A comparative study of NiZn ferrites modified by the addition of cobalt

Detalhes bibliográficos
Autor(a) principal: Pereira,S.L.
Data de Publicação: 1999
Outros Autores: Pfannes,H.-D., Mendes Filho,A.A., Pinto,L.C.B. de Miranda, Chíncaro,M.A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020
Resumo: Off-stoichiometric NiZn ferrite was obtained by hydrothermal process and compacted in torus form under different pressures. Two samples A1 and A2 - cobalt doped (0.5 %) were sintered at 1573 K in air atmosphere during 3 h. The magnetic properties were studied by vibrating sample magnetometry, Mössbauer spectroscopy and complex impedanciometry. X-ray diffraction and Hg porosimetry were used in order to determine the average grain size and the type of packing in the samples. Both samples exhibited superparamagnetic behavior in the hysteresis loop. This effect does not agree with Mössbauer results, which were fitted using Normos, a commercial computer program. All samples parameters were compared.
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spelling A comparative study of NiZn ferrites modified by the addition of cobaltNiZn ferritesOff-stoichiometric NiZn ferrite was obtained by hydrothermal process and compacted in torus form under different pressures. Two samples A1 and A2 - cobalt doped (0.5 %) were sintered at 1573 K in air atmosphere during 3 h. The magnetic properties were studied by vibrating sample magnetometry, Mössbauer spectroscopy and complex impedanciometry. X-ray diffraction and Hg porosimetry were used in order to determine the average grain size and the type of packing in the samples. Both samples exhibited superparamagnetic behavior in the hysteresis loop. This effect does not agree with Mössbauer results, which were fitted using Normos, a commercial computer program. All samples parameters were compared.ABM, ABC, ABPol1999-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020Materials Research v.2 n.3 1999reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14391999000300020info:eu-repo/semantics/openAccessPereira,S.L.Pfannes,H.-D.Mendes Filho,A.A.Pinto,L.C.B. de MirandaChíncaro,M.A.eng2000-01-21T00:00:00Zoai:scielo:S1516-14391999000300020Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2000-01-21T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv A comparative study of NiZn ferrites modified by the addition of cobalt
title A comparative study of NiZn ferrites modified by the addition of cobalt
spellingShingle A comparative study of NiZn ferrites modified by the addition of cobalt
Pereira,S.L.
NiZn ferrites
title_short A comparative study of NiZn ferrites modified by the addition of cobalt
title_full A comparative study of NiZn ferrites modified by the addition of cobalt
title_fullStr A comparative study of NiZn ferrites modified by the addition of cobalt
title_full_unstemmed A comparative study of NiZn ferrites modified by the addition of cobalt
title_sort A comparative study of NiZn ferrites modified by the addition of cobalt
author Pereira,S.L.
author_facet Pereira,S.L.
Pfannes,H.-D.
Mendes Filho,A.A.
Pinto,L.C.B. de Miranda
Chíncaro,M.A.
author_role author
author2 Pfannes,H.-D.
Mendes Filho,A.A.
Pinto,L.C.B. de Miranda
Chíncaro,M.A.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Pereira,S.L.
Pfannes,H.-D.
Mendes Filho,A.A.
Pinto,L.C.B. de Miranda
Chíncaro,M.A.
dc.subject.por.fl_str_mv NiZn ferrites
topic NiZn ferrites
description Off-stoichiometric NiZn ferrite was obtained by hydrothermal process and compacted in torus form under different pressures. Two samples A1 and A2 - cobalt doped (0.5 %) were sintered at 1573 K in air atmosphere during 3 h. The magnetic properties were studied by vibrating sample magnetometry, Mössbauer spectroscopy and complex impedanciometry. X-ray diffraction and Hg porosimetry were used in order to determine the average grain size and the type of packing in the samples. Both samples exhibited superparamagnetic behavior in the hysteresis loop. This effect does not agree with Mössbauer results, which were fitted using Normos, a commercial computer program. All samples parameters were compared.
publishDate 1999
dc.date.none.fl_str_mv 1999-07-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14391999000300020
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.2 n.3 1999
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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