Analysis of dielectric and electrical transport properties of NdFeAsO ceramic

Detalhes bibliográficos
Autor(a) principal: Mishra,G. K.
Data de Publicação: 2022
Outros Autores: Mohanty,N. K., Behera,B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200181
Resumo: Abstract The iron-based ceramic NdFeAsO was synthesized by the solid-state reaction method. The tetragonal crystal structure was confirmed at room temperature through the X-ray diffraction technique. The dielectric characteristics i.e. dielectric constant (εr) and loss tangent (tanδ) of the sample were studied at a wide range of temperature and frequencies with an impedance analyzer and revealed that these quantities decreased with an increase in frequency. The dielectric anomalies were observed in the studied sample, which was found to be shifting towards the higher temperature side on increasing the frequency. The analysis of ac conductivity data of the compound obeyed Jonscher’s universal power law as well as the Arrhenius equation. The compound showed a negative temperature coefficient of resistance (NTCR) behavior. The electrical conduction mechanism in the sample can be explained through the correlated barrier hopping (CBH) model.
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spelling Analysis of dielectric and electrical transport properties of NdFeAsO ceramicX-ray diffractionceramic materialsdielectric propertiesconductivitydensity of statesAbstract The iron-based ceramic NdFeAsO was synthesized by the solid-state reaction method. The tetragonal crystal structure was confirmed at room temperature through the X-ray diffraction technique. The dielectric characteristics i.e. dielectric constant (εr) and loss tangent (tanδ) of the sample were studied at a wide range of temperature and frequencies with an impedance analyzer and revealed that these quantities decreased with an increase in frequency. The dielectric anomalies were observed in the studied sample, which was found to be shifting towards the higher temperature side on increasing the frequency. The analysis of ac conductivity data of the compound obeyed Jonscher’s universal power law as well as the Arrhenius equation. The compound showed a negative temperature coefficient of resistance (NTCR) behavior. The electrical conduction mechanism in the sample can be explained through the correlated barrier hopping (CBH) model.Associação Brasileira de Cerâmica2022-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200181Cerâmica v.68 n.386 2022reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132022683863168info:eu-repo/semantics/openAccessMishra,G. K.Mohanty,N. K.Behera,B.eng2022-07-05T00:00:00Zoai:scielo:S0366-69132022000200181Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2022-07-05T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
title Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
spellingShingle Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
Mishra,G. K.
X-ray diffraction
ceramic materials
dielectric properties
conductivity
density of states
title_short Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
title_full Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
title_fullStr Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
title_full_unstemmed Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
title_sort Analysis of dielectric and electrical transport properties of NdFeAsO ceramic
author Mishra,G. K.
author_facet Mishra,G. K.
Mohanty,N. K.
Behera,B.
author_role author
author2 Mohanty,N. K.
Behera,B.
author2_role author
author
dc.contributor.author.fl_str_mv Mishra,G. K.
Mohanty,N. K.
Behera,B.
dc.subject.por.fl_str_mv X-ray diffraction
ceramic materials
dielectric properties
conductivity
density of states
topic X-ray diffraction
ceramic materials
dielectric properties
conductivity
density of states
description Abstract The iron-based ceramic NdFeAsO was synthesized by the solid-state reaction method. The tetragonal crystal structure was confirmed at room temperature through the X-ray diffraction technique. The dielectric characteristics i.e. dielectric constant (εr) and loss tangent (tanδ) of the sample were studied at a wide range of temperature and frequencies with an impedance analyzer and revealed that these quantities decreased with an increase in frequency. The dielectric anomalies were observed in the studied sample, which was found to be shifting towards the higher temperature side on increasing the frequency. The analysis of ac conductivity data of the compound obeyed Jonscher’s universal power law as well as the Arrhenius equation. The compound showed a negative temperature coefficient of resistance (NTCR) behavior. The electrical conduction mechanism in the sample can be explained through the correlated barrier hopping (CBH) model.
publishDate 2022
dc.date.none.fl_str_mv 2022-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200181
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132022000200181
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0366-69132022683863168
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.68 n.386 2022
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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