Title :
Dynamic calculation of the responsivity of monodomain fluxgate magnetometers
Author :
Deak, J.G. ; Koch, R.H. ; Guthmiller, G.E. ; Fontana, R.E., Jr.
Author_Institution :
IBM Storage Syst. Div., San Jose, CA, USA
fDate :
7/1/2000 12:00:00 AM
Abstract :
A model is presented describing the dynamic response of a single-domain fluxgate magnetometer over a wide range of operating conditions in terms of a single measurement of a hysteresis loop or the permeability of the fluxgate´s ferromagnetic core. The model is based on the Landau-Lifshitz-Gilbert equation, which describes the dynamics of a coherently rotating ferromagnet. Measurements of the response of a permalloy thin-film fluxgate and a molybdenum-permalloy tube fluxgate demonstrate the accuracy and limitations of the model
Keywords :
fluxgate magnetometers; Landau-Lifshitz-Gilbert equation; MoNiFe; NiFe; coherent rotation; dynamic model; ferromagnetic core; hysteresis loop; molybdenum-permalloy tube fluxgate; monodomain fluxgate magnetometer; permalloy thin-film fluxgate; permeability; responsivity; Coils; Equations; Magnetic cores; Magnetic field measurement; Magnetic flux; Magnetic materials; Magnetic noise; Magnetic sensors; Magnetometers; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
