Structure and magnetic properties of the porous Al-substituted barium hexaferrites

Guanghui Han; Rui Sui; Yongsheng Yu; Li Wang; Menggang Li; Ji Li; Hu Liu; Weiwei Yang

doi:10.1016/j.jmmm.2021.167824

Structure and magnetic properties of the porous Al-substituted barium hexaferrites

Guanghui Han
, Rui Sui
, Yongsheng Yu^*
, Li Wang
, Menggang Li
, Ji Li
, Hu Liu
, Weiwei Yang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Jilin Normal University

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Ion substitution is considered to be one of the efficient approaches to improve the magnetic properties of the barium hexaferrites. In this work, we fabricated BaFe₁₂₋_xAl_xO₁₉ (x = 0, 1, 2, 4, 6) via a simple auto-combustion method and investigated their structures, morphologies and magnetic properties. The coercivity is greatly affected by annealing temperature and Al³⁺ content. In addition, the Al³⁺ substitution sites in BaFe₁₂₋_xAl_xO₁₉ were further investigated by the Mössbauer spectroscopy and the superparamagnetic components were found in the BaFe₈Al₄O₁₉ and BaFe₆Al₆O₁₉. The highest coercivity of 13.7 kOe was achieved in the BaFe₈Al₄O₁₉, which increases by 168.6% compared with that of BaFe₁₂O₁₉. This work opens up a new and meaningful insight for the understanding of microstructure and coercivity mechanism towards the Al³⁺ substituted barium hexaferrites.

Original language	English
Article number	167824
Journal	Journal of Magnetism and Magnetic Materials
Volume	528
DOIs	https://doi.org/10.1016/j.jmmm.2021.167824
State	Published - 15 Jun 2021
Externally published	Yes

Keywords

Al substitution
Barium hexaferrite
Coercivity
Mössbauer spectroscopy

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10.1016/j.jmmm.2021.167824

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@article{6b5e7c9452554cf0aeb7f25fafc09bc4,

title = "Structure and magnetic properties of the porous Al-substituted barium hexaferrites",

abstract = "Ion substitution is considered to be one of the efficient approaches to improve the magnetic properties of the barium hexaferrites. In this work, we fabricated BaFe12−xAlxO19 (x = 0, 1, 2, 4, 6) via a simple auto-combustion method and investigated their structures, morphologies and magnetic properties. The coercivity is greatly affected by annealing temperature and Al3+ content. In addition, the Al3+ substitution sites in BaFe12−xAlxO19 were further investigated by the M{\"o}ssbauer spectroscopy and the superparamagnetic components were found in the BaFe8Al4O19 and BaFe6Al6O19. The highest coercivity of 13.7 kOe was achieved in the BaFe8Al4O19, which increases by 168.6\% compared with that of BaFe12O19. This work opens up a new and meaningful insight for the understanding of microstructure and coercivity mechanism towards the Al3+ substituted barium hexaferrites.",

keywords = "Al substitution, Barium hexaferrite, Coercivity, M{\"o}ssbauer spectroscopy",

author = "Guanghui Han and Rui Sui and Yongsheng Yu and Li Wang and Menggang Li and Ji Li and Hu Liu and Weiwei Yang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = jun,

day = "15",

doi = "10.1016/j.jmmm.2021.167824",

language = "英语",

volume = "528",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Structure and magnetic properties of the porous Al-substituted barium hexaferrites

AU - Han, Guanghui

AU - Sui, Rui

AU - Yu, Yongsheng

AU - Wang, Li

AU - Li, Menggang

AU - Li, Ji

AU - Liu, Hu

AU - Yang, Weiwei

PY - 2021/6/15

Y1 - 2021/6/15

N2 - Ion substitution is considered to be one of the efficient approaches to improve the magnetic properties of the barium hexaferrites. In this work, we fabricated BaFe12−xAlxO19 (x = 0, 1, 2, 4, 6) via a simple auto-combustion method and investigated their structures, morphologies and magnetic properties. The coercivity is greatly affected by annealing temperature and Al3+ content. In addition, the Al3+ substitution sites in BaFe12−xAlxO19 were further investigated by the Mössbauer spectroscopy and the superparamagnetic components were found in the BaFe8Al4O19 and BaFe6Al6O19. The highest coercivity of 13.7 kOe was achieved in the BaFe8Al4O19, which increases by 168.6% compared with that of BaFe12O19. This work opens up a new and meaningful insight for the understanding of microstructure and coercivity mechanism towards the Al3+ substituted barium hexaferrites.

AB - Ion substitution is considered to be one of the efficient approaches to improve the magnetic properties of the barium hexaferrites. In this work, we fabricated BaFe12−xAlxO19 (x = 0, 1, 2, 4, 6) via a simple auto-combustion method and investigated their structures, morphologies and magnetic properties. The coercivity is greatly affected by annealing temperature and Al3+ content. In addition, the Al3+ substitution sites in BaFe12−xAlxO19 were further investigated by the Mössbauer spectroscopy and the superparamagnetic components were found in the BaFe8Al4O19 and BaFe6Al6O19. The highest coercivity of 13.7 kOe was achieved in the BaFe8Al4O19, which increases by 168.6% compared with that of BaFe12O19. This work opens up a new and meaningful insight for the understanding of microstructure and coercivity mechanism towards the Al3+ substituted barium hexaferrites.

KW - Al substitution

KW - Barium hexaferrite

KW - Coercivity

KW - Mössbauer spectroscopy

UR - https://www.scopus.com/pages/publications/85101593330

U2 - 10.1016/j.jmmm.2021.167824

DO - 10.1016/j.jmmm.2021.167824

M3 - 文章

AN - SCOPUS:85101593330

SN - 0304-8853

VL - 528

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

M1 - 167824

ER -

Structure and magnetic properties of the porous Al-substituted barium hexaferrites

Abstract

Keywords

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