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Hyperfine interaction parameters in GdPd2Al3and ground state of CePd2Al3and NpPd2Al3

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
92
Issue
11
Identifiers
DOI: 10.1016/0038-1098(94)90928-8

Abstract

Abstract GdPd 2Al 3 has been studied by 155Gd Mössbauer spectroscopy. This compound was shown to order at 16 K. A pure axial single site quadrupolar spectrum with a rather large and positive V zz was observed in the paramagnetic state. At low temperatures the hyperfine spectrum consists in a superposition of at least two magnetic patterns with different angles between the magnetization and V zz axes. The quadrupolar interaction data were used to evaluate the second order B 0 2 crystal field term in the rare earth RPd 2Al 3 series. The ground state for the Ce 3+ and Np 3+ ions in the CePd 2Al 3 and NpPd 2Al 3 compounds was inferred from the experimental results.

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