Non-Resonant Absorption of X-Band Electromagnetic Wave Power in a Narrow-Gap PbS Semiconductor at Temperatures of 2.6–8 K in the 0–100 mT Range of Magnetic Fields

• Published in: Bulletin of the Russian Academy of Sciences. Physics 2023-12, Vol.87 (12), p.1850-1855
• Main Authors: Ulanov, V. A., Zainullin, R. R., Sinitsyn, A. M., Potapov, A. A., Shustov, V. A.
• Format: Article
• Language: English
• Subjects: Absorption; Crystal defects; Crystal structure; Electric components; Electromagnetic radiation; Hadrons; Heavy Ions; Inclusions; Nuclear Physics; Physics; Physics and Astronomy; Resonators; Sulfur; Superconductivity; Superconductors; Superhigh frequencies; Wave power
• ISSN: 1062-8738; 1934-9432
• DOI: 10.1134/S1062873823704269

A study is performed of magnetic-dependent effects of the non-resonant absorption of electromagnetic wave energy in the resonator of an X-band EPR spectrometer associated with the superconductivity of metallic lead inclusions and microscopic structural defects in crystals of narrow-gap semiconductors PbS 1 – x and PbS 1 – x :Mn. It is shown that nanoscale lead particles in a polycrystalline PbS 0.96 material with a high content of sulfur vacancies at temperatures of 2.6–8 K manifest as type II superconductors and display good thermomagnetic stability. It is found that non-periodic bursts of microwave power absorption associated with avalanches of Abrikosov vortices and displaying no thermomagnetic stability of superconducting regions associated with defects in the crystal structure of a PbS 0.996 sample are observed in a single PbS 0.996 crystal with a much lower concentration of sulfur vacancies under the impact of the electric component of the microwave field in the resonator of an EPR spectrometer.