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Localized 4f states and dynamic Jahn-Teller effect in PrO2

Localized 4f states and dynamic Jahn-Teller effect in PrO2
Localized 4f states and dynamic Jahn-Teller effect in PrO2
Neutron spectroscopic measurements of the magnetic excitations in PrO2 reveal (1) sharp peaks characteristic of transitions between levels of the 4f(1) configuration of Pr4+ split by the cubic crystal field, and (2) broad bands of scattering centered near 30 and 160 meV. We present a simple model based on a vibronic Hamiltonian that accounts for these contrasting features of the data. The analysis shows that 90% +/- 10% of the Pr ions have a localized 4f(1) configuration and provides strong evidence for a dynamic Jahn-Teller effect in the Gamma (8) electronic ground state.
x-ray-absorption, rare-earth compounds, valence, ceo2, spectroscopy, spectra, oxides, prba2cu3o7, tbo2
0031-9007
2082-2085
Boothroyd, A.T.
ebeac59a-2338-4c2b-b79b-826dba212ac5
Gardiner, C.H.
1e64d07d-8b2d-4b9b-b9b5-eb2404418d42
Lister, S.J.S.
dc683e62-34d6-45e4-b994-d90ab7685ae0
Santini, P.
ea6fbf2f-4b27-4bf7-b05b-651a86cbcdc1
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Noailles, L.D.
6f23d9a0-ca04-49b2-b5e2-5f7430fa4c4e
Currie, D.B.
3d6d5e9e-ac15-43f5-8009-e1ad1a2cacde
Eccleston, R.S.
1986e57a-28af-4bf7-b3da-7ae08271e31d
Bewley, R.I.
737eb157-f5d9-4cc0-bea2-d53c194a998e
Boothroyd, A.T.
ebeac59a-2338-4c2b-b79b-826dba212ac5
Gardiner, C.H.
1e64d07d-8b2d-4b9b-b9b5-eb2404418d42
Lister, S.J.S.
dc683e62-34d6-45e4-b994-d90ab7685ae0
Santini, P.
ea6fbf2f-4b27-4bf7-b05b-651a86cbcdc1
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Noailles, L.D.
6f23d9a0-ca04-49b2-b5e2-5f7430fa4c4e
Currie, D.B.
3d6d5e9e-ac15-43f5-8009-e1ad1a2cacde
Eccleston, R.S.
1986e57a-28af-4bf7-b3da-7ae08271e31d
Bewley, R.I.
737eb157-f5d9-4cc0-bea2-d53c194a998e

Boothroyd, A.T., Gardiner, C.H., Lister, S.J.S., Santini, P., Rainford, B.D., Noailles, L.D., Currie, D.B., Eccleston, R.S. and Bewley, R.I. (2001) Localized 4f states and dynamic Jahn-Teller effect in PrO2. Physical Review Letters, 86 (10), 2082-2085.

Record type: Article

Abstract

Neutron spectroscopic measurements of the magnetic excitations in PrO2 reveal (1) sharp peaks characteristic of transitions between levels of the 4f(1) configuration of Pr4+ split by the cubic crystal field, and (2) broad bands of scattering centered near 30 and 160 meV. We present a simple model based on a vibronic Hamiltonian that accounts for these contrasting features of the data. The analysis shows that 90% +/- 10% of the Pr ions have a localized 4f(1) configuration and provides strong evidence for a dynamic Jahn-Teller effect in the Gamma (8) electronic ground state.

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More information

Published date: 5 March 2001
Keywords: x-ray-absorption, rare-earth compounds, valence, ceo2, spectroscopy, spectra, oxides, prba2cu3o7, tbo2

Identifiers

Local EPrints ID: 19419
URI: https://eprints.soton.ac.uk/id/eprint/19419
ISSN: 0031-9007
PURE UUID: c5eb7d8f-a48a-433d-ac92-3f08a26e6032

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Date deposited: 14 Feb 2006
Last modified: 22 Oct 2017 02:47

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Contributors

Author: A.T. Boothroyd
Author: C.H. Gardiner
Author: S.J.S. Lister
Author: P. Santini
Author: B.D. Rainford
Author: L.D. Noailles
Author: D.B. Currie
Author: R.S. Eccleston
Author: R.I. Bewley

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