According to the website of the Siberian Branch of the Russian Academy of Sciences, the Institute of Physics of the Krasnoyarsk Science Center of the branch, together with the Siberian Federal University and the Siberian University of Science and Technology, studied the hysteresis of the nanomagnetic composite material and established the micromagnetic Theory and model, the materials developed on this basis can be used in the fields of electrical engineering, information technology and the manufacture of new functional components. Related results were published in the Journal of Magnetism and Magnetic Materials.
The performance of nano-magnetic materials determines that the application fields of this material are mainly in the fields of nanoelectronics, catalytic technology, environmental protection and biomedicine, and some materials may undergo hysteresis. The performance of single magnetic nanoparticles in the magnetic field has been intensively studied, and the subject of the interaction effect between particles in large-scale magnetic materials is being studied, which is mainly the phenomenon of magnetic dipole-dipole interaction. The team research found that as the distance between the particles increases, the interaction force decreases relatively slowly, which shows that the performance of the material depends on the bulk density of the magnetic particles, and this composite material has a very large saturation magnetization, high Resistivity and very wide range of permeability.
In consideration of the soft magnetic axial direction of the particles, the relationship between the magnetic dipole-dipole interaction force of randomly distributed nanoparticles with different average density planes and the distance between the particles was calculated in detail, and the results are completely consistent (magnetic particles are distributed in Non-magnetic substrates) Standard magnetic powder magnetomechanical study conditions, and the magnetic dipole-dipole interaction force can be used to adjust the non-linear relationship between the coercive force and the density of magnetic particles in the material. Determined by anisotropic energy and dipole energy.
The established model can describe the performance of nano-magnetic composite materials. One of the important points is that the magnetic properties of thin film materials depend on the proportional relationship between the magnetic and non-magnetic phases of the material. Proper selection of the magnetic particle density of the material can greatly optimize its performance.
The thin film added with magnetic nanoparticles is a functional material and can be used in the fields of radio electronics, microelectronic high-frequency devices, computer equipment, etc., used to manufacture magnetic sensors, magnetic screens, and magneto-optical memory elements, etc., such as used in wireless networks to improve data The speed of transmission.
This research was jointly supported by the Russian Basic Research Fund and the Krasnoyarsk Krai Science and Technology Fund.
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