Article (Scientific journals)
Magnetic Field Influence on the Microwave Characteristics of Composite Samples Based on Polycrystalline Y-Type Hexaferrite.
Kolev, Svetoslav; Georgieva, Borislava; Koutzarova, Tatyana et al.
2022In Polymers, 14 (19), p. 4114
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Keywords :
Y-type hexaferrite; external magnetic field; magnetic properties; microwave properties; reflection losses; Composite samples; Hexaferrites; Magnetic field influence; Magnetic-field; Microwave characteristics; Microwave property; Polycrystalline; Reflection loss; Chemistry (all); Polymers and Plastics; General Chemistry
Abstract :
[en] 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 range of the Y-type hexaferrite powder dispersed homogeneously in a polymer matrix of silicon rubber were investigated in the absence and in the presence of a magnetic field. A permanent magnet was used with a strength of 1.4 T, with the magnetic force lines oriented perpendicularly to the direction of the electromagnetic wave propagation. In the case of using an external magnetic field, an extraordinary result was observed. The microwave reflection losses reached a maximum value of 35.4 dB at 5.6 GHz in the Ku-band without a magnetic field and a maximum value of 21.4 dB at 8.2 GHz with the external magnetic field applied. The sensitivity of the microwave properties of the composite material to the external magnetic field was manifested by the decrease of the reflected wave attenuation. At a fixed thickness, tm, of the composite, the attenuation peak frequency can be adjusted to a certain value either by changing the filling density or by applying an external magnetic field.
Disciplines :
Physics
Chemistry
Author, co-author :
Kolev, Svetoslav ;  Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria ; Department of Physics, Faculty of Mathematics and Natural Science, Neofit Rilski South-Western University, 66 Ivan Mihailov Str., 2700 Blagoevgrad, Bulgaria
Georgieva, Borislava ;  Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria
Koutzarova, Tatyana ;  Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria
Krezhov, Kiril ;  Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria
Ghelev, Chavdar;  Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria
Kovacheva, Daniela;  Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., bld. 11, 1113 Sofia, Bulgaria
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Closset, Raphaël ;  Université de Liège - ULiège > Département de chimie (sciences)
Tran, Lan Maria ;  Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Ul. Okólna 2, 50-422 Wroclaw, Poland
Babij, Michal;  Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Ul. Okólna 2, 50-422 Wroclaw, Poland
Zaleski, Andrzej J ;  Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Ul. Okólna 2, 50-422 Wroclaw, Poland
Language :
English
Title :
Magnetic Field Influence on the Microwave Characteristics of Composite Samples Based on Polycrystalline Y-Type Hexaferrite.
Publication date :
30 September 2022
Journal title :
Polymers
ISSN :
2073-4360
Publisher :
MDPI, Switzerland
Volume :
14
Issue :
19
Pages :
4114
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BNSF - Bulgarian National Science Fund [BG]
Funding text :
This research was funded by the Bulgarian National Science Fund (grant number KP-06-N48/5).
Available on ORBi :
since 23 December 2022

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