Novel torque magnetometry for uniaxial anisotropy constants of thin films and its application to FePt granular thin films

被引：17

作者：

Ono, Takuya ^{[1
,2
]}

Kikuchi, Nobuaki ^{[3
,4
]}

Okamoto, Satoshi ^{[3
,4
]}

Kitakami, Osamu ^{[3
,4
]}

Shimatsu, Takehito ^{[2
,4
,5
]}

机构：

[1] Fuji Elect Co Ltd, Hino, Tokyo 1918502, Japan

[2] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci FRIS, Sendai, Miyagi 9808578, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan

[5] Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan

来源：

APPLIED PHYSICS EXPRESS | 2018年 / 11卷 / 03期

关键词：

MAGNETIC-ANISOTROPY; ELECTRODES;

D O I：

10.7567/APEX.11.033002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A technique based on torque magnetometry is proposed for precise determination of the uniaxial magnetic anisotropy constant, K-u, of perpendicularly magnetized thin films, in particular for K-u larger than 10(6) J/m(3), by electrical detection of the anomalous Hall effect and exact determination of the magnetic field direction. This technique can measure the K-u value of several-nanometer-thick polycrystalline films. Further, the K-u value of FePt-C granular films, which are expected to be useful for high-density magnetic recording media, is evaluated. The intrinsic K-u value of 4-nm-thick FePt-C thin films fabricated at 450 degrees C is approximately 3 MJ/m(3) for carbon contents up to 34 vol% C. (C) 2018 The Japan Society of Applied Physics

引用

页数：3

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