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Article
Open AccessReal-space observation of ferroelectrically induced magnetic spin crystal in SrRuO3
Unusual features in the Hall Resistivity of thin film systems are frequently associated with whirling spin textures such as Skyrmions. A host of recent investigations of Hall Hysteresis loops in SrRuO3 heterostru...
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Article
Open AccessUltrafast current imaging by Bayesian inversion
Spectroscopic measurements of current–voltage curves in scanning probe microscopy is the earliest and one of the most common methods for characterizing local energy-dependent electronic properties, providing i...
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Article
Open AccessDomain wall motion in Pb(Zr0.20Ti0.80)O3 epitaxial thin films
Two Pb(Zr0.20Ti0.80)O3 samples of different thickness and domain configuration have been studied. The c-domain sample was found to have a higher coercive field E c ...
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Article
Reversible electrical switching of spin polarization in multiferroic tunnel junctions
Magnetic tunnel junctions play an important role in controlling electron spin in spintronic devices. The reversible, remanent switching of electron-spin polarization in multiferroic tunnel junctions now enable...
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Article
A photoferroelectric material is more than the sum of its parts
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Article
Transfer and handling of thin semiconductor materials by a combination of wafer bonding and controlled crack propagation
Direct waferbonding is an appropriate technology to join two or more wafers of the same or of different materials. Waferbonding can be used to stiffen thin wafers during fabrication. However, conventional fabr...
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Article
Initial Growth Stages of Epitaxial BaTiO3 Films on Vicinal SrTiO3:Nb (001) Substrates
The growth mechanism of epitaxial BaTiO3 films on vicinal Nb-doped SrTiO3 (SrTiO3:Nb) (001) substrate surfaces was studied in terms of surface morphology, crystalline orientation, microstructure, and film/substra...
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Article
Structural Quality And Electrical Behavior Of Epitaxial High-κ Y2O3 / Si(001)
Y2O3 thin films were grown directly on Si (001) by MBE and annealed in-situ under UHV at various annealing temperatures. The samples were investigated in-situ by RHEED and ex-situ by HRTEM. A 7 to 15 Å thick non-...
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Article
Optical properties of epitaxial BiFeO3 thin films
Optical properties of epitaxial BiFeO3 thin films grown via pulsed-laser deposition on (110) DyScO3 substrates have been investigated. Their near-normal spectroscopic reflectivity was measured in the spectral ran...
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Article
Open AccessStructural defects and local chemistry across ferroelectric–electrode interfaces in epitaxial heterostructures
We present a detailed investigation of the chemistry at the growth interface between the bottom electrode and ferroelectric film in (001)-oriented epitaxial ferroelectric thin-film heterostructures. Three diff...
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Article
Open AccessFabrication of epitaxial nanostructured ferroelectrics and investigation of their domain structures
Nanostructured ferroelectrics are important objects for studies on ferroelectric size effects as well as for applications to memory devices with ultra-high memory density. In the present article, we introduce ...
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Article
Open AccessInfluence of long-range dipolar interactions on the phase stability and hysteresis shapes of ferroelectric and antiferroelectric multilayers
Phase transition and field driven hysteresis evolution of a two-dimensional Ising grid consisting of ferroelectric–antiferroelectric multilayers that take into account the long range dipolar interactions were ...
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Article
Open AccessUltrafast structural dynamics of perovskite superlattices
Femtosecond x-ray diffraction provides direct insight into the ultrafast reversible lattice dynamics of materials with a perovskite structure. Superlattice (SL) structures consisting of a sequence of nanometer...
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Chapter and Conference Paper
Ultrafast Structural Dynamics of Polar Solids Studied by Femtosecond X-Ray Diffraction
We discuss recent progress in ultrafast x-ray diffraction, addressing photoinduced structural dynamics in ferroelectric superlattices and polar molecular crystals. Elongations of coupled phonon modes affecting...
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Chapter and Conference Paper
Femtosecond X-ray Diffraction Study of the Ultrafast Coupling between Magnetization and Structure in the Ferromagnet SrRuO3
Femtosecond optical excitation of magnetically ordered SrRuO3 nanolayers leads to an ultrafast demagnetization and a concomitant magnetoelastic contractive stress. The resulting ultrafast structural response of t...
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Chapter and Conference Paper
Diffraction contrast imaging and high resolution transmission electron microscopy of multiferroic thin films and heterostructures
Multiferroic materials exhibit simultaneous ferroelectric and ferromagnetic properties and are extensively studied because of their potential applications in multifunctional devices as well as for the understa...
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Chapter and Conference Paper
Ferroelectric materials and structures suitable for data storage: The role of microscopies in establishing preparation-microstructure-property relations
Among the various possible routes towards solid-state non-volatile random access memories (NV-RAMs) of high memory density, ferroelectric random access memories (FRAMs) offer very good prospects. Non-volatilit...
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Article
Accurate time delay determination for femtosecond X-ray diffraction experiments
We report on a versatile and accurate method for determining the time delay between femtosecond X-ray and optical pulses in an optical pump/X-ray diffraction probe experiment. Upon excitation with moderate pum...
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Chapter and Conference Paper
Probing strain propagation in nanolayered perovskites by diffraction of femtosecond x-rays
Propagating strain waves in SrTiO3, launched from PbZr0.2Ti0.8O3 films are measured by time-resolved x-ray diffraction. X-ray interference among contributions from differently strained regions allow to determine ...
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Article
Electrical behavior of size-controlled Si nanocrystals arranged as single layers
A metal–oxide–semiconductor structure containing a single layer of size-controlled silicon nanocrystals embedded into gate oxide was fabricated. Size control for the silicon nanocrystals was realized by using ...
