Affiliation:
1. Huazhong University of Science and Technology
Abstract
The electromagnetic noise suppression characteristics of a series of FeCoBM -Al2O3 amorphous soft magnetic films were reported in the frequency range from 0.5GHz to 6 GHz. Effect of dopants on the reflection coefficient (S11), transmission coefficient (S21) and power loss (PLOSS/PIN) of as-deposited FeCoBM(M=Nb, Zr, Hf, Ta, Mo, Ti)-Al2O3 films were studied. The (Fe40Co40B20)89Mo8–(Al2O3)3 film had the highest power loss with the value of 0.85 at 6GHz. The transmission properties of the FeCoBNi-Al2O3 also studied in the paper. The power loss of the (Fe40Co40B20)68.36Ni28.64–(Al2O3)3 film was more than 0.6 from 3.0-6.0GHz, which had the best electromagnetic noise suppression characteristics. These results show that the presented films possesses potential in noise suppressor applied in electronic devices .
Publisher
Trans Tech Publications, Ltd.
Reference14 articles.
1. S. Ohnuma, N. Kobayashi, T. Masumoto, S. Mitani and H. Fujimori. Magnetostriction and soft magnetic properties of (CoFe)-Al-O granular films with high electrical resistivity. Journal of applied physics, (1999), 85: 4574.
2. J. W. Lee, Y. K. Hong, K. Kim, J. Joo, Y. W. Yoon, et al. RF and Microwave Noise Suppression In a Transmission Line Using Fe-Si-Al/Ni-Zn Magnetic Composite Films. Journal of the Korean Physical Society, 2006, 48: 1534-1538.
3. J. S. Liao, Z. K. Feng, J. Qiu, Y.Q. Tong. High‐frequency permeability of sputtered Fe-Co-B-based soft magnetic thin films. physica status solidi (a), (2008), 205(12): 2943-2947.
4. S. X. Wang, N. X. Sun, M. Yamaguchi, S. Yabukami. Sandwich films: Properties of a new soft magnetic material. Nature, (2000), 407(6801): 150-151.
5. Ki Hyeon Kim, Shigehiro Ohnuma, and Masahiro Yamaguchi. RF Integrated Noise Suppressor Using Soft Magnetic Films. IEEE Trans Magn, (2004), 40(4): 2838.