Journal article
Polymorphic Phase Transformation in In2La and CeIn2
Hyperfine Interactions, Vol.158(1), pp.305-308
11/2004
Handle:
https://hdl.handle.net/2376/122076
Abstract
Nuclear quadrupole interactions of 111Cd probes in In2La and CeIn2 were measured using perturbed angular correlation of gamma rays (PAC). Near room temperature, a single non-axially symmetric quadrupole interaction was observed in each compound, with ω
0 = eQV
zz
/ℏ = 78.8(2) Mrad/s and η = 0.312(1) for In2La at 11°C and ω
0 = 80(1) Mrad/s and η = 0.29(2) for CeIn2 at 34°C. The observed non-axial symmetry is consistent with the reported CeCu2 structure of the phases. The non-axially symmetric interactions were replaced completely by axially symmetric interactions (η = 0) at 524°C, with ω
0 = 101.0(1) Mrad/s in In2La and ω
0 = 96.9(4) Mrad/s in CeIn2. The change in symmetry is attributed to a polymorphic phase transformation. Based on symmetry information from the quadrupole interaction and on chemical arguments, it is proposed that high-temperature phases of In2La and CeIn2 both have the AlB2 (C32) structure.
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Details
- Title
- Polymorphic Phase Transformation in In2La and CeIn2
- Creators
- Egbert Nieuwenhuis - Washington State UniversityAurélie Favrot - Washington State UniversityLi Kang - Washington State UniversityMatthew Zacate - Washington State UniversityGary Collins - Washington State University
- Publication Details
- Hyperfine Interactions, Vol.158(1), pp.305-308
- Publisher
- Springer Netherlands
- Identifiers
- 99900646681301842
- Language
- English
- Resource Type
- Journal article