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...

Descripción completa

Detalles Bibliográficos
Autores principales: Lopes, A M, Araújo, J P, Amaral, V S, Correia, G, Tomioka, Y, Tokura, Y
Lenguaje:eng
Publicado: 2008
Materias:
Condensed Matter
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.100.155702
http://cds.cern.ch/record/1110724
_version_ 1780914283934121984
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
work_keys_str_mv AT lopesam newphasetransitioninthepr1xcaxmno3systemevidenceforelectricalpolarizationinchargeorderedmanganites
AT araujojp newphasetransitioninthepr1xcaxmno3systemevidenceforelectricalpolarizationinchargeorderedmanganites
AT amaralvs newphasetransitioninthepr1xcaxmno3systemevidenceforelectricalpolarizationinchargeorderedmanganites
AT correiag newphasetransitioninthepr1xcaxmno3systemevidenceforelectricalpolarizationinchargeorderedmanganites
AT tomiokay newphasetransitioninthepr1xcaxmno3systemevidenceforelectricalpolarizationinchargeorderedmanganites
AT tokuray newphasetransitioninthepr1xcaxmno3systemevidenceforelectricalpolarizationinchargeorderedmanganites

Ejemplares similares