Search academic texts

Information × Registration Number 0225U000329, (0124U000558) , R & D reports Title Low-power thermoelectric and magnetoelastic converters for power generation and cooling systems popup.stage_title Виготовлення матеріалів для термоелектричних елементів та магнітопружних перетворювачів та визначення їх фізичних властивостей Head Konoplyuk Serhii M., Доктор фізико-математичних наук Registration Date 09-01-2025 Organization Institute of Magnetism NAS of Ukraine and MES of Ukraine popup.description1 Increasing the efficiency of thermoelectric generation based on new materials and principles, as well as the creation of magnetoelastic transducers for solid-state refrigerators, sensors and designing transdusers models. popup.description2  During the first stage of the project "Low-power thermoelectric and magnetoelastic converters for power generation and cooling systems", materials were prepared and studied for further use in thermoelectric modules and magnetoelastic converters. In particular, the elastocaloric alloys of the Ni-Ti-V, Ni-Mn-In-Co, Ni-Mn-In, Fe-Mn-Ga, Ni-Mn-Sn, and Ni-Fe-Ga systems were melted and their physical properties were studied. The results of measuring the magnetocaloric effect in the Fe-Mn-Ga system alloy indicate that the main contribution to this effect occurs in the temperature interval of magnetic transformation between the ferro- and antiferromagnetic phases of the fcc structure. The MCE can be significantly enhanced due to the magnetoinduced transition between these phases. The measurements of the magnetic and transport characteristics of the Ni-Mn-In alloy system allowed us to establish that the alloy is characterized by hole conductivity due to ordinary Hall effect and negative anomalous Hall conductivity, which doubles under the action of hydrostatic compression due to martensitic transformation and reaches a value of more than 1100 Ohm-1•cm-1. As a result of ab initio calculations, the band structure was calculated and the Hall conductivity of the Sr2FeMoO6 compound was established. Studies carried out within the framework of the first stage of the project showed that the alloy of Ni-Mn-In system and the semiconductor compound MnO2 can be used as thermoelectric materials in a hybrid module that generates a transverse Hall voltage. Product Description popup.authors Derecha Dmytro O. Krаvets Anаtolii F. Krupa Mykola M. Skyrta Yurii B. Titenko Anatolii M. popup.nrat_date 2025-01-09 Close