The department has extensive experience in the development of the magnetic devices, including the use of nanostructured materials, which are used in the study of biological structure of the geomagnetic field in navigation systems, as well as sensitive elements of the magnetic scanning microscopes – head prof. L.Z.Lubyany.
Together with scientists from the Department of metals and superconductors physics the physical basics of highly sensitive sensor creating was developed. The necessary conditions for the effective operation of such a sensor are a special mode of magnetization reversal cores (via coherent rotation of magnetization vectors) and the presence special segments with a small radius of curvature on magnetization curve. The technique of production the magnito-soft film compositions answering these conditions was developed. Test of sensors showed that the threshold reaches 10-11T with a signal/noise ratio 10 to the excitation frequency 100MHz. These sensors with appropriate revision will be suitable for the measurement of ultra-low fields produced by biological, aerospace and geomagnetic objects, as well as nano-objects.
Measuring system on the basis of magnetic noise structure analyzer with the computer processing of experiment results was developed. It is a virtual device for analog recording and processing of magnetic noise in the magnetic material. A LabVIEW program can statistically process the input signal to calculate the main parameters such as density distribution of the magnetic noise dN/dH, its amplitude distribution, value of the coercive force Hc, three-dimensional distribution dN/dH in layers, and to display them in the graphs form.
