Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19)
We describe the synthesis and characterization of magnetic materials with improved magnetic properties for permanent magnet applications. Sr _1− _x RE _x Al _2 Fe _10 O _19 (RE = La, Ce, Tb, and Dy; x = 0.0 and 0.1) were prepared by ball milling and sintering at 1200 °C for 6 h. The effects of (Al...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab5ddd |
| _version_ | 1797747164303065088 |
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| author | Ghada A Al-Garalleh Sami H Mahmood Ibrahim Bsoul Riza Loloee |
| author_facet | Ghada A Al-Garalleh Sami H Mahmood Ibrahim Bsoul Riza Loloee |
| author_sort | Ghada A Al-Garalleh |
| collection | DOAJ |
| description | We describe the synthesis and characterization of magnetic materials with improved magnetic properties for permanent magnet applications. Sr _1− _x RE _x Al _2 Fe _10 O _19 (RE = La, Ce, Tb, and Dy; x = 0.0 and 0.1) were prepared by ball milling and sintering at 1200 °C for 6 h. The effects of (Al ^3+ –RE ^3+ ) substitution on the structural and magnetic properties of SrM hexaferrites were investigated by x-ray diffraction, scanning electron microscopy, and magnetic measurements at low (5 K), and high temperatures (from room temperature to above Curie temperature). The sample with x = 0, and that with La substitution, consisted of a single SrM phase. The rest of the samples contained traces of secondary oxide phases, and exhibited a small reduction in lattice parameters compared with the unsubstituted SrFe _12 O _19 . The coercivity of the samples (8800 ≤ H _cM ≤ 9750 Oe) was more than double the standard value of the unsubstituted compound, and the Curie temperatures was >300 °C for all samples. Also, the saturation magnetization (32.5–46.4 emu g ^−1 ) was high enough to make the overall magnetic properties of these compounds potentially important for the permanent magnet industry. |
| first_indexed | 2024-03-12T15:48:07Z |
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| id | doaj.art-9d60290630bc4183a2cc940c7ffc8fe4 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:48:07Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
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| series | Materials Research Express |
| spelling | doaj.art-9d60290630bc4183a2cc940c7ffc8fe42023-08-09T15:21:32ZengIOP PublishingMaterials Research Express2053-15912020-01-017202610310.1088/2053-1591/ab5dddStructural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19)Ghada A Al-Garalleh0Sami H Mahmood1https://orcid.org/0000-0002-4945-9109Ibrahim Bsoul2Riza Loloee3Physics Department, The University of Jordan , Amman 11942, JordanPhysics Department, The University of Jordan , Amman 11942, Jordan; Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, United States of AmericaPhysics Department, Al al-Bayt University , Mafraq, JordanDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, United States of AmericaWe describe the synthesis and characterization of magnetic materials with improved magnetic properties for permanent magnet applications. Sr _1− _x RE _x Al _2 Fe _10 O _19 (RE = La, Ce, Tb, and Dy; x = 0.0 and 0.1) were prepared by ball milling and sintering at 1200 °C for 6 h. The effects of (Al ^3+ –RE ^3+ ) substitution on the structural and magnetic properties of SrM hexaferrites were investigated by x-ray diffraction, scanning electron microscopy, and magnetic measurements at low (5 K), and high temperatures (from room temperature to above Curie temperature). The sample with x = 0, and that with La substitution, consisted of a single SrM phase. The rest of the samples contained traces of secondary oxide phases, and exhibited a small reduction in lattice parameters compared with the unsubstituted SrFe _12 O _19 . The coercivity of the samples (8800 ≤ H _cM ≤ 9750 Oe) was more than double the standard value of the unsubstituted compound, and the Curie temperatures was >300 °C for all samples. Also, the saturation magnetization (32.5–46.4 emu g ^−1 ) was high enough to make the overall magnetic properties of these compounds potentially important for the permanent magnet industry.https://doi.org/10.1088/2053-1591/ab5dddhexaferriterare-earth substitutionaluminum substitutionball millingstructural propertiesmagnetic properties |
| spellingShingle | Ghada A Al-Garalleh Sami H Mahmood Ibrahim Bsoul Riza Loloee Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19) Materials Research Express hexaferrite rare-earth substitution aluminum substitution ball milling structural properties magnetic properties |
| title | Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19) |
| title_full | Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19) |
| title_fullStr | Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19) |
| title_full_unstemmed | Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19) |
| title_short | Structural and magnetic properties of RE-Al substituted nanocrystalline hexaferrites (Sr1−xRExAl2Fe10O19) |
| title_sort | structural and magnetic properties of re al substituted nanocrystalline hexaferrites sr1 xrexal2fe10o19 |
| topic | hexaferrite rare-earth substitution aluminum substitution ball milling structural properties magnetic properties |
| url | https://doi.org/10.1088/2053-1591/ab5ddd |
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