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High‐frequency permeability of sputtered Fe–Co–B‐based soft magnetic thin films
Author(s) -
Liao Jiansheng,
Feng Zekun,
Qiu Jing,
Tong Yanqun
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200824316
Subject(s) - permeability (electromagnetism) , electrical resistivity and conductivity , materials science , anisotropy , thin film , magnetic field , nuclear magnetic resonance , ferromagnetic resonance , condensed matter physics , chemistry , electrical engineering , optics , nanotechnology , membrane , physics , magnetization , engineering , biochemistry , quantum mechanics
High‐frequency characteristics of a series of soft magnetic Fe–Co–B‐based thin films are investigated in the range of 0.5–5 GHz. It is found that in‐plane anisotropy can be caused by oblique incidence or applying an external field during deposition. The permeability and the resonance frequency are basically consistent with Snoek's law. Ni can improve the magnetic properties greatly except for the decrease of resistivity. In order to reduce the dissipation and increase the resistivity, SiO 2 is added to the film. Excellent high‐frequency permeability of (Fe 40 Co 40 B 20 ) 0.619 Ni 12.642 –(SiO 2 ) 25.416 is obtained: the resonance frequency exceeds 2.2 GHz; the real and the imaginary parts of the permeability at 0.5 GHz are 476 and 92, respectively; the resistivity of the film reaches 682 μΩ cm. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)