A comparative study of NiZn ferrites modified by the addition of cobalt
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , , , |
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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Materials research (São Carlos. Online) |
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|
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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 |
status_str |
publishedVersion |
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 |
_version_ |
1754212656567287808 |