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Magnetic resonance in bilayers of ferrite and functionally graded piezoelectric
Bichurin, M.I.,Petrov, R.V.,Petrov, V.M.,Saplev, A.F.,Tatarenko, A.S.,Kovalenko, D.V.,Melnichuk, D.G.,Yang, Su-Chul Elsevier 2017 Materials research bulletin Vol.96 No.3
<P><B>Abstract</B></P> <P>The particular purpose of this paper is theoretical modeling of magnetoelectric interactions at the ferromagnetic resonance in a layered structure of a ferrite and a piezoelectric with through-thickness graded polarization. We show that using the functionally graded piezoelectric with through-thickness variation of polarization can lead to an electric field induced broadening of ferromagnetic resonance line. As an example, we consider the laminate based on the yttrium iron garnet layer which is placed between two lead zirconate titanate layers with different poling direction. The maximal ferromagnetic resonance line broadening of 9.3Oe is obtained for the yttrium iron garnet to lead zirconate titanate layer thickness ratio of 1.7 at 9.3GHz for E equal to 10kV/cm.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ferromagnetic resonance in a ferrite-piezoelectric laminate is studied. </LI> <LI> An electric field induced FMR line broadening results from bending the sample. </LI> <LI> Ferrite layer between the two piezoelectric layers shows a large line broadening. </LI> </UL> </P>
“Lomonosov” Satellite—Space Observatory to Study Extreme Phenomena in Space
Sadovnichii, V. A.,Panasyuk, M. I.,Amelyushkin, A. M.,Bogomolov, V. V.,Benghin, V. V.,Garipov, G. K.,Kalegaev, V. V.,Klimov, P. A.,Khrenov, B. A.,Petrov, V. L. Springer Science + Business Media 2017 Space science reviews Vol.212 No.3
<P>This paper is directed towards the general description of both scientific goals of the project and scientific equipment on board the satellite. The following papers of this issue are devoted to detailed descriptions of scientific instruments.</P>
The TUS Detector of Extreme Energy Cosmic Rays on Board the Lomonosov Satellite
Klimov, P. A.,Panasyuk, M. I.,Khrenov, B. A.,Garipov, G. K.,Kalmykov, N. N.,Petrov, V. L.,Sharakin, S. A.,Shirokov, A. V.,Yashin, I. V.,Zotov, M. Y.,Biktemerova, S. V.,Grinyuk, A. A.,Grebenyuk, V. M. Springer-Verlag 2017 Space science reviews Vol.212 No.3
<P>It will also be able to register slower atmospheric transient events: atmospheric fluorescence in electrical discharges of various types including precipitating electrons escaping the magnetosphere and from the radiation of meteors passing through the atmosphere. We describe the design of the TUS detector and present results of different ground-based tests and simulations.</P>
Wide-Field Gamma-Spectrometer BDRG: GRB Monitor On-Board the Lomonosov Mission
Svertilov, S. I.,Panasyuk, M. I.,Bogomolov, V. V.,Amelushkin, A. M.,Barinova, V. O.,Galkin, V. I.,Iyudin, A. F.,Kuznetsova, E. A.,Prokhorov, A. V.,Petrov, V. L.,Rozhkov, G. V.,Yashin, I. V.,Gorbovskoy D. Reidel Pub. Co 2018 Space science reviews Vol.214 No.1
( A. S. Berdinsky ),( D. Fink ),( Hui Gon Chun ),( Yong Zoo Yoo ),( Ji Beom Yoo ),( A. V. Petrov ),( P. S. Alegaonkar ) 한국센서학회 2004 센서학회지 Vol.13 No.5
N/A It is known that the conductivity of fullerite depends on the applied pressure. In this paper we compare the variation of conductivity of three different fullerite structure with pressure. We examined C_(60) powder, filled into thin glass capillaries and also studied fullerite nanotubules produced within etched swift heavy ion tracks in polymer foils. These investigations are compared with the results of planar Si-C_(60)-Au structures.
Passive Q-switching of microchip lasers based on Ho:YAG ceramics
Lan, R.,Loiko, P.,Mateos, X.,Wang, Y.,Li, J.,Pan, Y.,Choi, S. Y.,Kim, M. H.,Rotermund, F.,Yasukevich, A.,Yumashev, K.,Griebner, U.,Petrov, V. Optical Society of America 2016 Applied Optics Vol.55 No.18
<P>A Ho:YAG ceramic microchip laser pumped by a Tm fiber laser at 1910 nm is passively Q-switched by single-and multi-layer graphene, single-walled carbon nanotubes (SWCNTs), and Cr2+:ZnSe saturable absorbers (SAs). Employing SWCNTs, this laser generated an average power of 810 mW at 2090 nm with a slope efficiency of 68% and continuous wave to Q-switching conversion efficiency of 70%. The shortest pulse duration was 85 ns at a repetition rate of 165 kHz, and the pulse energy reached 4.9 mu J. The laser performance and pulse stability were superior compared to graphene SAs even for a different number of graphene layers (n = 1 to 4). A model for the description of the Ho:YAG laser Q-switched by carbon nanostructures is presented. This modeling allowed us to estimate the saturation intensity for multi-layered graphene and SWCNT SAs to be 1.2 +/- 0.2 and 7 +/- 1 MW/cm(2), respectively. When using Cr2+:ZnSe, the Ho:YAG microchip laser generated 11 ns/25 mu J pulses at a repetition rate of 14.8 kHz. (C) 2016 Optical Society of America</P>
Agnesi, A.,Greborio, A.,Pirzio, F.,Ugolotti, E.,Reali, G.,Sun Young Choi,Rotermund, F.,Griebner, U.,Petrov, V. IEEE 2012 IEEE journal on selected topics in quantum electro Vol.18 No.1
<P>In this paper, single-mode 200-mW laser diodes have been demonstrated to be very effective pump devices for low-power Nd:glass lasers, yielding the remarkable continuous wave (cw) slope efficiency of 46.5% for silicate and 58.2% for phosphate glasses, respectively. Femtosecond operation has been investigated with both semiconductor saturable absorber mirrors (SESAMs) and a single-walled carbon nanotube SAM (SWCNT-SAM). Furthermore, a detailed comparison of the mode-locking performance with Nd:phosphate and Nd:silicate, employing either one of the SA devices is presented. Although not fully optimized for this particular application yet, SWCNT-SAs yielded sub-100-fs pulses for the first time in Nd:glass. With SESAM mode locking and a single-prism resonator for dispersion compensation, pulse duration as short as 92 fs has been measured, whereas shorter pulses down to 80 fs have been obtained with a two-prism resonator. Tuning range as broad as 30 nm and output power up to 55 mW have also been achieved, confirming the effectiveness of the proposed laser architecture.</P>
Radiation effect on the polymer-based capacitive relative humidity sensors
Shchemerov I.V.,Legotin S.A.,Lagov P.B.,Pavlov Y.S.,Tapero K.I.,Petrov A.S.,Sidelev A.V.,Stolbunov V.S.,Kulevoy T.V.,Letovaltseva M.E.,Murashev V.N.,Konovalov M.P.,Kirilov V.N. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.8
The sensitivity of polymer-based capacitive relative humidity (RH) sensors after irradiation with neutrons, electrons and protons was measured. Degradation consists of the decreasing of the upper RH limit that can be measured. At the same time, low RH-level sensitivity is almost stable. After 30 krad of absorption dose, RH cut off is equal to 85% of max value, after 60 krade40%. Degradation reduces after annealing which indicates high radiation sensitivity of the internal circuit in comparison to RH-sensing polymer film