@article{KalitaSnarskiiZorinetsetal., author = {Kalita, Viktor M. and Snarskii, Andrei A. and Zorinets, Denis and Shamonin (Chamonine), Mikhail}, title = {Single-particle mechanism of magnetostriction in magnetoactive elastomers}, series = {Physical Review E}, volume = {93}, journal = {Physical Review E}, number = {6}, publisher = {American Physical Society}, doi = {10.1103/PhysRevE.93.062503}, abstract = {Magnetoactive elastomers (MAEs) are composite materials comprised of micrometer-sized ferromagnetic particles in a nonmagnetic elastomermatrix. Asingle-particle mechanism ofmagnetostriction in MAEs, assuming the rotation of a soft magnetic, mechanically rigid particle with uniaxial magnetic anisotropy in magnetic fields is identified and considered theoretically within the framework of an alternative model. In this mechanism, the total magnetic anisotropy energy of the filling particles in the matrix is the sum over single particles. Matrix displacements in the vicinity of the particle and the resulting direction of the magnetization vector are calculated. The effect of matrix deformation is pronounced well if the magnetic anisotropy coefficient K is much larger than the shear modulus mu of the elastic matrix. The feasibility of the proposed magnetostriction mechanism in soft magnetoactive elastomers and gels is elucidated. The magnetic-field-induced internal stresses in the matrix lead to effects of magnetodeformation and may increase the elastic moduli of these composite materials.}, language = {en} } @article{StollMayerMonkmanetal., author = {Stoll, Andrea and Mayer, Matthias and Monkman, Gareth J. and Shamonin (Chamonine), Mikhail}, title = {Evaluation of highly compliant magneto-active elastomers with colossal magnetorheological response}, series = {Journal of applied polymer science}, journal = {Journal of applied polymer science}, publisher = {Wiley}, address = {New York, NY}, issn = {1097-4628}, doi = {10.1002/app.39793}, abstract = {Highly compliant elastomers with a shear storage modulus as low as 25 Pa are prepared using commercially available silicone, plasticizer, and tactile mutator silicone additive. They are used as matrix material for magneto-active elastomers (MAEs) with carbonyl iron contents between 0 and 85 wt \%. In the absence of an external magnetic field, the storage modulus of MAEs based on two selected mixtures ranges between ~100 Pa and ~2000 Pa. Addition of a mutator to the matrix mixture results in a long post-cure period depending on the curing temperature and the initial mixture. In the presence of a magnetic field, the presented MAEs exhibit a strong magneto-induced change in storage modulus resulting in a colossal magnetorheological effect of >106 \% which is ~30 times higher than previously reported values. The results are of interest in applications using such elastomers as cell substrates with magnetically tunable rigidity.}, language = {en} } @article{KurzweilShamoninChamonineUdalzow, author = {Kurzweil, Peter and Shamonin (Chamonine), Mikhail and Udalzow, Anton}, title = {Selbstentladung und Leckstromverhalten elektrochemischer Speicher: Impedanzspektroskopie im Langzeitversuch}, series = {Forschungsbericht 2016 / OTH Amberg-Weiden}, journal = {Forschungsbericht 2016 / OTH Amberg-Weiden}, publisher = {Ostbayerische Technische Hochschule Amberg-Weiden}, issn = {2365-1997}, pages = {90 -- 94}, abstract = {Doppelschichtkondensatoren sind elektrochemische Speicher, die innerhalb von Mikrosekunden auf schnelle Last{\"a}nderungen antworten. Auf der Basis einer mehr als zehnj{\"a}hrigen Testerfahrung unserer Arbeitsgruppe sind wir in der Lage, das Alterungsverhalten von Superkondensatoren anhand von Kapazit{\"a}tsverlust, parasit{\"a}ren Nebenreaktionen und der chemischen Analyse von Alterungsprodukten zu quantifizieren. Weitgehend ungekl{\"a}rt sind die elektrochemischen Mechanismen bei der Selbstentladung der Bauteile, die wir nun mithilfe der Impedanzspektroskopie n{\"a}her untersucht haben . Double-layer capacitors are electrochemical storage devices that are able to respond to immediate load changes within some microseconds. Based on more than ten years testing experience of our work group, the aging behaviour of supercapacitors is quantified in terms of capacitance loss, parasitic side reactions, and the chemical analysis of decomposition products. So far, the electrochemical processes during self-discharge have been widely unknown. By the help of impedance spectroscopy, we investigated this item in more detail.