日本応用磁気学会誌
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
メディア III + 信号処理
原子層積層法による高密度磁気記録媒体用C軸配向Baフェライト薄膜の作製
清水 英彦篠崎 秀明星 陽ー加藤 景三金子 双男井川 博行
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ジャーナル オープンアクセス

1997 年 21 巻 S_1_PMRS_96 号 p. S1_70-73

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  In this study, c-axis oriented Ba-ferrite (BaM:BaFe12O19) films about thick 115 nm thick were deposited using an alternate atomic layer deposition method. R layer (BaO·3Fe2O3 layer) thicknesses from 4.6 to 5.9 Å and S layer (spinel: Fe3O4 layer) thicknesses from 4.6 to 5.4 Å deposited 100 times alternately by sputtering at a substrate temperature between 580 °C and 655 °C in an atmosphere of 90%Ar and 10%O2. Before the BaM films were deposited, a ZnO underlayer 15 nm thick was deposited on the thermally oxidized silicon wafer substrate. A strict control of the thickness of R layer and S layer was necessary to obtain a single hexagonal BaM phase. A single-phase BaM film obtained by alternate deposition of 6.9 Å R layers and 4.6 Å S layers at 630 °C had excellent c-axis orientation ( Δθ50 = 2.4° ). Typical magnetic properties of the film were as follows: saturation magnetization Ms=200 emu/cc, perpendicular coercivity Hc = 3.1 kOe and in-plane coercivity Hc//=0.17 kOe.

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© 1997 (社)日本応用磁気学会
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