Heavily doped M1−xUxF2+2x fluorites studied by quasielastic neutron scattering(M=Ba) and specific heat measurements (M=Pb)

Niels Hessel Andersen; Kurt Nørgaard Clausen; Jørgen Kjems

doi:10.1016/0167-2738(83)90292-8

Heavily doped M1−xUxF2+2x fluorites studied by quasielastic neutron scattering(M=Ba) and specific heat measurements (M=Pb)

Niels Hessel Andersen, Kurt Nørgaard Clausen, Jørgen Kjems

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The thermal generation of defects in pure and doped Pb1−xUxF2+2x (x=0, 0.05and0.10) has been studied by specific heat measurements between 475 k and 875 k. A simple phenomenological mean field thermodynamic model has been developed and used to interpret the data. At low temperatures the result of doping is an increase of the thermally generated defect concentration; at high temperatures the effect is reversed. The microscopic defect structure of Ba0.9U0.1F2.2 has been studied by diffuse quasielastic neutron scattering experiments at room temperature. The experimental observations are in good agreement with a model calculation based on a defect structure of 212-clusters.

Original language	English
Journal	Solid State Ionics
Volume	9-10
Issue number	1
Pages (from-to)	543-548
ISSN	0167-2738
DOIs	https://doi.org/10.1016/0167-2738(83)90292-8
Publication status	Published - 1983

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title = "Heavily doped M1−xUxF2+2x fluorites studied by quasielastic neutron scattering(M=Ba) and specific heat measurements (M=Pb)",

abstract = "The thermal generation of defects in pure and doped Pb1−xUxF2+2x (x=0, 0.05and0.10) has been studied by specific heat measurements between 475 k and 875 k. A simple phenomenological mean field thermodynamic model has been developed and used to interpret the data. At low temperatures the result of doping is an increase of the thermally generated defect concentration; at high temperatures the effect is reversed. The microscopic defect structure of Ba0.9U0.1F2.2 has been studied by diffuse quasielastic neutron scattering experiments at room temperature. The experimental observations are in good agreement with a model calculation based on a defect structure of 212-clusters.",

author = "Andersen, {Niels Hessel} and Clausen, {Kurt N{\o}rgaard} and J{\o}rgen Kjems",

year = "1983",

doi = "10.1016/0167-2738(83)90292-8",

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pages = "543--548",

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T1 - Heavily doped M1−xUxF2+2x fluorites studied by quasielastic neutron scattering(M=Ba) and specific heat measurements (M=Pb)

AU - Andersen, Niels Hessel

AU - Clausen, Kurt Nørgaard

AU - Kjems, Jørgen

PY - 1983

Y1 - 1983

N2 - The thermal generation of defects in pure and doped Pb1−xUxF2+2x (x=0, 0.05and0.10) has been studied by specific heat measurements between 475 k and 875 k. A simple phenomenological mean field thermodynamic model has been developed and used to interpret the data. At low temperatures the result of doping is an increase of the thermally generated defect concentration; at high temperatures the effect is reversed. The microscopic defect structure of Ba0.9U0.1F2.2 has been studied by diffuse quasielastic neutron scattering experiments at room temperature. The experimental observations are in good agreement with a model calculation based on a defect structure of 212-clusters.

AB - The thermal generation of defects in pure and doped Pb1−xUxF2+2x (x=0, 0.05and0.10) has been studied by specific heat measurements between 475 k and 875 k. A simple phenomenological mean field thermodynamic model has been developed and used to interpret the data. At low temperatures the result of doping is an increase of the thermally generated defect concentration; at high temperatures the effect is reversed. The microscopic defect structure of Ba0.9U0.1F2.2 has been studied by diffuse quasielastic neutron scattering experiments at room temperature. The experimental observations are in good agreement with a model calculation based on a defect structure of 212-clusters.

U2 - 10.1016/0167-2738(83)90292-8

DO - 10.1016/0167-2738(83)90292-8

M3 - Journal article

SN - 0167-2738

VL - 9-10

SP - 543

EP - 548

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1

ER -

Heavily doped M1−xUxF2+2x fluorites studied by quasielastic neutron scattering(M=Ba) and specific heat measurements (M=Pb)

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