期刊论文详细信息
Biosensors
Magnetic Properties of FeNi-Based Thin Film Materials with Different Additives
Cai Liang1  Chinthaka P. Gooneratne1  Qing Xiao Wang2  Yang Liu2  Yogesh Gianchandani3 
[1] Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology, 4700 Kaust, Thuwal 23955, Saudi Arabia; E-Mails:;Core Laboratory and Major Facilities, King Abdullah University of Science and Technology, 4700 Kaust, Thuwal 23955, Saudi Arabia; E-Mails:;Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA; E-Mail:
关键词: magnetic sensor;    magnetoelastic;    magnetostriction;    longitudinal vibration;    magnetic thin films;    magnetic materials;   
DOI  :  10.3390/bios4030189
来源: mdpi
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【 摘 要 】

This paper presents a study of FeNi-based thin film materials deposited with Mo, Al and B using a co-sputtering process. The existence of soft magnetic properties in combination with strong magneto-mechanical coupling makes these materials attractive for sensor applications. Our findings show that FeNi deposited with Mo or Al yields magnetically soft materials and that depositing with B further increases the softness. The out-of-plane magnetic anisotropy of FeNi thin films is reduced by depositing with Al and completely removed by depositing with B. The effect of depositing with Mo is dependent on the Mo concentration. The coercivity of FeNiMo and FeNiAl is reduced to less than a half of that of FeNi, and a value as low as 40 A/m is obtained for FeNiB. The surfaces of the obtained FeNiMo, FeNiAl and FeNiB thin films reveal very different morphologies. The surface of FeNiMo shows nano-cracks, while the FeNiAl films show large clusters and fewer nano-cracks. When FeNi is deposited with B, a very smooth morphology is obtained. The crystal structure of FeNiMo strongly depends on the depositant concentration and changes into an amorphous structure at a higher Mo level. FeNiAl thin films remain polycrystalline, even at a very high concentration of Al, and FeNiB films are amorphous, even at a very low concentration of B.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.

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