Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion
A comparative experimental study of the magnetic properties of CoPt3 and CoPt3/Au nanoparticles as well as a detailed study of the structural properties of the samples by X-ray diffraction, Transmission electron microscopy, and vibrating sample magnetometer is presented in this work. In addition, th...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/52142/1/Recording-media-related%20morphology%20and%20magnetic%20properties%20of%20crystalline%20CoPt3%20and%20CoPt3-Au%20core-shell%20nanoparticles%20synthesized%20via%20reverse%20microemulsion.pdf |
| _version_ | 1825930667579408384 |
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| author | Bahmanrokh, Ghazaleh Hashim, Mansor Matori, Khamirul Amin Soltani, Nayereh Vaziri, Parisa Kanagesan, Samikannu Sabbaghizadeh, Rahim Shafie, Mohd Shamsul Ezzad |
| author_facet | Bahmanrokh, Ghazaleh Hashim, Mansor Matori, Khamirul Amin Soltani, Nayereh Vaziri, Parisa Kanagesan, Samikannu Sabbaghizadeh, Rahim Shafie, Mohd Shamsul Ezzad |
| author_sort | Bahmanrokh, Ghazaleh |
| collection | UPM |
| description | A comparative experimental study of the magnetic properties of CoPt3 and CoPt3/Au nanoparticles as well as a detailed study of the structural properties of the samples by X-ray diffraction, Transmission electron microscopy, and vibrating sample magnetometer is presented in this work. In addition, the effect of particle size on the structure and magnetic properties of nanoparticles prepared by microemulsion is studied. The correlation between particle size, crystallinity, and magnetization was studied as well. CoPt nanoparticles have been studied intensively over the last decade because of their increased magnetic anisotropy in the ordered phase that can be interesting for high density magnetic recording. A significant high coercivity for as-prepared CoPt3 and CoPt3-Au nanoparticles was obtained at room temperature and enhanced after annealing. The focused aim of our study is to obtain high coercivity at room temperature that follows the Curie-Weiss law. This indicates an interacting system in which the nanoparticles behave like single domain ferromagnetic materials in the particle size range of 8 to 35 nm. In addition, the interaction increases by cooling the samples to low temperature around 15 K. Temperature dependence 1/M graph was obtained to investigate the behavior of nanoparticles at low temperature and shows the best fit with Curie-Weis mode. |
| first_indexed | 2024-03-06T09:15:02Z |
| format | Article |
| id | upm.eprints-52142 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:15:02Z |
| publishDate | 2014 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | upm.eprints-521422017-05-05T03:01:09Z http://psasir.upm.edu.my/id/eprint/52142/ Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion Bahmanrokh, Ghazaleh Hashim, Mansor Matori, Khamirul Amin Soltani, Nayereh Vaziri, Parisa Kanagesan, Samikannu Sabbaghizadeh, Rahim Shafie, Mohd Shamsul Ezzad A comparative experimental study of the magnetic properties of CoPt3 and CoPt3/Au nanoparticles as well as a detailed study of the structural properties of the samples by X-ray diffraction, Transmission electron microscopy, and vibrating sample magnetometer is presented in this work. In addition, the effect of particle size on the structure and magnetic properties of nanoparticles prepared by microemulsion is studied. The correlation between particle size, crystallinity, and magnetization was studied as well. CoPt nanoparticles have been studied intensively over the last decade because of their increased magnetic anisotropy in the ordered phase that can be interesting for high density magnetic recording. A significant high coercivity for as-prepared CoPt3 and CoPt3-Au nanoparticles was obtained at room temperature and enhanced after annealing. The focused aim of our study is to obtain high coercivity at room temperature that follows the Curie-Weiss law. This indicates an interacting system in which the nanoparticles behave like single domain ferromagnetic materials in the particle size range of 8 to 35 nm. In addition, the interaction increases by cooling the samples to low temperature around 15 K. Temperature dependence 1/M graph was obtained to investigate the behavior of nanoparticles at low temperature and shows the best fit with Curie-Weis mode. AIP Publishing 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/52142/1/Recording-media-related%20morphology%20and%20magnetic%20properties%20of%20crystalline%20CoPt3%20and%20CoPt3-Au%20core-shell%20nanoparticles%20synthesized%20via%20reverse%20microemulsion.pdf Bahmanrokh, Ghazaleh and Hashim, Mansor and Matori, Khamirul Amin and Soltani, Nayereh and Vaziri, Parisa and Kanagesan, Samikannu and Sabbaghizadeh, Rahim and Shafie, Mohd Shamsul Ezzad (2014) Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion. Journal of Applied Physics, 116 (9). art. no. 093907. pp. 1-10. ISSN 0021-8979; ESSN: 1089-7550 http://aip.scitation.org/doi/abs/10.1063/1.4894154 10.1063/1.4894154 |
| spellingShingle | Bahmanrokh, Ghazaleh Hashim, Mansor Matori, Khamirul Amin Soltani, Nayereh Vaziri, Parisa Kanagesan, Samikannu Sabbaghizadeh, Rahim Shafie, Mohd Shamsul Ezzad Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion |
| title | Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion |
| title_full | Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion |
| title_fullStr | Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion |
| title_full_unstemmed | Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion |
| title_short | Recording-media-related morphology and magnetic properties of crystalline CoPt3 and CoPt3-Au core-shell nanoparticles synthesized via reverse microemulsion |
| title_sort | recording media related morphology and magnetic properties of crystalline copt3 and copt3 au core shell nanoparticles synthesized via reverse microemulsion |
| url | http://psasir.upm.edu.my/id/eprint/52142/1/Recording-media-related%20morphology%20and%20magnetic%20properties%20of%20crystalline%20CoPt3%20and%20CoPt3-Au%20core-shell%20nanoparticles%20synthesized%20via%20reverse%20microemulsion.pdf |
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