Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Svetoslav Kolev"'
Autor:
Svetoslav Kolev, Borislava Georgieva, Tatyana Koutzarova, Kiril Krezhov, Chavdar Ghelev, Daniela Kovacheva, Benedicte Vertruyen, Raphael Closset, Lan Maria Tran, Michal Babij, Andrzej J. Zaleski
Publikováno v:
Polymers, Vol 14, Iss 19, p 4114 (2022)
Here, we report results on the magnetic and microwave properties of polycrystalline Y-type hexaferrite synthesized by sol-gel auto-combustion and acting as a filler in a composite microwave-absorbing material. The reflection losses in the 1–20 GHz
Externí odkaz:
https://doaj.org/article/34aa6d8b2ef648edadec2e106a2429d3
Autor:
Tatyana Koutzarova, Svetoslav Kolev, Kiril Krezhov, Borislava Georgieva, Chavdar Ghelev, Daniela Kovacheva, Benedicte Vertruyen, Raphael Closset, Lan Maria Tran, Michal Babij, Andrzej J. Zaleski
Publikováno v:
Data in Brief, Vol 31, Iss , Pp 105803- (2020)
The data presented has to do with identifying the various phases arising during the synthesis of the Y-type hexaferrite series Ba0.5Sr1.5Zn2-xNixFe12O22 by auto-combustion that we deem important for their microstructural and magnetic properties. The
Externí odkaz:
https://doaj.org/article/8629b6361de54235b62de123a4992810
Autor:
Svetoslav Kolev, Petya Peneva, Kiril Krezhov, Tanya Malakova, Chavdar Ghelev, Tatyana Koutzarova, Daniela Kovacheva, Benedicte Vertruyen, Raphael Closset, Lan Maria Tran, Andrzej Zaleski
Publikováno v:
Materials, Vol 13, Iss 10, p 2355 (2020)
We report results on the structural and microwave properties and magnetic phase transitions in polycrystalline Sr3Co2Fe24O41 hexaferrite synthesized by sol-gel auto-combustion and acting as a filler in a composite microwave absorbing material. The ze
Externí odkaz:
https://doaj.org/article/9613f3b18dcb4fadb30b9fe3ae42be16
Autor:
Tatyana Koutzarova, Svetoslav Kolev, Kiril Krezhov, Borislava Georgieva, Daniela Kovacheva, Chavdar Ghelev, Benedicte Vertruyen, Frederic Boschini, Abdelfattah Mahmoud, Lan Maria Tran, Andrzej Zaleski
Publikováno v:
Materials, Vol 12, Iss 9, p 1414 (2019)
Ba2Mg0.4Co1.6Fe12O22 was prepared in powder form by sonochemical co-precipitation and examined by X-ray diffraction, Mössbauer spectroscopy and magnetization measurements. Careful XRD data analyses revealed the Y-type hexaferrite structure as an alm
Externí odkaz:
https://doaj.org/article/ab5ea24e0249487e91840ad5ec309922
Publikováno v:
ACS Omega. 7:44485-44494
Hexaferrites have long been the object of extensive studies because of their great possibility for applications-permanent magnets, high-density recording media, microwave devices, in biomedicine, to name but a few. Lately, many researchers' efforts h
Autor:
Michal Babij, Kiril Krezhov, Bénédicte Vertruyen, Daniela Kovacheva, Lan Maria Tran, Borislava Georgieva, Tatyana Koutzarova, A. J. Zaleski, Svetoslav Kolev, Raphael Closset, Chavdar Ghelev
Publikováno v:
Data in Brief, Vol 31, Iss, Pp 105803-(2020)
The data presented has to do with identifying the various phases arising during the synthesis of the Y-type hexaferrite series Ba0.5Sr1.5Zn2-xNixFe12O22 by auto-combustion that we deem important for their microstructural and magnetic properties. The
Autor:
Borislava Georgieva, A. J. Zaleski, Kiril Krezhov, Lan Maria Tran, Michal Babij, Daniela Kovacheva, Svetoslav Kolev, Bénédicte Vertruyen, Tatyana Koutzarova, Raphael Closset, Chavdar Ghelev
We consider the influence of the magnetic cation (Ni2+) substitution on the structural and magnetic properties of Ba0.5Sr1.5Zn2-xNixFe12O22 (x = 0.8, 1, 1.5) powders. The powders were synthesized by using the citric-acid sol–gel auto-combustion met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1332659ee142b51c257f6ef729775687
Autor:
Bénédicte Vertruyen, Michal Babij, Borislava Georgieva, A. J. Zaleski, Kiril Krezhov, Daniela Kovacheva, Chavdar Ghelev, Tatyana Koutzarova, Svetoslav Kolev, Raphael Closset, Lan Maria Tran
Publikováno v:
Journal of Magnetism and Magnetic Materials. 477:131-135
We present results from a study on the influence of the preparation technique on the structural and magnetic properties of Ba 0.5 Sr 1.5 Zn 2 Fe 12 O 22 powders synthesized by citric-acid sol-gel auto-combustion and sonochemistry and characterized by
Autor:
Bénédicte Vertruyen, Daniela Kovacheva, L-M Tran, Michal Babij, Svetoslav Kolev, Borislava Georgieva, A. J. Zaleski, Ch Ghelev, Kiril Krezhov, Tatyana Koutzarova, Raphael Closset
We report studies on the effect of substituting the magnetic Fe3+ cations with nonmagnetic Al3+ cations in Y-type hexaferrite Ba0.5Sr1.5Zn2Fe11.92Al0.08O22 powders on their magnetic properties and especially on the magnetic phase transitions responsi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dd825dafec59ee9b12108a43e53e129
Autor:
Bénédicte Vertruyen, Svetoslav Kolev, Lan Maria Tran, Tanya Malakova, Kiril Krezhov, Tatyana Koutzarova, Petya Peneva, Raphael Closset, Daniela Kovacheva, A. J. Zaleski, Chavdar Ghelev
Publikováno v:
Materials
Volume 13
Issue 10
Materials, Vol 13, Iss 2355, p 2355 (2020)
Volume 13
Issue 10
Materials, Vol 13, Iss 2355, p 2355 (2020)
We report results on the structural and microwave properties and magnetic phase transitions in polycrystalline Sr3Co2Fe24O41 hexaferrite synthesized by sol-gel auto-combustion and acting as a filler in a composite microwave absorbing material. The ze