299 research outputs found
Magnetic and Transport Properties of NiFe/SiO_{2}/NiFe Trilayers
Magnetic coupling between Ni_{81}Fe_{19} double thin films separated by an
insulating SiO_{2} spacer layer is investigated with structural measurements,
cross sectional imaging, magnetization measurements (BH loop) and transport
under the conditions of variable spacer thickness ranging from 0 to 5000
Angstroms. We investigate several models to explain the coercivity variation
with spacer thickness as well as the transport measurements.Comment: Digest accepted in INTERMAG Europe 2002 (Amsterdam). Full paper
submitted to IEEE Trans. Magnetic
A Novel Broadband Measurement Method for the Magnetoimpedance of Ribbons and Thin Films
A novel broad-band measurement method of the MI in thin films and ribbons is
presented. It is based on the automated measurement of the reflection
coefficient of a cell loaded with the sample. Illustrative results obtained
with a permalloy multilayer thin film are presented and discussed.Comment: Paper submitted to International Conference on Magnetism (Rome 2003
Metal-to-glass ratio and the Magneto-Impedance of glass-covered CoFeBSi microwires at high frequencies
High frequency [1-500 MHz] measurements of the Magneto-Impedance (MI) of
glass-covered CoFeBSi microwires are carried
out with various metal-to-wire diameter ratios. A twin-peak, anhysteretic
behaviour is observed as a function of magnetic field. A maximum in appears at different values of the frequency , 125, 140 and 85 MHz with
the corresponding diameter ratio = 0.80, 0.55 and 0.32. We describe the
measurement technique and interpret our results with a thermodynamic model that
leads to a clearer view of the effects of on the maximum value of MI and
the anisotropy field.Comment: 5 pages and 6 figure
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