NOVEL PARTICULATE MEDIA WITH COERCIVITY UP TO 2150 OE BASED ON NON-ACICULAR GAMMA-FE2O3 MODIFIED WITH CO/MN/ZN

被引：18

作者：

DENG, MC

CHIN, TS

机构：

[1] Department of Materials Science and Engineering, Tsing Hua University, Taiwan, Hsinchu

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1991年 / 30卷 / 7B期

关键词：

PARTICULATE MEDIA; GAMMA-FE2O3; NON-ACICULAR SHAPE; HIGH COERCIVITY; COPRECIPITATION; HIGH DENSITY RECORDING;

D O I：

10.1143/JJAP.30.L1276

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A series of non-acicular particulate media with coercivity of up to 2150 Oe, residual magnetization of up to 50 emu/g and squareness ratio of up to 0.72 has been developed based on gamma-Fe2O3, modified with Mn, Co and Zn. They were prepared by coprecipitation of Fe, Mn, Co, and Zn ions from an aqueous solution, using an organic alkali, such as triethylamine, to adjust the pH, followed by suitable annealings. The fine particle size of around 50 nm, strong magnetocrystalline anisotropy and annealed directional ordering are possible causes of high coercivity. These media are potential candidates for high density recording.

引用

页码：L1276 / L1278

页数：3

共 7 条

[1]

Bickford L R, 1957, P IEEE S5 B, V104, P238

[2]

CHIKAZUMI S, 1964, PHYSICS MAGNETISM, pCH17

[3] CHARACTERISTICS OF COBALT ADSORBED IRON-OXIDE TAPES [J].