Quasielastic thermal neutron scattering experiment on the proton conductor SrCe0.95Yb0.05H0.02O2.985

Th Matzke; U. Stimming; Ch Karmonik; M. Soetratmo; R. Hempelmann; F. Güthoff

doi:10.1016/0167-2738(96)00223-8

Quasielastic thermal neutron scattering experiment on the proton conductor SrCe_0.95Yb_0.05H_0.02O_2.985

Th Matzke, U. Stimming, Ch Karmonik, M. Soetratmo, R. Hempelmann, F. Güthoff

Research output: Contribution to journal › Article › peer-review

126 Scopus citations

Abstract

On the basis of a QENS experiment using thermal neutrons on the proton conductor SrCe_0.95Yb_0.05H_0.02O_2.985 we extend our two-state model for the proton diffusion in this compound. This model was developed from a recent high resolution QENS experiment using cold neutrons, with the first state representing free diffusion of the protons (jumping from oxygen to oxygen forming OH ; free state) and the second state representing protons trapped on energetically lowered sites (nearby an Yb³⁺ ion on a Ce⁴⁺ site; trapped state); into this model we integrate a very fast localized motion taking place in the free state as a reorientation of the OH^.. ions. This motion is visible as a broad quasielastic component in the neutron energy spectra and exhibits a very low activation energy.

Original language	English (US)
Pages (from-to)	621-628
Number of pages	8
Journal	Solid State Ionics
Volume	86-88
Issue number	PART 1
DOIs	https://doi.org/10.1016/0167-2738(96)00223-8
State	Published - Jul 1996

Keywords

Proton conductor
Quasielastic neutron scattering
Thermal neutrons

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/0167-2738(96)00223-8

Cite this

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title = "Quasielastic thermal neutron scattering experiment on the proton conductor SrCe0.95Yb0.05H0.02O2.985",

abstract = "On the basis of a QENS experiment using thermal neutrons on the proton conductor SrCe0.95Yb0.05H0.02O2.985 we extend our two-state model for the proton diffusion in this compound. This model was developed from a recent high resolution QENS experiment using cold neutrons, with the first state representing free diffusion of the protons (jumping from oxygen to oxygen forming OH ; free state) and the second state representing protons trapped on energetically lowered sites (nearby an Yb3+ ion on a Ce4+ site; trapped state); into this model we integrate a very fast localized motion taking place in the free state as a reorientation of the OH.. ions. This motion is visible as a broad quasielastic component in the neutron energy spectra and exhibits a very low activation energy.",

keywords = "Proton conductor, Quasielastic neutron scattering, Thermal neutrons",

author = "Th Matzke and U. Stimming and Ch Karmonik and M. Soetratmo and R. Hempelmann and F. G{\"u}thoff",

note = "Funding Information: We thank M. Pionke for his help during the experiment. Financial support by the Fond der Chemischen Industrie and by the Deutsche For-schungsgemeinschaft in the framework of the “Schwerpunktprogramm Multifunktionswerkstoffe” is gratefully acknowledged.",

year = "1996",

month = jul,

doi = "10.1016/0167-2738(96)00223-8",

language = "English (US)",

volume = "86-88",

pages = "621--628",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

number = "PART 1",

}

TY - JOUR

T1 - Quasielastic thermal neutron scattering experiment on the proton conductor SrCe0.95Yb0.05H0.02O2.985

AU - Matzke, Th

AU - Stimming, U.

AU - Karmonik, Ch

AU - Soetratmo, M.

AU - Hempelmann, R.

AU - Güthoff, F.

N1 - Funding Information: We thank M. Pionke for his help during the experiment. Financial support by the Fond der Chemischen Industrie and by the Deutsche For-schungsgemeinschaft in the framework of the “Schwerpunktprogramm Multifunktionswerkstoffe” is gratefully acknowledged.

PY - 1996/7

Y1 - 1996/7

N2 - On the basis of a QENS experiment using thermal neutrons on the proton conductor SrCe0.95Yb0.05H0.02O2.985 we extend our two-state model for the proton diffusion in this compound. This model was developed from a recent high resolution QENS experiment using cold neutrons, with the first state representing free diffusion of the protons (jumping from oxygen to oxygen forming OH ; free state) and the second state representing protons trapped on energetically lowered sites (nearby an Yb3+ ion on a Ce4+ site; trapped state); into this model we integrate a very fast localized motion taking place in the free state as a reorientation of the OH.. ions. This motion is visible as a broad quasielastic component in the neutron energy spectra and exhibits a very low activation energy.

AB - On the basis of a QENS experiment using thermal neutrons on the proton conductor SrCe0.95Yb0.05H0.02O2.985 we extend our two-state model for the proton diffusion in this compound. This model was developed from a recent high resolution QENS experiment using cold neutrons, with the first state representing free diffusion of the protons (jumping from oxygen to oxygen forming OH ; free state) and the second state representing protons trapped on energetically lowered sites (nearby an Yb3+ ion on a Ce4+ site; trapped state); into this model we integrate a very fast localized motion taking place in the free state as a reorientation of the OH.. ions. This motion is visible as a broad quasielastic component in the neutron energy spectra and exhibits a very low activation energy.

KW - Proton conductor

KW - Quasielastic neutron scattering

KW - Thermal neutrons

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U2 - 10.1016/0167-2738(96)00223-8

DO - 10.1016/0167-2738(96)00223-8

M3 - Article

AN - SCOPUS:0030181651

SN - 0167-2738

VL - 86-88

SP - 621

EP - 628

JO - Solid State Ionics

JF - Solid State Ionics

IS - PART 1

ER -