Abstract
The increasing of saturation magnetic flux density (Bs) in FeNbB type nanocrystalline alloy has been widely studied. The influence of additional element to improve Amorphous Forming Ability (AFA) in precursor was investigated using substrate temperature controlled sputtering method at 523K. The AFA was improved by the addition of P, Si, V, or Mo, was decreased by the addition of Y, Cu, or Ge. Especially, the addition of 1 at% P exhibited a good effect of obtaining 85 at% of maximum Fe content with high stable amorphous precursor. The addition of P or C increased Bs. The Fe85Nb6B8P1 nanocrystalline alloy ribbon showed stable amorphous phase as quenched, exhibited a homogeneous nanocrystalline structure composed of grains with 10 to 20 nm in diameter after nanocrystallization. The ribbon exhibited high Bs of 1.64T and low coercivity of 10 A/m.
Highlights
Magnetic cores of inductive components are required compatibility with compact volume and high supply current corresponds to electronic devices such as mobile phone and tablet computer
We report on the relationship between additional elements and Amorphous Forming Ability (AFA) and the magnetic properties of Fe85Nb6B8P1 nanocrystalline alloy ribbon in this paper
We succeeded in the development of novel composition FeNbBP with high Bs compared with FeNbB type nanocrystalline alloy by substrate temperature controlled thin film method
Summary
Magnetic cores of inductive components are required compatibility with compact volume and high supply current corresponds to electronic devices such as mobile phone and tablet computer. Some nanocrystalline soft magnetic alloys with High Bs and Low Hc are reported such as Fe-Nb-B,1–4 Fe-Si-B-Nb-Cu, and Fe-Si-B-P-Cu.. The precursor of nanocrystalline alloys with the composition of high Fe content show difficulty in maintaining the amorphous phase and tend to form crystals in the precursor alloy. Improvement of Amorphous Forming Ability (AFA) to obtain stable amorphous phase of precursor before nanocrystallization makes possible to include high Fe content in the composition.. Scitation.org/journal/adv sputtered thin film was not able to reproduce the properties of amorphous alloy ribbons due to the higher quenching rate. The optimized composition of FeNbB type alloys with high Bs was found from investigating by a wide range of compositions effectively with this sputtered thin film method. We report on the relationship between additional elements and AFA and the magnetic properties of Fe85Nb6B8P1 nanocrystalline alloy ribbon in this paper
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