CASPIAN JOURNAL
MANAGEMENT AND HIGH TECHNOLOGIES
Peculiarities in the design of magnetic field sensors based on the colossal magnetoresistance effect
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Read | Karpasyuk V.K., Smirnov A.M., Badelin A.G. Peculiarities in the design of magnetic field sensors based on the colossal magnetoresistance effect // Caspian journal : management and high technologies. — 2015. — №4. — pp. 291-297. |
Karpasyuk V.K. - D.Sc. (Physics and Mathematics), Professor, Astrakhan State University, 20a Tatishchev St., Astrakhan, 414056, Russian Federation, vkarpasyuk@mail.ru
Smirnov A.M. - Leading Engineer, Astrakhan State University, 20a Tatishchev St., Astrakhan, 414056, Russian Federation, sc_lab@bk.ru
Badelin A.G. - Junior Researcher, Astrakhan State University, 20a Tatishchev St., Astrakhan, 414056, Russian Federation, alexey_badelin@mail.ru
The paper considered the features of creation and operation of multi-element digital magnetic field sensors for a wide range of temperatures on the basis of ceramic manganites having colossal magnetoresistance. Reliability and repeatability of measurements requires taking into account nonlinear temperature and current-voltage characteristics of manganites and contact areas, as well as the influence of related effects on the measured values. This is achieved by using the procedures of advanced automatic calibration of the magnetically sensitive elements, what gives the opportunity to expand the permissible scatter of electromagnetic parameters of manganites and the range of operating temperatures. The need for thermal stabilization of sensors thus excluded. Design and operating characteristics of the sensor on the example of created experimental sample, as well as the algorithms of advanced calibration and information signals processing are described. The perspective development of the "intelligent" matrix systems for the analysis of inhomogeneous magnetic fields is discussed, including the use of manganites with new compositions, which allows to significantly increasing the sensitivity of the sensors.
Key words: манганиты, колоссальное магнитосопротивление, температура, магнитное поле, матричный датчик, экспериментальный образец, микропроцессорная обработка, автоматическая калибровка, параметры, manganites, colossal magnetoresistance, temperature, magnetic field,