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Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response
One-dimensional nanorod arrays exhibiting hierarchical flowerlike morphologies, of Co and Ni based ferrites were synthesized by hydrothermal treatment and using ammonium fluoride (NH(4)F) as a mineralizing agent. The effects of NH(4)F concentration and synthesis temperature were probed to control th...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9064568/ https://www.ncbi.nlm.nih.gov/pubmed/35520564 http://dx.doi.org/10.1039/c9ra03295a |
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author | Abbas, Syed Kumail Atiq, Shahid Saleem, Murtaza Riaz, Saira Naseem, Shahzad Anwar, M. Sabieh |
author_facet | Abbas, Syed Kumail Atiq, Shahid Saleem, Murtaza Riaz, Saira Naseem, Shahzad Anwar, M. Sabieh |
author_sort | Abbas, Syed Kumail |
collection | PubMed |
description | One-dimensional nanorod arrays exhibiting hierarchical flowerlike morphologies, of Co and Ni based ferrites were synthesized by hydrothermal treatment and using ammonium fluoride (NH(4)F) as a mineralizing agent. The effects of NH(4)F concentration and synthesis temperature were probed to control the morphology of these nanorods that were formed as a result of crystal nucleation. It was observed that a higher concentration of NH(4)F leads to several other nucleation sites above these nanorods while controlled concentration of precursors and NH(4)F results in the synthesis of floral patterns. The specific geometries of these nanorods leads to a shape anisotropy effect resulting in increased magnetic coercive fields. To study the effect of magnetic field on the resistance and current density, impedance spectroscopy and I–V–R characteristics, respectively, were performed. Nanorods show enhanced values for resistance with the increase in magnetic field confirming the effect of magnetoresistive coupling while a decrease in current densities with increasing magnetic field highlights the potential of these structures for magnetoresistive applications. |
format | Online Article Text |
id | pubmed-9064568 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90645682022-05-04 Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response Abbas, Syed Kumail Atiq, Shahid Saleem, Murtaza Riaz, Saira Naseem, Shahzad Anwar, M. Sabieh RSC Adv Chemistry One-dimensional nanorod arrays exhibiting hierarchical flowerlike morphologies, of Co and Ni based ferrites were synthesized by hydrothermal treatment and using ammonium fluoride (NH(4)F) as a mineralizing agent. The effects of NH(4)F concentration and synthesis temperature were probed to control the morphology of these nanorods that were formed as a result of crystal nucleation. It was observed that a higher concentration of NH(4)F leads to several other nucleation sites above these nanorods while controlled concentration of precursors and NH(4)F results in the synthesis of floral patterns. The specific geometries of these nanorods leads to a shape anisotropy effect resulting in increased magnetic coercive fields. To study the effect of magnetic field on the resistance and current density, impedance spectroscopy and I–V–R characteristics, respectively, were performed. Nanorods show enhanced values for resistance with the increase in magnetic field confirming the effect of magnetoresistive coupling while a decrease in current densities with increasing magnetic field highlights the potential of these structures for magnetoresistive applications. The Royal Society of Chemistry 2019-06-04 /pmc/articles/PMC9064568/ /pubmed/35520564 http://dx.doi.org/10.1039/c9ra03295a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Abbas, Syed Kumail Atiq, Shahid Saleem, Murtaza Riaz, Saira Naseem, Shahzad Anwar, M. Sabieh Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response |
title | Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response |
title_full | Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response |
title_fullStr | Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response |
title_full_unstemmed | Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response |
title_short | Fluoride ion assisted growth of hierarchical flowerlike nanostructures of Co/Ni ferrites and their magnetoresistive response |
title_sort | fluoride ion assisted growth of hierarchical flowerlike nanostructures of co/ni ferrites and their magnetoresistive response |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9064568/ https://www.ncbi.nlm.nih.gov/pubmed/35520564 http://dx.doi.org/10.1039/c9ra03295a |
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