Spintronics Spin Electronics
This article is devoted to developments in the field of spintronics. Spintronics (or spin electronics) is a section of quantum electronics that studies spin current transfer (spin-polarized transport) in solid substances, and the corresponding engineering field. In spintronics devices, unlike conventional electronics devices, energy or information transfers not electric current, but spin current.
2021: Transistor for Future Processors
The switching of magnets between spin states can transmit a logical signal, and this process can replace the transfer of electrons to. processors Scientist From MIPT and their colleagues from the Institute of Organoelemental Compounds named after A.N. Nesmeyanov Spain and managed to register a specific transition of the iron compound between states. This will help you develop processors and memory devices with a high ratio of performance to amount consumed. energy The results of a study supported by a foundation grant Russian scientific (RNF) are published in the journal Angewandte Chemie. This was reported on December 2, 2021 at the MIPT.
Existing processors, according to MIPT scientists, have almost reached the power limit, which is given by the fundamental properties of the components of the transistor device. To transfer information and carry out logical operations, they use electron transfer. Further acceleration of calculations requires a fundamentally different approach to the development of computer components. This can be helped by the achievements of spintronics - one of the most promising areas of microelectronics. Spintronics devices are based on the transfer of information through the interaction of magnetic moments of electrons. Magnetizable substances whose molecules contain one or more unpaired electrons are suitable for transferring information by exposing magnetic moments. Such compounds can be prepared using topical synthetic approaches that ensure the identity of all the resulting molecules. At the same time, their magnetic properties can be controlled by regulating the synthesis process. On the other hand, molecular magnets are subject to quite stringent requirements, the main of which is the possibility of the existence of their molecules in two different states. The transition between possible states and will allow you to store information and carry out logical operations.
The authors of the work investigated the behavior of a molecular system with two ferrous ions, each of which can exist in two states - high-spin (BC) and low-spin (HC). In this case, four summary states (HS-HS, HS-HS and HS-HS) are possible, wherein the HS-HS and HS-HS states are symmetrical to each other. It turned out that the transition between HC-HC and HC-HC states occurs on a microsecond time scale. Such dynamics are extremely difficult to detect due to the symmetry of molecules. To solve this problem, scientists have applied the method of nuclear magnetic resonance, in which the interaction of nuclear magnetic moments with a magnetic field, magnetic moments of unpaired electrons and with each other is recorded. However, the authors observed the interaction of magnetic moments of nuclei with moments of electrons. In this work, it was possible to register the transition between the HS-HS and the HS-HS states. It is important for researchers who are trying to develop devices for ultra-tight storage of information and its processing based on molecular systems.
 | "The systems we studied are of interest for the creation of so-called molecular cell automata - devices that potentially allow the creation of semiconductor-alternative technology for information processing. Automata have lower power consumption and heat generation than existing transistors. Elements of such devices - cells of quantum cell automata - preferably should be as small as possible. At the same time, each cell should easily switch between two equivalent states that differ only in symmetry. This is the system of molecular complexes we have studied. Further developments may lead to the creation of devices in which the logical signal is transmitted not by a stream of electrons, but by simultaneously switching the circuit-built cells of automata, each of which consists of one molecule. In this case, the power consumption of electronic circuits will be much less than classic semiconductor devices, and the performance will be higher, " explains Valentin Novikov, head of the Department of Chemical Physics of Functional Materials, MIPT, deputy director for scientific work of INEOS RAS. |  |
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