Open AccessCombined Magnetic Field Sensor with Nanostructured Elements
Author(s) -
Л. П. Ичкитидзе,
С. В. Селищев,
D. V. Telyshev
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1182/1/012015
Subject(s) - magnetic field , concentrator , materials science , superconductivity , magnet , optoelectronics , spintronics , magnetometer , sensitivity (control systems) , squid , nanotechnology , optics , condensed matter physics , electrical engineering , ferromagnetism , electronic engineering , physics , engineering , ecology , quantum mechanics , biology
A combined magnetic field sensor consisting of a magnetic field concentrator based on a superconducting ring film and a magnetically sensitive element with a spintronics structure is investigated. The active strip (narrowed part) of the concentrator is separated by an insulating film from the magnetically sensitive element, i.e. the combined magnetic field sensor is a sandwich. It has been established that the concentration coefficient of a sandwich-type magnetic field can be increased by fragmentation (nanostructuring) of the active band, in the form of several superconducting branches and cuts 20 nm wide. Increasing the number of incisions also reduces the threshold sensitivity of the sensor by several times. Nanostructured elements in the form of nanoscale sections in the active strip allow you to reduce the diameter of the concentrator ring, which allows the sensor to make the maximum linear size less than 1mm. It is noted that the considered combined magnetic field sensor with nanostructured elements has a high potential for detecting ultraweak magnetic fields (∼ 10 pT), and apparently, can be an alternative to SQUID.