Zobrazeno 1 - 10
of 130
pro vyhledávání: '"I. Nedkov"'
Autor:
D. Stoyanov, Z. Cherkezova-Zheleva, R. Ilieva, B. Angelova, Veneta Groudeva, I. Nedkov, M. Iliev
Publikováno v:
IOP Conference Series: Materials Science and Engineering. 1056:012014
This study of particulate matter (PM) pollution was conducted in May and June 2020 during the COVID-19 lockdown in residential areas of the Bulgarian capital Sofia. Its methodology was based on lidar monitoring of the ground layer of the atmosphere a
Publikováno v:
Vacuum. 96:7-11
Aspects of photothermal characterization of magnetoelectric nanofilms are presented. The parameters of the study include photomodulated surface reflectance and displacement of various nanostructures. A subsequent application is developed for assessme
Publikováno v:
Physica C: Superconductivity. 471:577-581
The effect of DC current injection on the AC current carrying characteristics of superconducting thin film rings was analyzed because of the possibility for using similar ferromagnetic/high temperature superconducting (FM/HTS) structures for contactl
Publikováno v:
physica status solidi c. 3:1308-1315
Institute of Electronics, Bulg. Acad. Sci., 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria Received 5 July 2005, accepted 11 November 2005 Published online 17 January 2006 PACS 75.50.Tt, 78.70.Gq The object of this work is to investigate the microwav
Publikováno v:
Surface and Coatings Technology. 125:313-316
The demand for hard and superhard coatings has inspired many investigators in their attempts to synthesise β-C 3 N 4 . CN x thin films were deposited on c-silicon substrates with simultaneous nitrogen ion bombardment. An electron beam was used for g
Autor:
I Nedkov
Publikováno v:
Superconductor Science and Technology. 11:21-25
The volume of the grain boundaries is a small percentage of the total volume of a polycrystalline superconducting material, but their contribution to the superconductor's properties is paramount. The present work analyses the influence of the variati
Publikováno v:
Journal of Low Temperature Physics. 107:497-502
We present results concerning the effect of adding potassium and excess copper (1÷5 wt.%) to the initial powder Y(1-0.2x)Ba(2-0.2x)KxCu3Oy, (x=0÷0.95) on the a.c. complex susceptibility and the development of the microstructure within the YBCO high
Autor:
I. Nedkov
Publikováno v:
Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 1997, 07 (C1), pp.C1-201-C1-202. ⟨10.1051/jp4:1997175⟩
Journal de Physique IV Proceedings, EDP Sciences, 1997, 07 (C1), pp.C1-201-C1-202. ⟨10.1051/jp4:1997175⟩
An attempt was made to adapt the domain-wall size model to the explanation of magnetization mechanisms in real polycrystalline hard ferrites (SrFe 12 O 19 ). Some new data concerning the total anisotropy specifically for polycrystals were discussed a
Publikováno v:
Applied Physics A: Materials Science & Processing. 74:s1086-s1088
A neutron-diffraction study was performed on micro- and nanocrystalline BaFe10.3Co0.85Ti0.85O19 samples prepared by soft chemistry. Substitution and grain-size effects on the crystal structure were analysed in the P63/mmc space group using Rietveld r
Autor:
Z. Somogyváari, Françoise Bourée, Erzsébet Sváb, Kiril Krezhov, I. Nedkov, Gy. Mészáros, István E. Sajó
Publikováno v:
Applied Physics A: Materials Science & Processing. 74:s1077-s1079
Powder neutron and X-ray diffraction patterns of nanocrystalline needle-shaped maghemite (γ-Fe2O3) particles with average size 240nm×30nm show the presence of superstructure peaks indicating a long-range ordering of the cation vacancies. The crysta