TY - JOUR
T1 - Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt–B2O3 granular medium
AU - Tham, Kim Kong
AU - Kushibiki, Ryosuke
AU - Kamada, Tomonari
AU - Hinata, Shintaro
AU - Saito, Shin
PY - 2018/9
Y1 - 2018/9
N2 - 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.
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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U2 - 10.7567/JJAP.57.09TE01
DO - 10.7567/JJAP.57.09TE01
M3 - Article
AN - SCOPUS:85053319395
VL - 57
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9
M1 - 09TE01
ER -