Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties

High-throughput synthesis of Samarium-Cobalt sub-micron fibers with controlled composition and dimension was demonstrated by combining electrospinning and reduction-diffusion processes. The composition of fibers was readily varied (8 < Sm < 20 at.%) by adjusting precursor composition w...

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Main Authors: Jimin Lee, Tae-Yeon Hwang, Min Kyu Kang, Hong-Baek Cho, Jongryoul Kim, Nosang V. Myung, Yong-Ho Choa
Format: Article
Language:English
Published: Frontiers Media S.A. 2018-02-01
Series:Frontiers in Chemistry
Subjects:
samarium cobalt
electrospinning
fiber
permanent magnet
magnetic properties
Online Access:http://journal.frontiersin.org/article/10.3389/fchem.2018.00018/full
id doaj-b44ef9c6afad4c31a78850c3a51c9fb4
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spelling doaj-b44ef9c6afad4c31a78850c3a51c9fb42020-11-24T23:51:15ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462018-02-01610.3389/fchem.2018.00018322535Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic PropertiesJimin Lee0Tae-Yeon Hwang1Min Kyu Kang2Hong-Baek Cho3Jongryoul Kim4Nosang V. Myung5Yong-Ho Choa6Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaDepartment of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA, United StatesDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaHigh-throughput synthesis of Samarium-Cobalt sub-micron fibers with controlled composition and dimension was demonstrated by combining electrospinning and reduction-diffusion processes. The composition of fibers was readily varied (8 < Sm < 20 at.%) by adjusting precursor composition whereas the diameter of fibers was precisely controlled by varying electrospinning parameters (e.g., applied voltage, solution feed rate, temperature, and humidity) to reach single-domain size. X-ray diffraction patterns confirmed that single phase Sm2Co17 fibers were synthesized when the metal precursor ratio (Sm3+/(Sm3++Co2+)) was precisely controlled at 10.6%, whereas mixed phases (i.e., Co-Sm2Co17 or Sm2Co17-Sm2Co7) were observed when the ratio is deviated from the stoichiometric. Magnetic saturation (Ms) of the synthesized fibers monotonically decreased with an increased in Sm content. In contrast, coercivity (Hci) monotonically increased with an increase in Sm content.http://journal.frontiersin.org/article/10.3389/fchem.2018.00018/fullsamarium cobaltelectrospinningfiberpermanent magnetmagnetic properties
collection DOAJ
language English
format Article
sources DOAJ
author Jimin Lee
Tae-Yeon Hwang
Min Kyu Kang
Hong-Baek Cho
Jongryoul Kim
Nosang V. Myung
Yong-Ho Choa
spellingShingle Jimin Lee
Tae-Yeon Hwang
Min Kyu Kang
Hong-Baek Cho
Jongryoul Kim
Nosang V. Myung
Yong-Ho Choa
Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties
Frontiers in Chemistry
samarium cobalt
electrospinning
fiber
permanent magnet
magnetic properties
author_facet Jimin Lee
Tae-Yeon Hwang
Min Kyu Kang
Hong-Baek Cho
Jongryoul Kim
Nosang V. Myung
Yong-Ho Choa
author_sort Jimin Lee
title Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties
title_short Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties
title_full Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties
title_fullStr Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties
title_full_unstemmed Synthesis of Samarium-Cobalt Sub-micron Fibers and Their Excellent Hard Magnetic Properties
title_sort synthesis of samarium-cobalt sub-micron fibers and their excellent hard magnetic properties
publisher Frontiers Media S.A.
series Frontiers in Chemistry
issn 2296-2646
publishDate 2018-02-01
description High-throughput synthesis of Samarium-Cobalt sub-micron fibers with controlled composition and dimension was demonstrated by combining electrospinning and reduction-diffusion processes. The composition of fibers was readily varied (8 < Sm < 20 at.%) by adjusting precursor composition whereas the diameter of fibers was precisely controlled by varying electrospinning parameters (e.g., applied voltage, solution feed rate, temperature, and humidity) to reach single-domain size. X-ray diffraction patterns confirmed that single phase Sm2Co17 fibers were synthesized when the metal precursor ratio (Sm3+/(Sm3++Co2+)) was precisely controlled at 10.6%, whereas mixed phases (i.e., Co-Sm2Co17 or Sm2Co17-Sm2Co7) were observed when the ratio is deviated from the stoichiometric. Magnetic saturation (Ms) of the synthesized fibers monotonically decreased with an increased in Sm content. In contrast, coercivity (Hci) monotonically increased with an increase in Sm content.
topic samarium cobalt
electrospinning
fiber
permanent magnet
magnetic properties
url http://journal.frontiersin.org/article/10.3389/fchem.2018.00018/full
work_keys_str_mv AT jiminlee synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
AT taeyeonhwang synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
AT minkyukang synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
AT hongbaekcho synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
AT jongryoulkim synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
AT nosangvmyung synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
AT yonghochoa synthesisofsamariumcobaltsubmicronfibersandtheirexcellenthardmagneticproperties
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