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Akademický článek

Structural study of W2B obtained via mechanical alloying of W, B4C, TiC and graphite before and after He ions irradiation

Autor: D. Neov, L. Slavov, A.A. Donkov, M.N. Mirzayev, E. Popov, E. Demir, K. Siemek, N. Djourelov, V.A. Turchenko, Z.A. Sharipov, P. Horodek, A.I. Beskrovnyi, A.H. Valizade, O.A. Samedov, A. Vladescu, K. Krezhov, I. Felicia

Publikováno v: Nuclear Materials and Energy, Vol 31, Iss , Pp 101201- (2022)

Elemental powders of W, B4C, TiC and C (graphite) in percentage weight ratio of W-–6 wt% B4C–2 wt% TiC–1 wt% C are used as precursors in mechanical alloying process aimed at producing tungsten-based material. The composition of the obtained mat

Externí odkaz: https://doaj.org/article/e0795bc13d884722b07dab87adcf3f81

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Half Replacement of Bismuth by Neodymium in Half-Hole Doped Bismuth-Based Manganites Bi0.25Nd0.25X0.5MnO3 (X = Sr, Ca): a Neutron Diffraction Study

Autor: Ts. Nonova, K. Krezhov, T. Malakova

Publikováno v: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. 14:S117-S121

The effect of half substitution of diamagnetic Bi3+ with the rare earth magnetic Nd3+ ion on the magnetic and structural properties of the polycrystalline Bi0.25Nd0.25Sr0.5MnO3 and Bi0.25Nd0.25Ca0.50MnO3 was studied by X-ray and neutron diffraction c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::94c358f54ef2eb8a054a85fb967d97a3
https://doi.org/10.1134/s1027451020070307

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Investigation of the formation of defects under fast neutrons and gamma irradiation in 3C?SiC nano powder

Autor: M. N. Mirzayev, E. Popov, F. Mamedov, M.V. Bulavin, E. Demir, M. Yu. Tashmetov, I.G. Genov, K. Siemek, P. Horodek, K. Krezhov, V.A. Turchenko, A.A. Donkov, D. M. Mirzayeva, Thabsile Theodora Thabethe, B. A. Abdurakhimov, T.X. Thang, T.Z. Abdurakhmonov

In this work cubic phase, silicon carbide nano-powders were irradiated at the high-flux pulsed reactor IBR–2 (Dubna, Russia). The 3C–SiC powder was irradiated with neutron doses up to 1015 n/cm2. The irradiated samples were then analyzed using X-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34bbc87e40d05ce88dfba88eeb6ebd46

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Effect of cation substitutions in Y-type Ba0.5Sr1.5Me2Fe12O22 hexaferrites on the magnetic phase transitions

Autor: B Georgieva, S Kolev, Ch Ghelev, K Krezhov, D Kovacheva, B Vertruyen, R Closset, L-M Tran, M Babij, A Zaleski, T Koutzarova

Publikováno v: Journal of Physics: Conference Series. 2240:012023

We investigated the magnetic properties and magnetic phase transition in Y-type Ba0.5Sr1.5NiMgFe12O22 hexaferrite powder prepared by citrate sol-gel spontaneous combustion. The saturation magnetisation value of 32 emu/g at 4.2 K was lowered to 24 emu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::134135277ce7acacaee152ace15262d2
https://doi.org/10.1088/1742-6596/2240/1/012023

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Akademický článek

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Akademický článek

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Laser double-heterodyne integrated microscopy of magnetoelectric nanofilms

Autor: S. Penchev, V. Pencheva, K Krezhov, I. Nedkov

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28c556a409666b079bc8ebc985b638c3
https://doi.org/10.1016/j.vacuum.2013.02.010

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Structure study of BaCe0.85Y0.15O3-Δ as solid state fuel cell material

Autor: D. Dimitrov, K. Krezhov, E. Svab, Daria Vladikova, G. Raikova, I. Genov, M. Fabian, T. Malakova

Publikováno v: AIP Conference Proceedings.

The structural details of powder, dense and porous samples of BaCe0.85Y0.15O3−δ (BCY15) used recently in an innovative monolithic design of SOFC were studied from multiple Rietveld analysis of neutron and x-ray diffraction patterns. The 3-layered

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::589e33c40cc1e8ba58b026baa9304ce3
https://doi.org/10.1063/1.4944198

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Detection of environmental changes using hyperspectral remote sensing

Autor: Dora Krezhova, Nikolai Petrov, I. Moskova, K. Krezhov, Svetla Maneva

Publikováno v: AIP Conference Proceedings.

Hyperspectral remote sensing technique, based on reflectance measurements acquired in a high number of contiguous narrow spectral bands in the visible and near infrared spectral ranges, was used to detect and assess the influence of some adverse envi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d268852268ea449f57a40164157ad973
https://doi.org/10.1063/1.4944275

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Double perovskite Sr2FeMoO6−N (x=0.3, 1.0) oxynitrides with anionic ordering

Autor: K. Krezhov, Nieves Menéndez, Florence Porcher, José Antonio Alonso, María Jesús Martínez-Lope, C. de la Calle, Maria Retuerto

Publikováno v: Journal of Solid State Chemistry. 185:18-24

Two new oxynitride double perovskites of composition Sr{sub 2}FeMoO{sub 6-x}N{sub x} (x=0.3, 1.0) have been synthesized by annealing precursor powders obtained by citrate techniques in flowing ammonia at 750 Degree-Sign C and 650 Degree-Sign C, respe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::684fdf8a95ace13534c7f7904a25b784
https://doi.org/10.1016/j.jssc.2011.10.026

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