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New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites
In this Letter a detailed study of the electric field gradient (EFG) across the Pr1-xCaxMnO3 phase diagram and its temperature dependence is given. Clearly, distinct EFG behavior for samples outside or inside the charge order (CO) region are observed. The EFG temperature dependence evidences a new p...
Autores principales: | , , , , , |
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Lenguaje: | eng |
Publicado: |
2008
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.100.155702 http://cds.cern.ch/record/1110724 |
_version_ | 1780914283934121984 |
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author | Lopes, A M Araújo, J P Amaral, V S Correia, G Tomioka, Y Tokura, Y |
author_facet | Lopes, A M Araújo, J P Amaral, V S Correia, G Tomioka, Y Tokura, Y |
author_sort | Lopes, A M |
collection | CERN |
description | In this Letter a detailed study of the electric field gradient (EFG) across the Pr1-xCaxMnO3 phase diagram and its temperature dependence is given. Clearly, distinct EFG behavior for samples outside or inside the charge order (CO) region are observed. The EFG temperature dependence evidences a new phase transition occurring over the broad CO region of the phase diagram. This transition is discontinuous and occurs at temperatures between the charge ordering and the Néel temperatures. The prominent features observed in the EFG are associated with polar atomic vibrations which eventually lead to a spontaneous local electric polarization below CO transition. |
id | cern-1110724 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2008 |
record_format | invenio |
spelling | cern-11107242019-09-30T06:29:59Zdoi:10.1103/PhysRevLett.100.155702http://cds.cern.ch/record/1110724engLopes, A MAraújo, J PAmaral, V SCorreia, GTomioka, YTokura, YNew Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered ManganitesCondensed MatterIn this Letter a detailed study of the electric field gradient (EFG) across the Pr1-xCaxMnO3 phase diagram and its temperature dependence is given. Clearly, distinct EFG behavior for samples outside or inside the charge order (CO) region are observed. The EFG temperature dependence evidences a new phase transition occurring over the broad CO region of the phase diagram. This transition is discontinuous and occurs at temperatures between the charge ordering and the Néel temperatures. The prominent features observed in the EFG are associated with polar atomic vibrations which eventually lead to a spontaneous local electric polarization below CO transition.oai:cds.cern.ch:11107242008 |
spellingShingle | Condensed Matter Lopes, A M Araújo, J P Amaral, V S Correia, G Tomioka, Y Tokura, Y New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites |
title | New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites |
title_full | New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites |
title_fullStr | New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites |
title_full_unstemmed | New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites |
title_short | New Phase Transition in the $Pr_{1-x}Ca_{x}MnO_{3}$ System: Evidence for Electrical Polarization in Charge Ordered Manganites |
title_sort | new phase transition in the $pr_{1-x}ca_{x}mno_{3}$ system: evidence for electrical polarization in charge ordered manganites |
topic | Condensed Matter |
url | https://dx.doi.org/10.1103/PhysRevLett.100.155702 http://cds.cern.ch/record/1110724 |
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