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国家自然科学基金(51171086)

作品数:3 被引量:2H指数:1
相关作者:王锐阿谢卡姆津曹江伟魏福林王颖更多>>
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Micromagnetic simulation with three models of FeCo/L1_0 FePt exchange-coupled particles for bit-patterned media被引量:1
2013年
Compositing soft and hard materials is a promising method to decrease the coercivity of L10 FePt, which is considered to be a suitable material for bit-patterned media. This paper reports the simulation of three models of FeCo/L10 FePt exchange-coupled composite particles for bit patterned media by the OOMMF micromagnetic simulation software: the enclosed model, the side-enclosed model, and the top-covered model. All of them have the same volumes of the soft and hard parts but different shapes. Simulation results show that the switching fields for the three models can be reduced to about 10 kOe (1Oe = 79.5775 A/m) and the factor gain can be improved to 1.4 when the interface exchange coefficient has a proper value. Compared to the other models, the enclosed model has a wider range of interface exchange coefficient values, in which a low switching field and high gain can be obtained. The dependence of the switching fields on the angle of the applied field shows that none of the three models are easily affected by the stray field of a magnetic head.
王颖王锐谢海龙白建民魏福林
关键词:MICROMAGNETIC
Composition influence on the microstructures and magnetic properties of FePt thin films
2013年
The Fex Pt 100x (10nm) (x=31-51) thin films are fabricated on Si (100) substrates by using magnetron sputtering. The highly ordered L1 0 FePt phase is obtained after post-annealing at 700℃in Fe 47 Pt 53 thin film. The sample shows good perpendicular anisotropy with a square loop and a linear loop in the out-of-plane and the in-plane direction, respectively. The variations of the magnetic domains are investigated in the films when the content value of Fe changes from 31% to 51%.
刘立旺党红刚盛伟王颖曹江伟白建民魏福林
关键词:磁学性质SI(100)磁控溅射
条形畴结构的FeCoAlON薄膜磁性的研究被引量:1
2013年
用磁控射频溅射法制备了FeCoAlON薄膜,研究了Al-O和N元素的添加对FeCo合金薄膜的软磁性的影响.研究结果表明:随着Al,O,N元素添加量的增加,薄膜微结构从多晶转化到纳米晶再转化到非晶态,薄膜表现为软磁性;在N的含量较高时,薄膜呈现条形畴结构,本文对条形畴结构出现的机理和条件作了详细讨论,并发现具有条形畴结构的薄膜的磁导率频率特性具有多峰共振的特点.
王锐郑富罗飞龙娄元付王颖曹江伟白建民魏福林阿谢卡姆津
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