A SINGLE MAGNETORESISTIVE STRIP AS A POWER CONVERTOR

Michal Vopálenský

   Magnetoresistive effect can be exploited for the measurement of an active power of harmonic signals. A single stripe of a magnetoresistive material is capable of converting active power to voltage drop on the stripe. The current flowing through the stripe is proportional to the voltage of the measured signal, whereas the signal current produces magnetic field that influen ces the orientation of magnetization and thus the resistivity of the stripe. The convertor requires a biasing DC magnetic field for a proper operation. The range and sensitivity of the measurement can be determined by the shape anisotropy of the stripe. A theoretical description of a configuration of an active power convertor based on a magnetoresistive stripe with uniaxial anisotropy is given in the paper.

Keywords: anisotropic magnetoresistance, thin ferromagnetic films, active power measurement

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