Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt–B2O3 granular medium

Kim Kong Tham; Ryosuke Kushibiki; Tomonari Kamada; Shintaro Hinata; Shin Saito

doi:10.7567/JJAP.57.09TE01

Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt–B₂O₃ granular medium

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

ENG - Electronic Engineering

Research output: Contribution to journal › Article

Abstract

The magnetic properties and microstructure of Co₈₀Pt₂₀–30 vol % B₂O₃ granular medium deposited on nucleation layers (NLs) with Co₈₀Pt₂₀–30 vol % oxides (oxides: Nb₂O₅, WO₃, Ta₂O₅, SiO₂, TiO₂, Al₂O₃, Cr₂O₃, and ZrO₂) of various thicknesses were investigated. By introducing an NL, a granular medium with columnar growth of small magnetic grains can be obtained. Furthermore, magnetic grains are separated with an oxide grain boundary material from the initial growth region that promotes the decoupling of magnetic grains, which corresponds to an increase in coercivity. The degrees of diameter reduction and decoupling of magnetic grains depend on the NL thickness and the melting point of the oxide utilized in the NL.

Original language	English
Article number	09TE01
Journal	Japanese journal of applied physics
Volume	57
Issue number	9
DOIs	https://doi.org/10.7567/JJAP.57.09TE01
Publication status	Published - 2018 Sep

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Tham, K. K., Kushibiki, R., Kamada, T., Hinata, S., & Saito, S. (2018). Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt–B₂O₃ granular medium. Japanese journal of applied physics, 57(9), [09TE01]. https://doi.org/10.7567/JJAP.57.09TE01

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title = "Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt–B2O3 granular medium",

abstract = "The magnetic properties and microstructure of Co80Pt20–30 vol % B2O3 granular medium deposited on nucleation layers (NLs) with Co80Pt20–30 vol % oxides (oxides: Nb2O5, WO3, Ta2O5, SiO2, TiO2, Al2O3, Cr2O3, and ZrO2) of various thicknesses were investigated. By introducing an NL, a granular medium with columnar growth of small magnetic grains can be obtained. Furthermore, magnetic grains are separated with an oxide grain boundary material from the initial growth region that promotes the decoupling of magnetic grains, which corresponds to an increase in coercivity. The degrees of diameter reduction and decoupling of magnetic grains depend on the NL thickness and the melting point of the oxide utilized in the NL.",

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AU - Tham, Kim Kong

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AU - Hinata, Shintaro

AU - Saito, Shin

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AB - The magnetic properties and microstructure of Co80Pt20–30 vol % B2O3 granular medium deposited on nucleation layers (NLs) with Co80Pt20–30 vol % oxides (oxides: Nb2O5, WO3, Ta2O5, SiO2, TiO2, Al2O3, Cr2O3, and ZrO2) of various thicknesses were investigated. By introducing an NL, a granular medium with columnar growth of small magnetic grains can be obtained. Furthermore, magnetic grains are separated with an oxide grain boundary material from the initial growth region that promotes the decoupling of magnetic grains, which corresponds to an increase in coercivity. The degrees of diameter reduction and decoupling of magnetic grains depend on the NL thickness and the melting point of the oxide utilized in the NL.

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