Articles you may be interested inAnalysis of steplike change of impedance for thin-film giant magnetoimpedance element with inclined stripe magnetic domain based on magnetic energy Secondary peaks on microwave permeability spectra of soft ferromagnetic thin films with in-plane anisotropy J. Appl. Phys. 97, 10F903 (2005); 10.1063/1.1851914 Microwave permeability spectra of ferromagnetic thin films over a wide range of temperatures J. Appl. Phys. 93, 7202 (2003); 10.1063/1.1555902Microwave permeability of ferromagnetic thin films with stripe domain structureWe developed the fully automatic permeameter which is made of driving plates and shielded loop coil available in 1 MHz-3GHz. We clarified the sensitivity of the permeameter and the sensitivity can be explained by an uncertainty of network analyzer. We evaluate the permeability of striped CoNbZr films ͑50, 20, 10 m wide͒. A reasonable relation between permeability spectrum and domain observations can be demonstrated.

We propose a new method to measure the permeability of striped films. The permeability can be obtained by the change in the input impedance of the film. The sensitivity of these measurements are compared with the figure-eight coil method. The sensitivity of the method is estimated over 100 times greater than a conventional figure-eight coil method. The permeability of striped CoNbZr films (100 m wide) can be measured accurately using this permeameter.Index Terms-High sensitivity, input impedance, striped film, thin film permeability.