A comparative study of NiZn ferrites modified by the addition of cobalt
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, Mössba...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
1999-01-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020 |
| _version_ | 1818350028748488704 |
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| author | Pereira S.L. Pfannes H.-D. Mendes Filho A.A. Pinto L.C.B. de Miranda Chíncaro M.A. |
| author_facet | Pereira S.L. Pfannes H.-D. Mendes Filho A.A. Pinto L.C.B. de Miranda Chíncaro M.A. |
| author_sort | Pereira S.L. |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-13T18:15:20Z |
| format | Article |
| id | doaj.art-0320b5fc8ddc45ce9421c4623a0c2ef4 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-13T18:15:20Z |
| publishDate | 1999-01-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-0320b5fc8ddc45ce9421c4623a0c2ef42022-12-21T23:35:51ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14391999-01-0123231234A comparative study of NiZn ferrites modified by the addition of cobaltPereira S.L.Pfannes H.-D.Mendes Filho A.A.Pinto L.C.B. de MirandaChíncaro M.A.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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020NiZn ferrites |
| spellingShingle | Pereira S.L. Pfannes H.-D. Mendes Filho A.A. Pinto L.C.B. de Miranda Chíncaro M.A. A comparative study of NiZn ferrites modified by the addition of cobalt Materials Research NiZn ferrites |
| title | 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_short | A comparative study of NiZn ferrites modified by the addition of cobalt |
| title_sort | comparative study of nizn ferrites modified by the addition of cobalt |
| topic | NiZn ferrites |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000300020 |
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