ANOMALOUS OF RESISTANCE AND MAGNETIC SUSCEPTIBILITY AT 280-310 K AND AMBIENT PRESSURE IN BISMUTH CUPRATES SYNTHESIZED BY SOLAR ENERGY

Authors

Dilbara Dj. GULAMOVA, Materials Science Institute, Tashkent, UzbekistanFollow
Elyor B. ESHONKULOV, Materials Science Institute, Tashkent, UzbekistanFollow
Valeriya R. LI, Moscow Institute of Steel and Alloys branch, Almalik, UzbekistanFollow
Grigor I. MAMNIASHVILI, Tbilisi State University, Tbilisi, GeorgiaFollow
Timur I. GULAMOV, Moscow Institute of Steel and Alloys branch, Almalik, UzbekistanFollow

Abstract

In order to obtain the full content of high-temperature superconducting phases using the “Super Fast Alloys Quenching” technology in the Large Solar Furnace (Parkent), precursors of bismuth cuprates of the series Bi_1,7Pb_0,3Sr₂Ca_(n-1)Cu_nO_y, n=3-30 were synthesized. Methods for study the properties of precursors are presented. The oriented nano-sized microstructure and layered structure of nanocrystalline nuclei are shown. The phase composition of the precursors at the beginning of the series (n=3-5) is represented by X-ray amorphous and crystalline phases. An increase in the content of CaO and CuO destabilizes the amorphous phase. The crystalline basis of all precursors is identical. Graphs of the resistance and magnetic susceptibility of Bi_1,7Pb_0,3Sr₂Ca_(n-1)Cu_nO_y, (n=5,12,30) precursors show abnormally sharp effects in the temperature range 275-310 K at atmospheric pressure, daylight. The manifestation of the Meissner effect, anomalies in resistance and magnetic susceptibility below 270 K suggest superconductivity of the precursors of the series Bi_1,7Pb_0,3Sr₂Ca_(n-1)Cu_nO_y, n=5, 12, 30 at room temperature.

Recommended Citation

GULAMOVA, Dilbara Dj.; ESHONKULOV, Elyor B.; LI, Valeriya R.; MAMNIASHVILI, Grigor I.; and GULAMOV, Timur I. (2024) "ANOMALOUS OF RESISTANCE AND MAGNETIC SUSCEPTIBILITY AT 280-310 K AND AMBIENT PRESSURE IN BISMUTH CUPRATES SYNTHESIZED BY SOLAR ENERGY," CHEMISTRY AND CHEMICAL ENGINEERING: Vol. 2024: No. 1, Article 2.
DOI: https://doi.org/10.34920/cce202412
Available at: https://cce.researchcommons.org/journal/vol2024/iss1/2