}, language = {de} } @inproceedings{ShamoninChamonineDechantFedulovetal., author = {Shamonin (Chamonine), Mikhail and Dechant, Eduard and Fedulov, Feodor and Fetisov, Leonid Y.}, title = {Bandwidth optimization of piezoelectric cantilever beam arrays for harvesting energy from broadband, low-frequency mechanical vibrations}, series = {INTERMATIC 2016, 21.-25.11.2016, Moskau}, volume = {16}, booktitle = {INTERMATIC 2016, 21.-25.11.2016, Moskau}, address = {Moskau}, pages = {187 -- 190}, language = {en} } @inproceedings{KreitmeierSchulzMonkmanetal., author = {Kreitmeier, Florian and Schulz, Irene and Monkman, Gareth J. and Shamonin (Chamonine), Mikhail and Fetisov, Yuri K. and Chashin, Dmitri V. and Fetisov, Leonid Y.}, title = {Observation of Nonlinear Magnetoelectric Response to Magnetic Pulses in Layered Magnetostrictive-Piezoelectric Structures}, publisher = {IEEE}, doi = {10.1109/ISAF.2012.6297739}, abstract = {A detailed experimental study of the magnetoelectric response of planar bi- and symmetric trilayer composite structures to magnetic field pulses is reported. The structures consist of layers of commercially available piezoelectric (lead zirconate titanate) and magnetostrictive (permendur or nickel) materials. The magnetic-field pulses have the form of a half-wave sine function with duration of 450 μs and amplitude from 500 Oe up to 38 kOe. The measurement method is explained and the measured time dependence of the resulting voltage is presented. The most interesting case, when pulse amplitudes are sufficiently large (~ 1-10 kOe) and various types of acoustic oscillation with frequencies much larger than the reciprocal pulse length are excited in the structures, is considered. The dependencies of the magnetoelectric voltage coefficient on the excitation frequency and the applied magnetic field are calculated. By digital signal processing the results are compared with those obtained by the method of harmonic field modulation (HFM). The findings are of interest for developing magnetoelectric sensors for pulsed magnetic fields as well as for rapid characterization of magnetoelectric composite structures.}, language = {en} } @article{NadzharyanShamoninChamonineKramarenko, author = {Nadzharyan, Timur A. and Shamonin (Chamonine), Mikhail and Kramarenko, Elena Yu}, title = {Theoretical Modeling of Magnetoactive Elastomers on Different Scales: A State-of-the-Art Review}, series = {Polymers}, volume = {14}, journal = {Polymers}, number = {19}, publisher = {MDPI}, doi = {10.3390/polym14194096}, pages = {1 -- 42}, abstract = {A review of the latest theoretical advances in the description of magnetomechanical effects and phenomena observed in magnetoactive elastomers (MAEs), i.e., polymer networks filled with magnetic micro- and/or nanoparticles, under the action of external magnetic fields is presented. Theoretical modeling of magnetomechanical coupling is considered on various spatial scales: from the behavior of individual magnetic particles constrained in an elastic medium to the mechanical properties of an MAE sample as a whole. It is demonstrated how theoretical models enable qualitative and quantitative interpretation of experimental results. The limitations and challenges of current approaches are discussed and some information about the most promising lines of research in this area is provided. The review is aimed at specialists involved in the study of not only the magnetomechanical properties of MAEs, but also a wide range of other physical phenomena occurring in magnetic polymer composites in external magnetic fields.}, language = {en} } @article{ShamoninChamonineSnarskiiZhenirovskyy, author = {Shamonin (Chamonine), Mikhail and Snarskii, Andrei A. and Zhenirovskyy, M. I.