Group from the scientific and educational center “functional nanomaterials"of BFU. I. Kant (BFU) together with the international scientific group is considered the Association between the structure of clay materials is dependent on bismuth ferrite (BiFeO3) and their magnetic qualities.

In their own work, scientists hypothetically proved the acquired results and identified the variables acting on the additional formation of materials and the change of their magnetic behavior. The work will undoubtedly help to prepare fresh clay materials with these qualities.

The design of bismuth ferrite is similar to the structure of perovskite, a mineral based on calcium and titanium, but, apart from this, it has air atoms. Familiar high-temperature superconductors (i.e. materials ready to conduct current without resistance at specific temperatures) have a similar structure. As microprocessors of solar energy, countless materials with perovskite-like crystal lattices are used.

At a time when the various component particles added in the starting of bismuth ferrite, it causes the configuration in the crystalline grid and that way in the physical properties. Scientists have connected it to the metal particles (calcium, manganese, titanium and niobium) and evaluated the magnetic properties of the material. It turned out that the connection of fresh atoms causes the pressure of the cross section of the crystal lattice, not enough paying interest to the picture of the transition components.

This, in this way, is coupled with changes in the magnetic structure of the material. He loses no limit for the polarization, i.e. the dipole factors of the atoms that determine the course of electrical forces, are not permitted to a fixed accession no external e-field. At that moment, when the bismuth ferrite added particles of various metals, the final further loses its own ferromagnetic qualities: dipole images IOT never more coordinated friend with the other.

Apart from this, when calcium enters the composition of niobium or titanium, the magnetic structure of the material is converted into ferromagnetic: dipole min.moved is made co-directional. Subsequently, such as the influence of the magnetic field ended, these standards have proven residual magnetism, a property characteristic of ferromagnetic materials.

Vadim Sikolenko, co-author of the work, candidate of physical and mathematical Sciences, that “ " we have shown that the magnetic qualities of materials based on bismuth ferrite are significantly guided by structural distortions caused by substitutions, lattice defects, and even the nature of exchange interactions between atoms of iron, air and transition metal.”

"The weak ferromagnetic States that appeared when calcium was added to the tissue together with titanium or niobium are explained by the reaction between magnetic atoms that flows through non-magnetic ones. As a rule, it is not provided for because of its insignificant values, but in the case of ferromagnetic materials has the ability to cause important fluctuations in the magnetic behavior of the material.”

A note by researchers was published in the journal "physics and chemistry of rigid bodies".