160 research outputs found
Critical Current Oscillations in Strong Ferromagnetic Pi-Junctions
We report magnetic and electrical measurements of Nb Josephson junctions with
strongly ferromagnetic barriers of Co, Ni and Ni80Fe20 (Py). All these
materials show multiple oscillations of critical current with barrier thickness
implying repeated 0-pi phase-transitions in the superconducting order
parameter. We show in particular that the Co barrier devices can be accurately
modelled using existing clean limit theories and so that, despite the high
exchange energy (309 meV), the large IcRN value in the pi-state means Co
barriers are ideally suited to the practical development of superconducting
pi-shift devices.Comment: 4 pages 3 figures 1 table. Revised version as accepted for
publication. To appear in Physical Review Letter
Incentives for independent anti-corruption experts of normative legal acts and their projects
The article is devoted to the problem of incentives for independent anti-corruption experts conducting examination of normative legal acts and their project
Regulamento legal internacional de gestão ambiental
The article provides an overview of the main international documents regulating environmental management measures. Identified three areas of modern international legal regulation of rational economic environmental management. Especially analyzed the fundamental principle in this area - the use of the best available technology. The conclusion is made about the feasibility of developing a single universal international treaty on the issues under consideration.El artículo proporciona una visión general de los principales protocolos internacionales de gestión de la gestión de la gestión. Identificados tres áreas de la modernización de la legislación internacional de regulación de la racionalización de los sistemas de gestión. En particular, el principio fundamental de este ámbito es el uso de la tecnología más avanzada. La conclusión se ha hecho sobre la viabilidad de la actuación a un único universal internacional tratada sobre los temas en cuestión.O artigo fornece uma visão geral dos principais documentos internacionais que regulam as medidas de gestão ambiental. Identificou três áreas de regulação legal internacional moderna de gestão ambiental econômica racional. Especialmente analisado o princípio fundamental nesta área - o uso da melhor tecnologia disponível. A conclusão é feita sobre a viabilidade do desenvolvimento de um tratado universal universal sobre as questões em consideração
International legal regulation of environmental management
The article provides an overview of the main international documents regulating environmental management measures. Identified three areas of modern international legal regulation of rational economic environmental manageme
Право человека на охрану здоровья - международно-правовой аспект ВИЧ/СПИД и права человека
Гусакова А. С. Право человека на охрану здоровья - международно-правовой аспект ВИЧ/СПИД и права человека / А. С. Гусакова // Міжнародні читання з міжнародного права пам’яті професора П.Є. Казанського : матер. третьої міжнар. наук. конф. (м. Одеса, 2–3 листопада 2012 р.) / відп. за випуск М. І. Пашковський ; НУ «ОЮА». – Одеса : Фенікс, 2012. – С. 250-252.Автор статьи считает, что во многих странах нарушениям прав человека, связанных с ВИЧ-статусом, не уделяется надлежащее внимание. Именно из-за
этого чувствительность к инфекции и дальше порождается социальным, экономическим и гендерным неравенством.
Если права человека не уважают, не защищают и не гарантируют, увеличивается риск инфицирования ВИЧ, а ВИЧ-инфицированные страдают от дискриминации, что наиболее часто мешает борьбе против эпидемии
Properties of tunnel Josephson junctions with a ferromagnetic interlayer
We investigate superconductor/insulator/ferromagnet/superconductor (SIFS)
tunnel Josephson junctions in the dirty limit, using the quasiclassical theory.
We formulate a quantitative model describing the oscillations of critical
current as a function of thickness of the ferromagnetic layer and use this
model to fit recent experimental data. We also calculate quantitatively the
density of states (DOS) in this type of junctions and compare DOS oscillations
with those of the critical current.Comment: 9 pages, 8 figures, to be published in Phys. Rev.
Density of states in SF bilayers with arbitrary strength of magnetic scattering
We developed the self-consistent method for the calculation of the density of
states in the SF bilayers. It based on the quasi-classical Usadel
equations and takes into account the suppression of superconductivity in the S
layer due to the proximity effect with the F metal, as well as existing
mechanisms of the spin dependent electron scattering. We demonstrate that the
increase of the spin orbit or spin flip electron scattering rates results in
completely different transformations of at the free F layer
interface. The developed formalism has been applied for the interpretation of
the available experimental data.Comment: 5 pages, 8 figure
Scattering by magnetic and spin-orbit impurities and the Josephson current in superconductor-ferromagnet-superconductor junctions
We analyze the Josephson current in a junction consisting of two
superconductors (S) and a ferromagnetic layer (F) for arbitrary impurity
concentration. In addition to non-magnetic impurities, we consider also
magnetic ones and spin-orbit scattering. In the limit of weak proximity effect
we solve the linearized Eilenberger equation and derive an analytical
expression for the Josephson critical current valid in a broad range of
parameters. This expression enables us to obtain not only known results in the
dirty and clean limits but also in a intermediate region of the impurity
concentration, which may be very important for comparison with experimental
data.Comment: revised versio
Physiological role of chemical elements
МЕТОДИЧЕСКИЕ РЕКОМЕНДАЦИИХИМИЯФИЗИОЛОГИЯХИМИЧЕСКИЕ ЭЛЕМЕНТЫСТОМАТОЛОГИЯИНОСТРАННЫЕ СТУДЕНТЫХИМИЯ ОБЩАЯИздание составлено в соответствии с учебной программой по общей химии. Предназначено для иностранных студентов
Finite Element Modeling of Charge and Spin-currents in Magnetoresistive Pillars with Current Crowding Effects
The charge and spin diffusion equations taking into account spin-flip and
spin-transfer torque were numerically solved using a finite element method in
complex non-collinear geometry. This approach was used to study the
spin-dependent transport in giant magnetoresistance metallic pillars sandwiched
between extended electrodes as in magnetoresistive heads for hard disk drives.
The charge current crowding around the boundaries between the electrodes and
the pillar has a quite significant influence on the spin current.Comment: 11 pages, 4 figure
- …