AustralieFrV1, Main, Exploration, bibRecord, 008768

Orbital domain dynamics in a doped manganite

Identifieur interne : 008768 ( Main/Exploration ); précédent : 008767; suivant : 008769

Orbital domain dynamics in a doped manganite

Auteurs : J J Turner [États-Unis] ; K J Thomas [États-Unis] ; J P Hill [États-Unis] ; M A Pfeifer [États-Unis, Australie] ; K. Chesnel [États-Unis, France] ; Y. Tomioka [Japon] ; Y. Tokura [Japon] ; S D Kevan [États-Unis]

Source :

New Journal of Physics [ 1367-2630 ] ; 2008.

RBID : ISTEX:1E53081645EED0C342507161A33987F0C3F3706D

English descriptors

Abstract

We explore a number of novel effects near the orbital-order phase transition in a half-doped manganite, Pr0.5Ca0.5MnO3. To probe the unusual short-range orbital order in this system, we have performed coherent soft x-ray resonant scattering measurements in a Bragg geometry to measure dynamics. Near the transition temperature, we observe a small fluctuating component in the scattered signal that is correlated with three effects: a rapidly decreasing total signal and orbital domain size, as well as an abrupt onset of a broad background intensity that we attribute to the thermal production of correlated polarons. Our speckle results suggest that the transition is characterized by a competition between a pinned orbital domain topology that remains static and mobile domain boundaries that exhibit slow, temporal fluctuations.

Url:

https://api.istex.fr/document/1E53081645EED0C342507161A33987F0C3F3706D/fulltext/pdf

DOI: 10.1088/1367-2630/10/5/053023

Affiliations:

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<wicri:regionArea>Present address: Department of Physics, La Trobe University, Victoria 3086</wicri:regionArea>
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<wicri:regionArea>Department of Applied Physics, University of Tokyo, Tokyo 113-8656</wicri:regionArea>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bragg</term>
<term>Bragg peak</term>
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<term>Charge order</term>
<term>Coherent illumination</term>
<term>Correlated polarons</term>
<term>Correlation length</term>
<term>Domain</term>
<term>Domain properties</term>
<term>Domain size</term>
<term>Domain structure</term>
<term>Domain wall</term>
<term>Domain wall motion</term>
<term>Domain walls</term>
<term>Doped manganite</term>
<term>Dynamics</term>
<term>Experimental procedures</term>
<term>Exposure time</term>
<term>Gure</term>
<term>Gures</term>
<term>Lawrence berkeley</term>
<term>Lett</term>
<term>Long times</term>
<term>Lorentzian amplitude</term>
<term>Lower signal</term>
<term>Magnetic order</term>
<term>Manganite</term>
<term>Manganites phys</term>
<term>Mesoscopic physics</term>
<term>Mno3</term>
<term>Mno3 phys</term>
<term>Mno4 phys</term>
<term>Narrow range</term>
<term>Orbital</term>
<term>Orbital bragg peak</term>
<term>Orbital correlations</term>
<term>Orbital domain size</term>
<term>Orbital domains</term>
<term>Orbital order</term>
<term>Order parameter</term>
<term>Phase transition</term>
<term>Phys</term>
<term>Quenched disorder</term>
<term>Reciprocal lattice vector</term>
<term>Resonant enhancement</term>
<term>Sample temperature</term>
<term>Slow dynamics</term>
<term>Speckle</term>
<term>Speckle pattern</term>
<term>Speckle patterns</term>
<term>Speckle structure</term>
<term>Static structure</term>
<term>Temperature dependence</term>
<term>Temperature range</term>
<term>Time evolution</term>
<term>Time scans</term>
<term>Transition metal oxides</term>
<term>Transition temperature</term>
<term>Uctuating component</term>
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<term>Domain properties</term>
<term>Domain size</term>
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<term>Domain wall</term>
<term>Domain wall motion</term>
<term>Domain walls</term>
<term>Doped manganite</term>
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<term>Lawrence berkeley</term>
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<term>Mesoscopic physics</term>
<term>Mno3</term>
<term>Mno3 phys</term>
<term>Mno4 phys</term>
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<term>Orbital correlations</term>
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<term>Orbital domains</term>
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<term>Order parameter</term>
<term>Phase transition</term>
<term>Phys</term>
<term>Quenched disorder</term>
<term>Reciprocal lattice vector</term>
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<term>Temperature dependence</term>
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<front><div type="abstract">We explore a number of novel effects near the orbital-order phase transition in a half-doped manganite, Pr0.5Ca0.5MnO3. To probe the unusual short-range orbital order in this system, we have performed coherent soft x-ray resonant scattering measurements in a Bragg geometry to measure dynamics. Near the transition temperature, we observe a small fluctuating component in the scattered signal that is correlated with three effects: a rapidly decreasing total signal and orbital domain size, as well as an abrupt onset of a broad background intensity that we attribute to the thermal production of correlated polarons. Our speckle results suggest that the transition is characterized by a competition between a pinned orbital domain topology that remains static and mobile domain boundaries that exhibit slow, temporal fluctuations.</div>
</front>
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Orbital domain dynamics in a doped manganite

Orbital domain dynamics in a doped manganite

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri