Limitations of an amorphoushyphen;metal magnetometer operated by modulating the magnetostrictive strain

摘要

An analysis is presented of the characteristics of a magnetometer which uses an amorphoushyphen;metal ribbon as its primary sensing element and which operates by modulating the magnetostrictive strain. Magnetic fields at the second harmonic of the modulation frequency are identified as capable of significantly degrading the magnetometer performance. A secondhyphen;harmonic field is measured and its contribution to the noise is estimated.