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

Volume

60

Issue

8

fYear

2011

Firstpage

2995

Lastpage

3001

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2011.2122410

Filename

5742699