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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Autores principales:	P. Rajesh, S. Sellaiyan, A. Uedono, T. Arun, R. Justin Joseyphus
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/48eeb33da9374c6dae3f0401aa042eb3
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spelling	oai:doaj.org-article:48eeb33da9374c6dae3f0401aa042eb32021-12-02T11:40:17ZPositron Annihilation Studies on Chemically Synthesized FeCo Alloy10.1038/s41598-018-27949-22045-2322https://doaj.org/article/48eeb33da9374c6dae3f0401aa042eb32018-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-27949-2https://doaj.org/toc/2045-2322Abstract 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.P. RajeshS. SellaiyanA. UedonoT. ArunR. Justin JoseyphusNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q P. Rajesh S. Sellaiyan A. Uedono T. Arun R. Justin Joseyphus Positron Annihilation Studies on Chemically Synthesized FeCo Alloy
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.
format	article
author	P. Rajesh S. Sellaiyan A. Uedono T. Arun R. Justin Joseyphus
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 Portfolio
publishDate	2018
url	https://doaj.org/article/48eeb33da9374c6dae3f0401aa042eb3
work_keys_str_mv	AT prajesh positronannihilationstudiesonchemicallysynthesizedfecoalloy AT ssellaiyan positronannihilationstudiesonchemicallysynthesizedfecoalloy AT auedono positronannihilationstudiesonchemicallysynthesizedfecoalloy AT tarun positronannihilationstudiesonchemicallysynthesizedfecoalloy AT rjustinjoseyphus positronannihilationstudiesonchemicallysynthesizedfecoalloy
_version_	1718395639883104256

Positron Annihilation Studies on Chemically Synthesized FeCo Alloy

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