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1.
Kalyakin L. A. Zvezdin A. K. Gareeva Z. V. 《Theoretical and Mathematical Physics》2020,203(1):457-468
Theoretical and Mathematical Physics - We consider a system of nonlinear autonomous differential equations that describe the orientation of the antiferromagnetic vector in a multiferroic film and... 相似文献
2.
Gareeva Z. V. Zvezdin A. K. Shul’ga N. V. Gareev T. T. Chen S. M. 《Physics of the Solid State》2022,64(5):248-254
Physics of the Solid State - Magnetoelectric effects in multiferroics with a perovskite structure, such as bismuth ferrite, rare-earth orthochromites, and Ruddlesden–Popper structures... 相似文献
3.
R. M. Vakhitov E. R. Gareeva M. M. Vakhitova A. R. Yumaguzin 《Physics of the Solid State》2009,51(9):1859-1865
The magnetization and magnetization reversal processes that occur through the mechanism of incoherent rotation of magnetic
moments in cubic ferromagnets with limited sizes are investigated theoretically. It is established that the appropriate model
representation of magnetic inhomogeneities arising in the region of defects is provided by 0° domain walls. The influence
of the external magnetic field on the structure and the stability region of the 0° domain walls is determined. This makes
it possible to reveal the characteristic features of the magnetization reversal of real crystals as a function of the material
and defect parameters, in particular, in the vicinity of the spin-reorientation phase transition. 相似文献
4.
S. O. Alexeyev K. A. Rannu D. V. Gareeva 《Journal of Experimental and Theoretical Physics》2011,113(4):628-636
The energy flux emitted during the accretion of matter onto a wormhole in the Brans-Dicke theory has been calculated. This
characteristic is compared with its values calculated previously for wormholes in general relativity and for a Schwarzschild
black hole. 相似文献
5.
The electrosurface properties of nanoporous agglomerates of detonation nanodiamond (DND) particles purified from acidic impurities by dialysis are comprehensively investigated. Acid-base potentiometric titration, laser Doppler electrophoresis, and conductometry are employed to measure the adsorption isotherms $\Gamma _{H^ + } (pH)$ and $\Gamma _{OH^ - } (pH)$ of potential-determining ions, as well as the dependences of surface charge density ??0, electrophoretic mobility u e, and specific conductivity K p of the agglomerates on the pH = 3.5?C10.5 of aqueous 0.0001?C0.1 M KCl solutions. The obtained adsorption isotherms indicate heterogeneity of the DND surface, i.e., the presence of different proton-donor and proton-acceptor surface functional groups. Computer simulation of the adsorption isotherms is carried out for a DND surface containing two types of functional groups, namely, acidic carboxyl (-COOH) and amphoteric hydroxyl (-COH) groups, the predominant content of which is confirmed by FTIR spectroscopy data. The optimal values are determined for the reaction constants of ionization of these groups. It is revealed that the effective conductivity of the porous agglomerates is one or two orders of magnitude higher than the conductivity of equilibrium solutions. Corresponding values of electrokinetic potential ?? are calculated as functions of pH and KCl concentration from the electrophoretic mobility of the agglomerates using different equations of electrophoresis theory. It is shown that use of the Miller formula, which takes into account the electromigration fluxes of ions and electroosmotic flows of solutions in pores of dispersed particles, yields more correct ?? potential values for DND agglomerates. 相似文献
6.
Z.V. Gareeva R.A. Doroshenko K. Harbusch 《Journal of magnetism and magnetic materials》2009,321(9):1163-1166
Electric polarization arising in a vicinity of magnetic inhomogenety in longitudinally magnetized ferromagnetic films has been considered. A variety of polarization transformations induced by external magnetic field have been studied. It has been demonstrated that electric polarization can change continuously or with a jump-like character depending on intrinsic, mainly anisotropic properties of the layers, the direction and the value of external magnetic field. 相似文献
7.
8.
G. Yu. Ishmuratov M. P. Yakovleva V. A. Ganieva G. R. Gareeva R. R. Muslukhov G. A. Tolstikov 《Chemistry of Natural Compounds》2005,41(5):549-551
Synthesis of optically pure 3R-methylcyclopentan-1-one using in the key step Dieckmann cyclization of diisopropyl 3R-methylhexan-1,6-dioate,
which is accessible from L-(-)-menthol, was proposed.
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Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 448–450, September–October, 2005. 相似文献
9.
O. V. Anikin L. G. Gareeva I. E. Chlenov V. A. Tartakovskii Yu. T. Struchkov V. S. Kuz'min Yu. N. Burtsev 《Russian Chemical Bulletin》1989,38(8):1659-1663
N,N-dinitrosulfodiamides are formed in the nitration of sulfodiamides with concentrated nitric acid or nitronium borofluoride, and also on substitutional nitration of the corresponding N,N-di-tert.-butyl derivatives with those reagents. Sulfuryl chloride reacts with the disodium salt of ethylene N,N-dinitramine to produce 2,5-dinitro-1,2,5-thiadiazolidine-1,1-dioxide. The corresponding N-nitrosulfamides are formed when nitramine salts react with methane sulfochloride.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1812–1815, August, 1989. 相似文献
10.
Interplay between elasticity,ferroelectricity and magnetism at the domain walls of bismuth ferrite 下载免费PDF全文
Multiferroic domain walls have recently been proposed as the active element in devices related to spintronics, data storage, and magnetic logic. Among multiferroics, BiFeO3 is by far the most studied material. Its domain walls have shown rich behaviours that include conductivity in an otherwise insulating crystal, and magnetotransport properties that are markedly different from those of the bulk. In this article we summarize the experimental evidence and the current models used to understand the interplay between elastic, electric, and magnetic properties of the domain walls. Starting from the considera‐ tion of antiferromagnetic domain structures on a background of ferroelectric domains, and emphasizing pinning effects, we proceed to discuss the microscopic behavior of ferroelectricity and magnetism at the walls. We describe how domain organization in BiFeO3 is caused by structural transformations, and scrutinize modelling works pinpointing their characteristic features. Finally, we summarize the recent progress and list open questions for future study on BiFeO3 domain structures. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) 相似文献