Positron Annihilation Studies on Chemically Synthesized FeCo Alloy
Abstract Equiatomic flower-like FeCo magnetic nanoparticles are synthesized through a modified one-pot polyol technique. The as-prepared samples are annealed at 700 and 800 °C under reducing atmosphere. The saturation magnetization and coercivity of the flower-like FeCo are found to be 198 (1) emu/g...
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2018-06-01
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Online Access: | https://doi.org/10.1038/s41598-018-27949-2 |
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doaj-48eeb33da9374c6dae3f0401aa042eb32020-12-08T05:38:32ZengNature Publishing GroupScientific Reports2045-23222018-06-01811910.1038/s41598-018-27949-2Positron Annihilation Studies on Chemically Synthesized FeCo AlloyP. Rajesh0S. Sellaiyan1A. Uedono2T. Arun3R. Justin Joseyphus4Magnetic Materials Laboratory, Department of Physics, National Institute of TechnologyDivision of Applied Physics, University of TsukubaDivision of Applied Physics, University of TsukubaAdvanced Materials Laboratory, Department of Mechanical Engineering, University of ChileMagnetic Materials Laboratory, Department of Physics, National Institute of TechnologyAbstract Equiatomic flower-like FeCo magnetic nanoparticles are synthesized through a modified one-pot polyol technique. The as-prepared samples are annealed at 700 and 800 °C under reducing atmosphere. The saturation magnetization and coercivity of the flower-like FeCo are found to be 198 (1) emu/g and 243 (10) Oe respectively. The magnetic properties of FeCo approach the bulk behavior with annealing. Positron lifetime studies on the chemically synthesized equiatomic FeCo magnetic nanoparticles with flower-like morphology are reported and compared with Fe, Co and FeCo annealed at various temperatures. The FeCo is characterized by different lifetime components corresponding to positron annihilation events in vacancies and various open volume defects due to their unique morphology. The studies suggest defects arising out of cluster vacancies and interpetal gap that reduce on annealing. The average pore size obtained from positron annihilation studies closely matches with the interpetal distance obtained from the electron microscopic analysis for the flower-like FeCo.https://doi.org/10.1038/s41598-018-27949-2 |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
P. Rajesh S. Sellaiyan A. Uedono T. Arun R. Justin Joseyphus |
spellingShingle |
P. Rajesh S. Sellaiyan A. Uedono T. Arun R. Justin Joseyphus Positron Annihilation Studies on Chemically Synthesized FeCo Alloy Scientific Reports |
author_facet |
P. Rajesh S. Sellaiyan A. Uedono T. Arun R. Justin Joseyphus |
author_sort |
P. Rajesh |
title |
Positron Annihilation Studies on Chemically Synthesized FeCo Alloy |
title_short |
Positron Annihilation Studies on Chemically Synthesized FeCo Alloy |
title_full |
Positron Annihilation Studies on Chemically Synthesized FeCo Alloy |
title_fullStr |
Positron Annihilation Studies on Chemically Synthesized FeCo Alloy |
title_full_unstemmed |
Positron Annihilation Studies on Chemically Synthesized FeCo Alloy |
title_sort |
positron annihilation studies on chemically synthesized feco alloy |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2018-06-01 |
description |
Abstract Equiatomic flower-like FeCo magnetic nanoparticles are synthesized through a modified one-pot polyol technique. The as-prepared samples are annealed at 700 and 800 °C under reducing atmosphere. The saturation magnetization and coercivity of the flower-like FeCo are found to be 198 (1) emu/g and 243 (10) Oe respectively. The magnetic properties of FeCo approach the bulk behavior with annealing. Positron lifetime studies on the chemically synthesized equiatomic FeCo magnetic nanoparticles with flower-like morphology are reported and compared with Fe, Co and FeCo annealed at various temperatures. The FeCo is characterized by different lifetime components corresponding to positron annihilation events in vacancies and various open volume defects due to their unique morphology. The studies suggest defects arising out of cluster vacancies and interpetal gap that reduce on annealing. The average pore size obtained from positron annihilation studies closely matches with the interpetal distance obtained from the electron microscopic analysis for the flower-like FeCo. |
url |
https://doi.org/10.1038/s41598-018-27949-2 |
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