394 research outputs found
Tailoring palladium nanocontacts by electromigration
Electromigration is employed in nanoelectronics for transforming narrow metallic wires into electrodes separated by a few nanometers gap. In this work, we fabricate either nanoconstrictions or nanogap electrodes by performing electromigration in palladium nanowires. The device resistance and the cross section of the initial nanowires allow us to regulate the conditions for transforming deterministically each nanowire in a specific final device. The resulting samples show unique electrical transport characteristics and could be used in multiple nanoelectronics research applications, from ballistic transport to electrodes for single molecular devices.Fil: Arzubiaga, Libe. CIC nanoGUNE; EspañaFil: Golmar, Federico. Instituto Nacional de Tecnología Industrial; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Llopis, Roger. CIC nanoGUNE; EspañaFil: Casanova, Félix. CIC nanoGUNE; España. Basque Foundation for Science; EspañaFil: Hueso, Luis E.. CIC nanoGUNE; España. Basque Foundation for Science; Españ
Продовольственная безопасность - обязательное условие устойчивого развития страны
В работе дается краткое описание проблеме продовольственной безопасности. Предлагается механизм, позволяющий на практике улучшить структуру питания населения, при этом увеличить производство отечественных продуктов функционального и специализированного назначения.The paper gives a brief description of the problem of food security. A mechanism is proposed that allows in practice to improve the structure of the population's nutrition, while increasing the production of domestic functional and specialized products
Profile of the liquid film wetting a channel
International audienceWe have developed a simple optical technique to investigate the characteristics of liquid films wetting solid surfaces. To validate this technique, we have studied the wetting film that separates a train of lamellas moving through a channel. Total reflection of the laser beam on the wetting film/air interface is used to extract the profile and the thickness of the wetting film. For quasistatic movement of lamellas, we show that the thickness is well described by a capillary number power law
How reliable are Hanle measurements in metals in a three-terminal geometry?
We test the validity of Hanle measurements in three-terminal devices by using
aluminum (Al) and gold (Au). The obtained Hanle and inverted Hanle-like curves
show an anomalous behavior. First, we measure Hanle signals 8 orders of
magnitude larger than those predicted by standard theory. Second, the
temperature and voltage dependences of the signal do not match with the
tunneling spin polarization of the ferromagnetic contact. Finally, the spin
relaxation times obtained with this method are independent of the choice of the
metallic channel. These results are not compatible with spin accumulation in
the metal. Furthermore, a scaling of the Hanle signal with the interface
resistance of the devices suggests that the measured signal is originated in
the tunnel junction.Comment: 9 pages, 5 figure
Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects
We report magnetoresistance measurements on thin Pt bars grown on epitaxial
(001) and (111) CoFe2O4 (CFO) ferrimagnetic insulating films. The results can
be described in terms of the recently discovered spin Hall magnetoresistance
(SMR). The magnitude of the SMR depends on the interface preparation
conditions, being optimal when Pt/CFO samples are prepared in situ, in a single
process. The spin-mixing interface conductance, the key parameter governing SMR
and other relevant spin-dependent phenomena such as spin pumping or spin
Seebeck effect, is found to be different depending on the crystallographic
orientation of CFO, highlighting the role of the composition and density of
magnetic ions at the interface on spin mixing.Comment: 13 pages, 5 figure
Совершенствование системы управления предприятием
Рассмотрены общие организационные основы деятельности предприятия МУП "Пламя". Представлен анализ деятельности предприятия за 2015 – 2017 гг. МУП "Пламя".
Дана оценка результатов проведенного анализа исследуемого предприятия, разработаны мероприятия по совершенствованию деятельности предприятия.The General organizational bases of activity of the MUP "Plamya" enterprise are considered. The analysis of the enterprise activity for 2015 – 2017 of MUP "Plamya"is presented.
The evaluation of the results of the analysis of the studied enterprise is given, measures to improve the activities of the enterprise are developed
Room-temperature air-stable spin transport in bathocuproine-based spin valves
Organic semiconductors, characterized by weak spin-scattering mechanisms, are attractive materials for those spintronic applications in which the spin information needs to be retained for long times. Prototypical spin-valve devices employing organic interlayers sandwiched between ferromagnetic materials possess a figure of merit (magnetoresistance (MR)) comparable to their fully inorganic counterparts. However, these results are a matter of debate as the conductivity of the devices does not show the expected temperature dependence. Here we show spin valves with an interlayer of bathocuproine in which the transport takes place unambiguously through the organic layer and where the electron spin coherence is maintained over large distances (>60 nm) at room temperature. Additionally, the devices show excellent air stability, with MR values almost unaltered after 70 days of storage under ambient conditions, making bathocuproine an interesting material for future spintronic applications.Fil: Sun, Xiangnan. CIC nanoGUNE; EspañaFil: Gobbi, Marco. Université de Strasbourg; Francia. CIC nanoGUNE; EspañaFil: Bedoya Pinto, Amilcar. CIC nanoGUNE; EspañaFil: Txoperena, Oihana. CIC nanoGUNE; EspañaFil: Golmar, Federico. CIC nanoGUNE; España. Instituto Nacional de Tecnología Industrial; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Llopis, Roger. CIC nanoGUNE; EspañaFil: Chuvilin, Andrey. CIC nanoGUNE; España. Fundación Vasca para la Ciencia; EspañaFil: Casanova, Félix. CIC nanoGUNE; España. Fundación Vasca para la Ciencia; EspañaFil: Hueso, Luis E.. CIC nanoGUNE; España. Fundación Vasca para la Ciencia; Españ
Multiorgan retrieval and preservation of the thoracic and abdominal organs in Maastricht III donors
This editorial describes the indications and technical aspects of the simultaneous retrieval of thoracic and abdominal organs in Maastricht III donors as well as the preservation of such organs until their implantation.©The Author(s) 202
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