}, title = {Effective magnetic permeability of ferromagnetic composites. Theoretical description and comparison with experiment}, series = {NDT \& E International}, volume = {37}, journal = {NDT \& E International}, number = {1}, publisher = {Elsevier}, doi = {10.1016/j.ndteint.2003.08.001}, pages = {35 -- 40}, abstract = {Two analytical methods based on the so-called local linearization of magnetostatic properties of composite materials with ferromagnetic inclusions in a non-magnetic matrix are described. These methods are applied to the experimental data obtained in Gorkunov et al. [Russ. J. Nondestruct. Test. 3 (2001) 186]. A qualitative agreement is obtained for the concentration values reported in that paper and a quantitative agreement is achieved at slightly different value of concentration. The conclusions are supported by direct numerical modeling.}, language = {en} } @article{LukyanetsSnarskiiShamoninChamonineetal., author = {Lukyanets, S. and Snarskii, Andrei A. and Shamonin (Chamonine), Mikhail and Bakaev, V. V.}, title = {Calculation of magnetic leakage field from a surface defect in a linear ferromagnetic material: an analytical approach}, series = {NDT \& E International}, volume = {36}, journal = {NDT \& E International}, number = {1}, publisher = {Elsevier}, doi = {10.1016/S0963-8695(02)00071-3}, pages = {51 -- 55}, abstract = {A novel analytical approach for calculating the magnetic leakage field from surface defects is proposed and demonstrated for the case of a linear ferromagnetic material. The novelty of the theory is that it relates the distribution of induced magnetic charges to the surface shape. An excellent agreement between the analytical and numerical results is shown. The functional relations between different magnetic field components are discussed.}, language = {en} } @article{BakaevSnarskiiShamoninChamonine, author = {Bakaev, V. V. and Snarskii, Andrei A. and Shamonin (Chamonine), Mikhail}, title = {The permeability and remanent magnetization of a randomly inhomogeneous two-phase medium}, series = {Technical Physics}, volume = {47}, journal = {Technical Physics}, publisher = {Springer}, doi = {10.1134/1.1435901}, pages = {125 -- 128}, abstract = {A randomly inhomogeneous composite consisting of two, ferromagnetic and nonmagnetic (para-or diamagnetic), phases is considered. The dependence of the effective permeability of the composite on the concentration of the ferromagnetic phase and on the applied magnetic field is found for the case of the negligible hysteresis loop. When the hysteresis loop is appreciable, the remanent magnetization as a function of the ferromagnet concentration is calculated.}, language = {en} } @article{ShamoninChamonineShamoninaKalininetal., author = {Shamonin (Chamonine), Mikhail and Shamonina, Ekaterina and Kalinin, V. and Solymar, L.}, title = {Properties of a metamaterial element: Analytical solutions and numerical simulations for a singly split double ring}, series = {Journal of Applied Physics}, volume = {95}, journal = {Journal of Applied Physics}, number = {7}, publisher = {AIP}, doi = {10.1063/1.1652251}, abstract = {An equivalent circuit, consisting of bulk and distributed elements, is derived for describing the properties of a potential metamaterial element capable of providing negative effective permeability. It is the singly split double ring (SSDR), a special case of the split ring resonator (J. B. Pendry et al., IEEE Trans. Microwave Theory Tech. 47, 2075 (1999)), obtained when the gap capacitance in the inner ring is infinitely large. The variables are the inter-ring voltage and the currents flowing in the inner and outer rings. The excitation is assumed in the form of a spatially constant temporally varying magnetic field. The functions, showing the angular variation of the variables, are found by solving a set of differential equations with boundary conditions imposed at the position of the split. It is shown from the analytical solution that the SSDR can have resonant frequencies in the full spectrum from very low to very high frequencies. It is pointed out in particular that whenever the mean diameter of the ring is equal to an odd multiple of the half wavelength it is always possible to find a set of parameters which will give rise to resonance. As examples the resonant frequencies are determined for eight sets of parameters. Results are also derived by replacing the distributed circuit with a number of discrete circuits. It is finally shown that the results obtained from the equivalent circuit model are in excellent agreement with those derived from the MICRO-STRIPES numerical package which solves Maxwell's equations in the time domain.}, language = {en} }