High coercivity SmCo5 synthesized with assistance of colloidal SiO2

Abstract SmCo5 is one of the most promising candidates for achieving a hard magnet with a high coercivity. Usually, composition, morphology, and size determine the coercivity of a magnet, however, it is challenging to synthesize phase pure SmCo5 with optimal size and high coercivity. In this paper,...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Hao Tang, Mohammad Aref Hasen Mamakhel, Mogens Christensen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d663a4bc24ea4e0090f20ca343a7f233
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:d663a4bc24ea4e0090f20ca343a7f233
record_format	dspace
spelling	oai:doaj.org-article:d663a4bc24ea4e0090f20ca343a7f2332021-12-02T15:54:05ZHigh coercivity SmCo5 synthesized with assistance of colloidal SiO210.1038/s41598-021-83826-52045-2322https://doaj.org/article/d663a4bc24ea4e0090f20ca343a7f2332021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83826-5https://doaj.org/toc/2045-2322Abstract SmCo5 is one of the most promising candidates for achieving a hard magnet with a high coercivity. Usually, composition, morphology, and size determine the coercivity of a magnet, however, it is challenging to synthesize phase pure SmCo5 with optimal size and high coercivity. In this paper, we report on the successful synthesis of phase pure SmCo5 with spherical/prolate spheroids shape. Size control is obtained by utilizing colloidal SiO2 as a template preventing aggregation and growth of the precursor. The amount of SiO2 nanoparticles (NPs) in the precursor tunes the average particle size (APS) of the synthesized SmCo5 with particle dimension from 740 to 504 nm. As-prepared pure SmCo5 fine powder obtained from using 2 ml SiO2 suspension possesses an APS of 625 nm and exhibits an excellent coercivity of 2986 kA m−1 (37.5 kOe) without alignment of the particles prior to magnetisation measurements. Comparing with a reference sample prepared without adding any SiO2 NPs, an enhancement of 35% of the coercivity was achieved. The improvement is due to phase purity, stable single-domain (SSD) size, and shape anisotropy originating from the prolate spheroid particles.Hao TangMohammad Aref Hasen MamakhelMogens ChristensenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hao Tang Mohammad Aref Hasen Mamakhel Mogens Christensen High coercivity SmCo5 synthesized with assistance of colloidal SiO2
description	Abstract SmCo5 is one of the most promising candidates for achieving a hard magnet with a high coercivity. Usually, composition, morphology, and size determine the coercivity of a magnet, however, it is challenging to synthesize phase pure SmCo5 with optimal size and high coercivity. In this paper, we report on the successful synthesis of phase pure SmCo5 with spherical/prolate spheroids shape. Size control is obtained by utilizing colloidal SiO2 as a template preventing aggregation and growth of the precursor. The amount of SiO2 nanoparticles (NPs) in the precursor tunes the average particle size (APS) of the synthesized SmCo5 with particle dimension from 740 to 504 nm. As-prepared pure SmCo5 fine powder obtained from using 2 ml SiO2 suspension possesses an APS of 625 nm and exhibits an excellent coercivity of 2986 kA m−1 (37.5 kOe) without alignment of the particles prior to magnetisation measurements. Comparing with a reference sample prepared without adding any SiO2 NPs, an enhancement of 35% of the coercivity was achieved. The improvement is due to phase purity, stable single-domain (SSD) size, and shape anisotropy originating from the prolate spheroid particles.
format	article
author	Hao Tang Mohammad Aref Hasen Mamakhel Mogens Christensen
author_facet	Hao Tang Mohammad Aref Hasen Mamakhel Mogens Christensen
author_sort	Hao Tang
title	High coercivity SmCo5 synthesized with assistance of colloidal SiO2
title_short	High coercivity SmCo5 synthesized with assistance of colloidal SiO2
title_full	High coercivity SmCo5 synthesized with assistance of colloidal SiO2
title_fullStr	High coercivity SmCo5 synthesized with assistance of colloidal SiO2
title_full_unstemmed	High coercivity SmCo5 synthesized with assistance of colloidal SiO2
title_sort	high coercivity smco5 synthesized with assistance of colloidal sio2
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d663a4bc24ea4e0090f20ca343a7f233
work_keys_str_mv	AT haotang highcoercivitysmco5synthesizedwithassistanceofcolloidalsio2 AT mohammadarefhasenmamakhel highcoercivitysmco5synthesizedwithassistanceofcolloidalsio2 AT mogenschristensen highcoercivitysmco5synthesizedwithassistanceofcolloidalsio2
_version_	1718385478455001088

High coercivity SmCo5 synthesized with assistance of colloidal SiO2

Ejemplares similares