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Structure and electrical resistivity of mixed-valent EuNi2P2 at high pressure

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Medvedev,  S. A.
Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Naumov,  P.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Barkalov,  O.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Shekhar,  C.
Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  C.
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Medvedev, S. A., Naumov, P., Barkalov, O., Shekhar, C., Palasyuk, T., Ksenofontov, V., et al. (2014). Structure and electrical resistivity of mixed-valent EuNi2P2 at high pressure. Journal of Physics: Condensed Matter, 26: 335701, pp. 1-5. doi:10.1088/0953-8984/26/33/335701.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0023-CE78-2
Abstract
The structural properties and electrical resistivity of homogeneous mixed-valent EuNi2P2 are studied at pressures up to 45?GPa. No structural phase transition is observed in the whole pressure range and the overall pressure behavior of the structural parameters is similar to that of related compounds in the collapsed tetragonal ThCr2Si2-type structure. Electrical resistivity measured up to 31?GPa at temperatures between 4 and 300?K exhibits continuous changes from the behavior typical for a mixed-valent Eu system to that of a normal metallic system at pressures above 20?GPa, indicating a transition of the strongly mixed-valent Eu atoms with a valence ~2.5 towards a pure trivalent state. No superconductivity was observed in the whole studied pressure-temperature range.