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针对经过刻蚀的微细矩形磁性体系,将样品的形状及其磁晶易磁化轴的偏转两个因素引入经典的Stoner-Wohlfarth一致转动磁化模型中,发现磁性样品的微细化将使其特征星形线发生膨胀,而样品形状的缺陷及磁晶易磁化轴的偏转都将导致样品非对称特征星形线的产生.这些结果说明在诸如磁性随机存储器等基于微细磁性薄膜的工作中,薄膜形状及其磁晶易磁化轴的角度不容忽略.
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关键词:
- 磁性薄膜 /
- Stoner-Wohlfarth模型 /
- 特征星形线 /
- 各向异性
Based on the micro-rectangle magnetic film system, and the shape and the tilt of crystal easy axis introduced into the Stoner-Wohlfarth model, it was found that the expansion of astroid was caused by the size dwindlement of the sample, while the defects in shape and the tilt of crystal easy axis would both result in the formation of asymmetrical astroid.These results illuminated that, in micron order magnetic film systems such as magnetic random access memory, the shape and the tilt of crystal easy axis are important for determining the switch field of the film.-
Keywords:
- mangetic films /
- Stoner-Wohlfarth model /
- astroid curve /
- anisotropy
[1] Daughton J M 1997 J. Appl. Phys. 81 3758
[2] Parkin S S P et al 1999 J. Appl. Phys. 85 5828
[3] Anguelouch A et al 2000 Appl. Phys. Lett. 76 622
[4] Schrag B D et al 2000 J. Appl. Phys. 87 4682
[5] Yu L et al 1999 J. Appl. Phys. 85 5267
[6] Stoner E C and Wohlfarth E P 1948 Philos. Trans. Roy. Soc. London A 240 599;reprinted in 1991 IEEE Trans. Magn. 27 3475
[7] Andre T 2000 Phys. Rev. B 61 12221
[8] Andre T 1998 J. Magn. Magn. Mater. 182 5
[9] Nakatani Y, Uesaka Y and Hayashi N 1989 Japan. J. Appl. Phys. 28 2485
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[1] Daughton J M 1997 J. Appl. Phys. 81 3758
[2] Parkin S S P et al 1999 J. Appl. Phys. 85 5828
[3] Anguelouch A et al 2000 Appl. Phys. Lett. 76 622
[4] Schrag B D et al 2000 J. Appl. Phys. 87 4682
[5] Yu L et al 1999 J. Appl. Phys. 85 5267
[6] Stoner E C and Wohlfarth E P 1948 Philos. Trans. Roy. Soc. London A 240 599;reprinted in 1991 IEEE Trans. Magn. 27 3475
[7] Andre T 2000 Phys. Rev. B 61 12221
[8] Andre T 1998 J. Magn. Magn. Mater. 182 5
[9] Nakatani Y, Uesaka Y and Hayashi N 1989 Japan. J. Appl. Phys. 28 2485
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