De Haas-van Alphen effect and fermi surface properties of EuPd₃ with the trivalent electronic state

EuPd₃, which is in the trivalent (Eu³⁺) electronic state, is a rare compound because most Eu compounds are in the divalent (Eu²⁺) electronic state and order magnetically. The electronic state of EuPd₃ was previously studied by Mössbauer, magnetic susceptibility, and X-ray absorption experiments using polycrystalline samples. We succeeded in growing single crystals of EuPd₃ by the Bridgeman method and carried out a de Haas-van Alphen (dHvA) experiment. The dHvA branches detected in EuPd₃ are well explained by the results of the full potential linear augmented plane wave (FLAPW) energy band calculation based on a local density approximation (LDA) with additional treatments for EuPd₃, revealing the trivalent electronic state. Conduction electrons are mainly Pd-4d electrons. The cyclotron effective masses are determined from the temperature dependence of the dHvA amplitude, ranging from 0.3 to 1.0m₀ (m₀: rest mass of an electron), which are also consistent with the corresponding band masses.