Fyzikální ústav Akademie věd ČR

Semináře

Charged domain walls in BaTiO3 single-crystals

Út, 20/10/2015 - 10:00 - 11:00

Dr. P. Bednyakov (École Polytechnique Fédérale de Lausanne, Switzerland)

Recently observed properties of charged ferroelectric domain walls (CDWs) make these structures promising for application in future electronics. It was demonstrated experimentally that the quasi two-dimensional electron gas is present at head-to-head CDWs [1]. The CDWs are therefore good conductors that can be moved by an external electric field. As suggested by theory [2] and experiment [3] CDWs with very low spacing may cause the enhancement of piezoelectric and dielectric properties. However, the problem of controlled regular growth and formation of CDWs is not well understood.

Více >>

In silico studies of electronic current in nano-junctions: Exciting atomic motion

Čt, 22/10/2015 - 15:00 - 16:00

Mads Brandbyge (Department of micro and nanotechnology & Center for Nanostructured Graphene (CNG), Technical University of Denmark (DTU), Denmark)

In the Landauer approach to nanoscale transport the electrons are assumed to bypass a conducting junction ballistically and equilibrate through energy exchange in the electrodes.

Více >>

Interplay of charge, spin and thermal imbalances in normal-metal/ferromagnet bilayers

Pá, 23/10/2015 - 10:00 - 11:00

Can Onur Avci (ETH Zurich)

Recent demonstrations of magnetization switching driven by current-induced spin-orbit torques (SOTs) have drawn considerable attention in the field of spintronics. The SOTs are associated with the spin Hall and interfacial effects, and have been found to occur in a variety of normal-metal/ferromagnet systems. In this talk I will present harmonic transverse (Hall) and longitudinal (magnetoresistance) measurements on a variety of normal-metal/ferromagnet systems with a special focus on Pt/Co, Ta/Co layers with in-plane magnetization. I will discuss a new magnetoresistance effect (unidirectional spin Hall magnetoresistance) that we have recently discovered.

Více >>

Manipulation of magnetization by spin-orbit torques

Pá, 23/10/2015 - 14:00 - 15:00

Kevin Garello (ETH Zurich)

Recent demonstrations of perpendicular magnetization switching induced by in-plane current injection in ferromagnetic heterostructures have drawn attention to a class of spin torques based on orbital-to-spin momentum transfer (SOTs).
After describing the main spin-orbit interactions observed in ferromagnetic heterostructures and some of our latest measurements, I will present their straightforward impact on magnetic memory technologies.

Více >>

Minulé semináře
Dr. Simone Babuin, Dr. Tymofiy Chagovets, Dr. Zdeněk Janů Aktuální výsledky Společné laboratoře nízkých teplot - pracovní seminář odd. 11 23.04.2013 14:00
Dr. Ing. Klaus Kuhnen An Operator Calculus for Modeling and Compensation of Complex Memory Nonlinearities in Smart Material Systems 23.04.2013 10:00
M. Etzkorn Following dynamics at the atomic scale: The relaxation of a spin measured by time resolved STM 19.04.2013 14:00
Miroslav Veverka Magnetické ferity ve službách lékařských věd – kobaltnato-zinečnatý ferit 18.04.2013 14:00
Michal Šumbera Aktivity skupiny ultrarelativistických těžkých iontů ÚJF AV ČR v experimentech ALICE a STAR 18.04.2013 14:00
Carmen S. Menoni Discovering the nano-world with bright laser beams of extreme ultraviolet light 17.04.2013 15:00
Alexander Shick Electronic structure and magnetic properties of selected transuranium compounds 16.04.2013 15:00
Volodymyr Skoromets a Václav Janovec Tunability of materials and structures for THz spectral range; Dvojčata, domény, hybridní struktury 16.04.2013 10:00
Ing. Martin Smrž, Ph.D. Speciální druhy laserů – optické parametrické generátory, ramanovské lasery 15.04.2013 09:30
Ing. Michal Nevrkla RTG záření: Detekce a aplikace 12.04.2013 13:05
J. Kaštil Magnetic properties and magnetocaloric effect of Co substituted Mn rich Ni2MnGa 11.04.2013 14:00
Šárka Todorova Hadronizace a lundský fragmentační model 11.04.2013 14:00
Dr. Jan Honolka Surface and material science perspectives of the new NanoESCA Lab 10.04.2013 15:00
Pavel Augustinský Improved Measurement of Green's Function in Hybridization Expansion Continuous Time Quantum Monte Carlo. 09.04.2013 15:00
Pavel Márton A brief excursion to the ferroelectric-domain-wall interior 09.04.2013 10:00
Ing. Filip Šroubek, Ph.D. Blind Deconvolution in Image Processing 09.04.2013 10:00
Ing. Martin Smrž, Ph.D. Generování nanosekundových a pikosekundových laserových pulsů. Přeladitelné lasery 08.04.2013 09:30
Laserový den na UHK 08.04.2013 09:00
Sergej Moroz Super Efimov effect 04.04.2013 11:00
Dr. Yong-Ho CHA High-power slab and fiber lasers at KAERI 29.03.2013 10:00
Fumitaka Ohashi Clathrates with group IV materials: novel photo-absorption materials for solar cells 28.03.2013 15:00
J. Kamarád Magneto-kalorické jevy v amorfních a krystalických slitinách 3-d prvků (přímá měření) 28.03.2013 14:00
Xavier Marti Antiferromagnetic semiconductor spintronics 27.03.2013 10:00
Ondřej Kaman Komplexní magnetické nanočástice s monodisperzními jádry a hybridními obaly 21.03.2013 14:00
Prof. Laurent Baulieu Minimizing gauge-functional for 2-d gravity and string theory 14.03.2013 15:00
Takatoshi Yamada Microscopic C-AFM/KPFM/Raman characterization of thermal and plasma CVD graphene 11.03.2013 15:30
Nava Setter Ferroelectric nano-wires 07.03.2013 15:00
Hiroki Tsuchiura Coercivity mechanism of Nd-Fe-B sintered magnets 07.03.2013 14:00
Takeshi Tayagaki Toward highly efficient Si solar cells using Ge/Si heterostructures 01.03.2013 13:00
Kirill Svit, PhD. student Formation and tunneling spectroscopy of CdS QDs obtained by Langmuir-Blodgett method 01.03.2013 10:00

Copyright © 2008-2014, Fyzikální ústav AV ČR, v. v. i.