| Issue |
Europhys. Lett.
Volume 74, Number 4, May 2006
|
|
|---|---|---|
| Page(s) | 672 - 678 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10563-6 | |
| Published online | 05 April 2006 | |
Verwey-type transition in 
1
Institut für Anorganische Chemie und Analytische Chemie Johannes Gutenberg Universität - D-55099 Mainz, Germany
2
Institut für Anorganische Chemie und Strukturchemie II Heinrich-Heine-Universität - D-40225 Düsseldorf, Germany
Received:
8
December
2005
Accepted:
10
March
2006
High temperature 151Eu Mössbauer measurements provide proof
for inhomogeneous mixed-valent behaviour in . We observed that
undergoes a Verwey-type charge delocalisation transition when heated
above 
prior to the structural γ-β phase transition at 
.
This finding confirms the results of photoemission spectroscopy in the isostructural compound EuPdP and
of TB-LMTO-ASA band structure calculations.
We discuss the role of a van Hove singularity associated with a high density
of 4f states close to the Fermi energy in inhomogeneous mixed europium
valency, and the microscopic mechanism of γ-β phase transition
in compounds analogous to .
PACS: 71.20.-b – Electron density of states and band structure of crystalline solids / 76.80.+y – Mössbauer effect, other gamma-ray spectroscopy
© EDP Sciences, 2006
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