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Chin. Phys. B, 2014, Vol. 23(8): 086201    DOI: 10.1088/1674-1056/23/8/086201
SPECIAL TOPI—International Conference on Nanoscience & Technology, China 2013 Prev   Next  

Microwave ferromagnetic properties of as-deposited Co2FeSi Heusler alloy films prepared by oblique sputtering

Cao Xiao-Qina, Li Shan-Donga b c, Cai Zhi-Yia, Du Hong-Leib, Xue Qianb, Gao Xiao-Yangb, Xie Shi-Mingb
a Department of Physics, Fujian Normal University, Fuzhou 350000, China;
b College of Physics Science, Qingdao University, Qingdao 266071, China;
c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
Abstract  The Co2FeSi films are deposited on Si (100) substrates by an oblique sputtering method at ambient temperature. It is revealed that the microwave ferromagnetic properties of Co2FeSi films are sensitive to sample position and sputtering power. It is exciting that the as-deposited films without any magnetic annealing exhibit high in-plane uniaxial anisotropy fields in a range of 200 Oe-330 Oe (1 Oe=79.5775 A·m-1), and low coercivities in a range of 5 Oe-28 Oe. As a result, high self-biased ferromagnetic resonance frequency up to 4.75 GHz is achieved in as-deposited oblique sputtered films. These results indicate that Co2FeSi Heusler alloy films are promising in practical applications of RF/microwave devices.
Keywords:  microwave ferromagnetic performances      oblique sputtering      ferromagnetic resonance      Heusler alloy  
Received:  04 September 2013      Revised:  19 December 2013      Published:  15 August 2014
PACS:  62.25.Fg (High-frequency properties, responses to resonant or transient (time-dependent) fields)  
  75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)  
  75.30.Gw (Magnetic anisotropy)  
  71.55.Ak (Metals, semimetals, and alloys)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11074040) and the Key Project of Department of Science and Technology of Shangdong Province of China (Grant No. ZR2012FZ006).
Corresponding Authors:  Li Shan-Dong     E-mail:  dylsd007@163.com,lishd@qdu.edu.cn

Cite this article: 

Cao Xiao-Qin, Li Shan-Dong, Cai Zhi-Yi, Du Hong-Lei, Xue Qian, Gao Xiao-Yang, Xie Shi-Ming Microwave ferromagnetic properties of as-deposited Co2FeSi Heusler alloy films prepared by oblique sputtering 2014 Chin. Phys. B 23 086201

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