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Properties of magnetically semi-hard (FexCo1−x)3B compounds

Pal, S. K. and Skokov, K. P. and Groeb, T. and Ener, S. and Gutfleisch, O. (2017):
Properties of magnetically semi-hard (FexCo1−x)3B compounds.
In: Journal of Alloys and Compounds, Elsevier, pp. 543-547, 696, ISSN 09258388,
[Online-Edition: http://doi.org/10.1016/j.jallcom.2016.11.226],
[Article]

Abstract

The (FexCo1−x)3B (x = 0.0, 0.1, 0.2, 0.3) compounds have been prepared by induction melting with subsequent annealing. All of the compounds form in the orthorhombic Fe3C-type structure and exhibit ferromagnetic behaviour: the Curie temperature increases from 750 K for x = 0.0 to 923 K for x = 0.3. Magnetic domain images obtained by Kerr microscopy reveal the presence of uniaxial magnetocrystalline anisotropy. The magnetocrystalline anisotropy energy and anisotropy field of magnetically oriented fine particles have been determined. An anisotropy energy of 651 kJm−3 was obtained for Co3B (x = 0.0), the anisotropy energy was found to decrease with increasing Fe content reaching a value of 507 kJm−3 for x = 0.3. These compounds with uniaxial magnetocrystalline anisotropy are potential candidates to be used as semi-hard magnetic phase for the preparation of rare-earth free nanocomposite permanent magnets.

Item Type: Article
Erschienen: 2017
Creators: Pal, S. K. and Skokov, K. P. and Groeb, T. and Ener, S. and Gutfleisch, O.
Title: Properties of magnetically semi-hard (FexCo1−x)3B compounds
Language: English
Abstract:

The (FexCo1−x)3B (x = 0.0, 0.1, 0.2, 0.3) compounds have been prepared by induction melting with subsequent annealing. All of the compounds form in the orthorhombic Fe3C-type structure and exhibit ferromagnetic behaviour: the Curie temperature increases from 750 K for x = 0.0 to 923 K for x = 0.3. Magnetic domain images obtained by Kerr microscopy reveal the presence of uniaxial magnetocrystalline anisotropy. The magnetocrystalline anisotropy energy and anisotropy field of magnetically oriented fine particles have been determined. An anisotropy energy of 651 kJm−3 was obtained for Co3B (x = 0.0), the anisotropy energy was found to decrease with increasing Fe content reaching a value of 507 kJm−3 for x = 0.3. These compounds with uniaxial magnetocrystalline anisotropy are potential candidates to be used as semi-hard magnetic phase for the preparation of rare-earth free nanocomposite permanent magnets.

Journal or Publication Title: Journal of Alloys and Compounds
Volume: 696
Publisher: Elsevier
Uncontrolled Keywords: Rare-earth free permanent magnets, Semi-hard magnets, Magnetocrystalline anisotropy, Anisotropy field, FeCoB, Co3B
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Functional Materials
Date Deposited: 17 Mar 2017 09:06
Official URL: http://doi.org/10.1016/j.jallcom.2016.11.226
Identification Number: doi:10.1016/j.jallcom.2016.11.226
Funders: Financial support by the German federal state of Hessen through its excellence program LOEWE “RESPONSE” is gratefully acknowledged.
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