Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
An investigation was made into the synthesis and magnetic properties of Sm(3-x)Ho xFe5O12 (samarium-holmium-iron) garnet ferrite, as yet absent from the literature. The material in question was synthesized by co-precipitation, starting from hydrated chlorides of rare-earth elements and ferrous sulfa...
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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)
2003-01-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400025 |
| _version_ | 1818482145587363840 |
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| author | Caffarena Valeska da Rocha Ogasawara Tsuneharu |
| author_facet | Caffarena Valeska da Rocha Ogasawara Tsuneharu |
| author_sort | Caffarena Valeska da Rocha |
| collection | DOAJ |
| description | An investigation was made into the synthesis and magnetic properties of Sm(3-x)Ho xFe5O12 (samarium-holmium-iron) garnet ferrite, as yet absent from the literature. The material in question was synthesized by co-precipitation, starting from hydrated chlorides of rare-earth elements and ferrous sulfate, and the mixed hydroxide co-precipitate was calcined at 1000 °C. Using PVA as a binder, rectangular cross section-shaped compacts were produced by means of steel-die pressing, drying and sintering from 1200 to 1450 °C. The main conclusions of this study were that the coercive force decreases as the sintering temperature increases, and that the effect of substituting holmium for samarium in SmIG is entirely different from that provided by replacing yttrium by gadolinium in YIG, which is the most important result of this work. An in-depth investigation will be necessary to determine the correlation between microstructure/magnetic properties and ceramic processing variables. |
| first_indexed | 2024-12-10T11:44:19Z |
| format | Article |
| id | doaj.art-35eb5f796e5b444a93eee5490e08a96b |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-10T11:44:19Z |
| publishDate | 2003-01-01 |
| 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-35eb5f796e5b444a93eee5490e08a96b2022-12-22T01:50:08ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392003-01-0164569576Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitationCaffarena Valeska da RochaOgasawara TsuneharuAn investigation was made into the synthesis and magnetic properties of Sm(3-x)Ho xFe5O12 (samarium-holmium-iron) garnet ferrite, as yet absent from the literature. The material in question was synthesized by co-precipitation, starting from hydrated chlorides of rare-earth elements and ferrous sulfate, and the mixed hydroxide co-precipitate was calcined at 1000 °C. Using PVA as a binder, rectangular cross section-shaped compacts were produced by means of steel-die pressing, drying and sintering from 1200 to 1450 °C. The main conclusions of this study were that the coercive force decreases as the sintering temperature increases, and that the effect of substituting holmium for samarium in SmIG is entirely different from that provided by replacing yttrium by gadolinium in YIG, which is the most important result of this work. An in-depth investigation will be necessary to determine the correlation between microstructure/magnetic properties and ceramic processing variables.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400025ceramicschemical synthesiselectron microscopymagnetic propertiesgarnet ferrite |
| spellingShingle | Caffarena Valeska da Rocha Ogasawara Tsuneharu Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation Materials Research ceramics chemical synthesis electron microscopy magnetic properties garnet ferrite |
| title | Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation |
| title_full | Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation |
| title_fullStr | Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation |
| title_full_unstemmed | Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation |
| title_short | Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation |
| title_sort | microstructure and hysteresis curves of samarium holmium iron garnet synthesized by coprecipitation |
| topic | ceramics chemical synthesis electron microscopy magnetic properties garnet ferrite |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400025 |
| work_keys_str_mv | AT caffarenavaleskadarocha microstructureandhysteresiscurvesofsamariumholmiumirongarnetsynthesizedbycoprecipitation AT ogasawaratsuneharu microstructureandhysteresiscurvesofsamariumholmiumirongarnetsynthesizedbycoprecipitation |