Optical stimulated transfer from glass state to polar phase in relaxors

The reported study was funded by RFBR according to the research project № 18-02-00675a

Control, Supervisory and Jurisdictional Powers of the Federal Penitentiary Service as a Direction of Administrative and Legal Protection of Russian Penitentiary Institutions

Introduction: the article considers legal regulation of the jurisdictional powers of special structural units of the Federal Penitentiary Service in the process of implementing control and supervisory activities in the territories and facilities of the Russian penal system. Purpose: to present theoretical and legal understanding of the implementation of control and supervisory activities in territories and objects of the Russian penal system. Methods: general scientific methods of cognition (analysis, synthesis, induction and deduction), special methods of legal science (comparative legal and normative-logical), individual private methods of social sciences. Results: the issues of combining of control and supervisory functions in the activities of special structural units of the Federal Penitentiary Service are studied, and their role as one of the main directions of administrative and legal protection of objects of the Russian penal system is indicated. The problems of legal regulation and practice of implementation of jurisdictional powers by the subjects of control and supervisory activity applicable to the sphere of execution of criminal penalties are analyzed. Conclusion: proposals regarding regulation of administrative and jurisdictional powers of special structural units of the Federal Penitentiary Service are formulated. The following characteristics of control and supervisory activities of the penal system are identified: it is carried out taking into account the specifics of the sphere of public relations in which it is implemented; it combines elements of control and supervision; it has a complex nature of action; it is carried out by specially authorized structural units of the Federal Penitentiary Service; supervisory activity is implemented within the framework of the external activities of authorized subjects of the Federal Penitentiary Service, while the control is of an intra-system (intra-departmental) nature; it is the most important form of the implementation of administrative and jurisdictional activities in the sphere of public relations under consideration

Giant Dielectric Permittivity and Magnetocapacitance in La\u3csub\u3e0.875\u3c/sub\u3eSr\u3csub\u3e0.125\u3c/sub\u3eMnO\u3csub\u3e3\u3c/sub\u3e Single Crystals

We report the observation of extremely high dielectric permittivity exceeding 109 and magnetocapacitance of the order of 104% in La0.875Sr0.125MnO3 single crystal. This phenomenon is observed below 270 K, and it exhibits a history dependence. These effects may be the consequence of strong competition and interplay among the charge, orbital, and spin degrees of freedom, resulting in nanoscale charge and spin dynamic inhomogeneities in the prepercolation regime of the phase segregation

The delay time of phase transition to the polar phase in relaxors: influence of ultraviolet illumination

The reported study was partially supported by RFBR, research project No. 18-02-00675a

Charge localization in the model of relaxor ferroelectrics

Phenomenological approach to a relaxor theory is developed and some experimental results in the support of this theory are received. The optical absorption spectrum, luminescent emission and photoconductivity are investigated in the wide temperature region in PbMg 1/3 Nb 2/3 O 3 . On the basis of this data the density of states on the impurity band and the velocity of charge carrier localization are found. The probability distribution of relaxation time, g (ln(τ)) d ln(τ), is found analytically as the function of the density of states in the impurity polaron band. The temperature dependences of dielectric response of relaxor ferroelectrics are described in the framework of the Landau-Ginzburg-Devonshire theory of phase transitions. We show that an additional condition for the relaxor behavior to appear is the coincidence of the phase transition temperature with the temperature region of thermo-localization of charges on the defects. The properties of local centers and polaron localization dynamics are studied

Optical properties and model of relaxor ferroelectrics

Phenomenological approach to a relaxor theory is developed and some experi-mental results in the support of this theory are received. The optical absorption spectrum, luminescent emission and photoconductivity are investigated in the wide temperature region in PbMg 1/3 Nb 2/3 O 3 . On the basis of this data the density of states on the impurity band and the velocity of charge carrier localization are found. The probability distribution of relaxation time, g (ln( τ))d ln( τ ), is found analytically as the function of the density of states in the impurity polaron band. The temperature dependences of dielectric response of relaxor ferroelectrics are described in the framework of the Landau-Ginzburg-Devonshire theory of phase transitions. The properties of local centers and polaron localization dynamics are studied

表紙、裏表紙、奥付、学会消息、執筆者紹介、投稿規程

The optical absorption spectrum, luminescent emission and photoconductivity were investigated in single crystal PbMg1/3Nb2/3O3 and in the Pb0.91La0.09(Zr0.65Ti0.35)O3 ceramics in the wide temperature region. The spectrum of the luminescence correlates with spectrum of photoconductivity emission. The position of the maximum of the luminescence emission indicates the origin of the charge carriers for the emissions from the defect centers. On the basis of these data the properties of the local centers were found, and phenomenological approach to a relaxor theory is discussed

Photoconductivity and photostimulated currency in PMN-PT

© 2017 Taylor & Francis Group, LLC.The photoconductivity and the photostimulated currency were measured in PMN-PT single crystals. Based on the experimental data, the characteristics of the density of states of the defect levels and the possibility of their participation in the formation of a diffuse phase transition are discussed

Optical properties of relaxor ferroelectrics

The optical absorption spectrum, luminescent emission and photoconductivity were investigated in single crystal PbMg1/3Nb2/3O3 and in the Pb0.91La0.09(Zr0.65Ti0.35)O3 ceramics in the wide temperature region. The spectrum of the luminescence correlates with spectrum of photoconductivity emission. The position of the maximum of the luminescence emission indicates the origin of the charge carriers for the emissions from the defect centers. On the basis of these data the properties of the local centers were found, and phenomenological approach to a relaxor theory is discussed