| Authors |
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| Publication date |
2002
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| Journal |
Applied Physics. A, Materials Science & Processing
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| Volume | Issue number |
74 | suppl.1
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| Pages (from-to) |
1345-1347
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| Organisations |
-
Faculty of Science (FNWI) - Institute of Physics (IoP) - Van der Waals-Zeeman Institute (WZI)
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| Abstract |
The unusual phase transition at 20 K in Ni(NH3)6(PF6)2 in which there is no change of symmetry is investigated via the quantum-rotational spectrum of a series of mixed NixCo(1-x)(NH3)6(PF6)2 crystals. Below x=0.65 the spectra reveal the lattice of the high-temperature phase of Ni(NH3)6(PF6)2, whilst above this composition the low-temperature phase is present. This observation is in contrast to the smooth transition as a function of composition that was expected, in which the dynamics is characterized by many closely spaced shallow potential-energy minima.
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| Document type |
Article
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