Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles
Magnesium ferrite, MgFe2O4, (MgFO) nanoparticles (NPs) have been synthesized through sol-gel process. Subsequently, as prepared particles were coated with Zinc-oxide (ZnO) layer(s) through ultrasonication process. Thermal stability, structure and magnetic properties of as-prepared (AP) and annealed...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2017-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4975355 |
| _version_ | 1819023352246829056 |
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| author | S. Mallesh D. Prabu V. Srinivas |
| author_facet | S. Mallesh D. Prabu V. Srinivas |
| author_sort | S. Mallesh |
| collection | DOAJ |
| description | Magnesium ferrite, MgFe2O4, (MgFO) nanoparticles (NPs) have been synthesized through sol-gel process. Subsequently, as prepared particles were coated with Zinc-oxide (ZnO) layer(s) through ultrasonication process. Thermal stability, structure and magnetic properties of as-prepared (AP) and annealed samples in the temperature range of 350 °C-1200 °C have been investigated. Structural data suggests that AP MgFO NPs and samples annealed below 500 °C in air exhibit stable ferrite phase. However, α-Fe2O3 and a small fraction of MgO secondary phases appear along with ferrite phase on annealing in the temperatures range 500 °C- 1000 °C. This results in significant changes in magnetic moment for AP NPs 0.77 μB increases to 0.92 μB for 1200 °C air annealed sample. The magnetic properties decreased at intermediate temperatures due to the presence of secondary phases. On the other hand, pure ferrite phase could be stabilized with an optimum amount of ZnO coated MgFO NPs for samples annealed in the temperature range 500 °C-1000 °C with improvement in magnetic behavior compared to that of MgFO samples. |
| first_indexed | 2024-12-21T04:37:31Z |
| format | Article |
| id | doaj.art-cfe2b707336943d6aa2a7406636d2061 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T04:37:31Z |
| publishDate | 2017-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-cfe2b707336943d6aa2a7406636d20612022-12-21T19:15:49ZengAIP Publishing LLCAIP Advances2158-32262017-05-0175056103056103-710.1063/1.4975355181791ADVThermal stability and magnetic properties of MgFe2O4@ZnO nanoparticlesS. Mallesh0D. Prabu1V. Srinivas2Department of Physics, Indian Institute of Technology Madras, Chennai 600036, IndiaCentre for Automotive Energy Materials, International Advanced Research Centre for Powder Metallurgy and New Materials, Chennai 600113, IndiaDepartment of Physics, Indian Institute of Technology Madras, Chennai 600036, IndiaMagnesium ferrite, MgFe2O4, (MgFO) nanoparticles (NPs) have been synthesized through sol-gel process. Subsequently, as prepared particles were coated with Zinc-oxide (ZnO) layer(s) through ultrasonication process. Thermal stability, structure and magnetic properties of as-prepared (AP) and annealed samples in the temperature range of 350 °C-1200 °C have been investigated. Structural data suggests that AP MgFO NPs and samples annealed below 500 °C in air exhibit stable ferrite phase. However, α-Fe2O3 and a small fraction of MgO secondary phases appear along with ferrite phase on annealing in the temperatures range 500 °C- 1000 °C. This results in significant changes in magnetic moment for AP NPs 0.77 μB increases to 0.92 μB for 1200 °C air annealed sample. The magnetic properties decreased at intermediate temperatures due to the presence of secondary phases. On the other hand, pure ferrite phase could be stabilized with an optimum amount of ZnO coated MgFO NPs for samples annealed in the temperature range 500 °C-1000 °C with improvement in magnetic behavior compared to that of MgFO samples.http://dx.doi.org/10.1063/1.4975355 |
| spellingShingle | S. Mallesh D. Prabu V. Srinivas Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles AIP Advances |
| title | Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles |
| title_full | Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles |
| title_fullStr | Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles |
| title_full_unstemmed | Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles |
| title_short | Thermal stability and magnetic properties of MgFe2O4@ZnO nanoparticles |
| title_sort | thermal stability and magnetic properties of mgfe2o4 zno nanoparticles |
| url | http://dx.doi.org/10.1063/1.4975355 |
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