Hydrogenation caused reversible structural changes in FeCrB type metallic glasses monitored by magnetization parameters

The reversible structural changes caused by alloying with hydrogen help us to understand the relation between amorphous structure and magnetic properties. One binary FeB and three FeCrB type metallic glasses were selected for this study. The significant increase in coercivity after sample hydrogenat...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-02, Vol.735, p.1591-1595
Main Authors: Kováč, J., Novák, L., Kecer, J.
Format: Article
Language:English
Subjects:
Amorphous materials
Anisotropy
Coercivity
Dehydrogenation
Dimensional changes
Glass
Hydrogen
Hydrogen storage
Hydrogenation
Magnetic measurements
Magnetic properties
Magnetostriction
Metallic glasses
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Summary:The reversible structural changes caused by alloying with hydrogen help us to understand the relation between amorphous structure and magnetic properties. One binary FeB and three FeCrB type metallic glasses were selected for this study. The significant increase in coercivity after sample hydrogenation and its subsequent decrease during dehydrogenation are explained by changes in magnetostrictive anisotropy. Applying the Kondorsky model, the dimensional changes in stress centers caused by hydrogenation and dehydrogenation processes were determined from experimentally determined coercivity and effective anisotropy. •Hydrogenation and dehydrogenation processes in amorphous ferromagnets.•Hydrogenation leads to the increase in the coercivity.•Hydrogenation leads to the reduction of domain wall thickness.•a gradual relaxation of hydrogen induced stresses due to hydrogen release.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.11.314