These results strongly reveal that PrPd3S4 shows a multipolar ordering at T-M. The most probable ordering state for PrPd3S4 is an antiferroquadrupolar (AFQ) ordering since the B-T phase diagrams are of the "re-entrant" type, which is typical for AFQ ordering compounds.
Specific heat and magnetization measurements were performed on single crystalline PrPd3S4. A lambda-type anomaly at T-M = 1.56 K in the specific heat shifts to higher temperatures by magnetic fields, begins to shift to lower temperatures above 2T, and disappears above 3.6T. The 4f ground state of Pr3+ was deduced to be a magnetic triplet. Below T-M, the magnetic susceptibility increases while no spontaneous magnetization appears. These results strongly reveal that PrPd3S4 shows a multipolar ordering at T-M. The most probable ordering state for PrPd3S4 is an antiferroquadrupolar (AFQ) ordering since the B-T phase diagrams are of the "re-entrant" type, which is typical for AFQ ordering compounds.