Fyzikální ústav Akademie věd ČR

Semináře

Charged domain walls in BaTiO3 single-crystals

Úterý, 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.

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

Čtvrtek, 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.

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

Pátek, 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.

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Manipulation of magnetization by spin-orbit torques

Pátek, 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.

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Minulé semináře
Petříček, Dušek, Palatinus First ad hoc workshop on Jana2006 07.12.2009 09:00
Timo Jacob (Institut für Elektrochemie, Universität Ulm,Germany) Fundamentals of the Oxygen Reduction Reaction 27.11.2009 10:30
Pavel Bakule Material studies with spin polarized muons as magnetic microprobes 24.11.2009 10:00
Wolfgang Braun In situ synchtrotron x-ray diffraction analysis of molecular beam epitaxy growth 30.10.2009 10:00
Vilgelmina Stepkova Second Quantization of Mixed States of Luminophore Molecule and Small metal particle 27.10.2009 10:00
Wojciech Kuczynski Behaviour of helical structure in some chiral smectic C* liquid crystals 15.10.2009 10:00
Martin Žonda Phase transitions in the three-dimensional Falicov-Kimball model 29.09.2009 15:00
Simonas Grecius Simultaneous permittivity and permeability measurements of multiferroics using coaxial line techniques 22.09.2009 10:00
Dr. Dieter van den Bleeken, Rutgers Univ. (USA) Counting multicenter BPS states in N=2 supergravity 14.09.2009 14:30
Patrick Bruno, European Synchrotron Radiation Facility, Grenoble, France Exchange interactions in magnetic systems: From bulk through multilayers to nanostructures (Mach Medal Lecture) 09.09.2009 15:00
Ausrine Bartasyte Raman spectroscopy and X-ray diffraction studies of oxide thin films 23.07.2009 10:00
Samuel Margueron Raman spectroscopy of GaN quantum dots and GaN/sapphire circular pillars 21.07.2009 10:00
Nina Podoliak Theoretical modelling of ferromagnetic nanomaterials based on liquid crystals 04.06.2009 10:00
Jean-François Legrand Onset of the -relaxation in LiCl-6H2O by Brillouin scattering techniques 07.05.2009 10:00
Marina Tyunina Relaxor Ferroelectric Thin Films 05.05.2009 10:00
Paweł Perkowski The analysis of methods for elimination of high frequency dielectric losses in ITO cells 30.04.2009 10:00
Hiroko Yokota Polar state and critical behavior in quantum relaxor Li doped KTaO3 17.04.2009 09:00
Yoshiaki Uesu Peculiar physical properties of ferroelectric superlattice thin films 16.04.2009 15:00
Lubor Lejček Pozoruhodný svět topologických poruch 17.03.2009 10:00
Databáze minulých seminářů (1995-2009) 01.01.2008 00:03

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