Perturbed Angular Correlation Study of Magnetic and Electric Hyperfine Interactions at 111Cd in GdNi2 and SmNi2 |
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| Authors: | S Müller P de la Presa M Forker |
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| Institution: | (1) Institut für Strahlen- und Kernphysik der Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany;(2) Institut für Strahlen- und Kernphysik der Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany |
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| Abstract: | The magnetic hyperfine field B
hf of the closed-shell probe nucleus 111Cd in the C15 Laves phase RNi2 (R= Gd, Sm) has been investigated as a function of temperature by perturbed angular correlation (PAC) spectroscopy. The saturation magnetic hyperfine fields at 10 K are B
hf=7.7(2) and 3.9(1) T for GdNi2 and SmNi2, respectively. Although the probe nucleus resides on the cubic rare-earth site, a strong axially symmetric electric quadrupole interaction (QI) is observed in the paramagnetic phase at T 300 K. The possible relation of this unexpected QI to the structural instability of RNi2 is discussed. |
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| Keywords: | C15 Laves phases magnetic hyperfine field PAC spectroscopy |
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