title: An induction method to calculate the complex permeability of soft magnetic films without a reference sample.
abstract: A new analytical method has been proposed by utilizing an electromagnetic induction principle with a short-circuited microstrip line jig and the complex permeability spectra can be calculated without a known reference sample. The new method using the short-circuited microstrip line can exhibit higher sensitivity and a wider frequency band than coplanar waveguide and pick-up coil. Two magnetic thin films having a good in-plane uniaxial anisotropy are measured by using the induction method. The results show typical complex permeability spectra in good agreement with the theoretical analytical results. The measured permeability values are verified by comparing with the initial susceptibility derived from the sweeping field results. The difference of measured permeability values is less than 5%.
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
authors.forename: Jinwu
authors.initials: J
authors.lastname: Wei
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
authors.forename: Qingfang
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
authors.forename: Derang
authors.initials: D
authors.lastname: Cao
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Sun