This name is the historical name of 15 chemical elements: lanthanum (Z=57) and 14 lanthanides (from Ce, Z=58 to Lu, Z=71). These elements are located in the sixth period of the periodic table. Rare earth elements also include scandium (Z=21) and yttrium (Z=39). Because the history of the discovery and study of these elements is closely connected with the history of rare earth elements.

    In nature, rare earth elements are usually found close to each other. Currently, about 250 rare earth minerals are known that cannot be classified as classical rare earth elements.

    Obid Sulaimonov, PhD student at the Faculty of Physics of Samarkand State University, conducts scientific research on the magnetic properties of chromium borates based on rare earth elements at high temperatures.

    - Today, in international physics, much attention is paid to the study of various properties of rare-earth metal chromoborates RCr3(BO3)4, including magnetic properties, - says Obid Sulaimonov. - Interest in such substances lies in their optical properties, wide use in laser devices, the development of computer technology and the creation of new generations of high-capacity storage devices. It also plays an important role in the development of spintronics.

    Data on the magnetic properties and electronic structure of lanthanide chromium borates with 3d and 4f cations, which have such properties, are scarce due to their high-temperature fields.

    In connection with the complex crystal and magnetic structure of chromoborates, it is necessary to determine the features of the magnetic state and electronic structure of magnetically active ions in them, as well as the mechanism of magnetic, structural, electronic and spatial transitions occurring in them. them and determine the parameters of the exchange interaction, which is important for the development of the physics of magnetic phenomena and from the point of view of their practical application.

    The relevance of the research is to study the electrical and magnetic properties of such magnetic materials at high temperatures. Thanks to this, we can obtain the corresponding important characteristics of the thermal properties of substances.

 

Otabek Sadullayev,

Information Service Officer of

Samarkand State University.

The photographs were taken by Shavkat Akramov.