Title :
Noise Performance of Magnetometers With Resonant Thin-Film Magnetoelectric Sensors
Author :
Jahns, Robert ; Greve, Henry ; Woltermann, Eric ; Quandt, Eckhard ; Knöchel, Reinhard H.
Author_Institution :
Microwave Lab., Univ. of Kiel, Kiel, Germany
Abstract :
Sensors based on materials with a giant magnetoelectric (ME) effect may be used to measure biomagnetic fields at room temperature. It is necessary to know the noise behavior of the whole detection unit. The noise level of a thin-film ME sensor was measured at room temperature, and suitable types of low-noise amplifiers were investigated. Noise measurements were carried out at room temperature. Results show a sensitivity value of 5.4 pT/ √Hz at a resonance frequency of 330 Hz. Furthermore, the signal-to-noise ratio was investigated in order to improve the sensitivity of the sensor.
Keywords :
giant magnetoresistance; low noise amplifiers; magnetic sensors; magnetoelectric effects; magnetometers; noise measurement; sensitivity; temperature measurement; thin film sensors; biomagnetic field; detection unit; frequency 330 Hz; giant magnetoelectric effect; low noise amplifier; magnetometers; material sensor; noise measurement; noise performance; resonant thin film magnetoelectric sensor; sensor sensitivity value; signal-to-noise ratio; temperature 293 K to 298 K; thin film ME sensor; Magnetic resonance; Magnetic sensors; Magnetometers; Magnetostriction; Noise; Temperature measurement; Magnetic field measurement; magnetoelectric (ME) sensors; magnetometers; noise;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2011.2122410
