A5070183567- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Dielectric properties of ceramics
- Electronic and Structural Properties of Oxides
- Perovskite Materials and Applications
- Acoustic Wave Resonator Technologies
- Nanomaterials and Printing Technologies
- Iron-based superconductors research
- Electrowetting and Microfluidic Technologies
- Photonic Crystals and Applications
- Magnetic and transport properties of perovskites and related materials
- Advanced Sensor and Energy Harvesting Materials
Martin Luther University Halle-Wittenberg
2017-2022
Innovationszentrum für Mobilität und Gesellschaftlichen Wandel (Germany)
2020
Abstract Multiferroic bismuth ferrite, BiFeO 3 , offers a vast landscape to study the interplay between different ferrroic orders. Another aspect which is equally exciting, and yet underutilized, possibility of large-scale ordering domains. Along with symmetry-driven bulk photovoltaic effect, presents opportunities conceptualize novel light-based devices. In this work, we investigate evolution effect in thin films stripe-domain pattern as polarization light modulated from linear elliptical...
Sandwiching a ferroelectric between two paraelectrics squeezes out larger photovoltaic current.
Abstract The multiferroic character of Bi 2 FeCrO 6 (BFCO), that is, the coexistence ferroelectricity and ferromagnetism, has been predicted demonstrated in different studies. Intriguingly, material system also exhibits a reduced band gap, addition to bulk‐driven photovoltaic effect. co‐existence all these attributes single is rare occurrence paves way multitude practical applications, with ferroelectric solar cell as one them. In this work, epitaxially grown BFCO thin films, deposited...
Layered structures in complex oxide systems, reminiscent of superlattices, albeit naturally occurring, are often considered superior than their respective rudimentary forms. The enhanced functionalities related to the ferroic character have been known for a while now, and photoelectrical properties only very recently demonstrated. Despite improved performance, synthesis such with precise control remains be bottleneck. In this work, issue is addressed perovskite phase target...
Abstract Absence of inversion symmetry is the underlying origin ferroelectricity, piezoelectricity, and bulk photovoltaic (BPV) effect, as a result which they are inextricably linked. However, till now, only piezoelectric effects (inverse) have been commonly utilized for probing ferroelectric characteristics such domain arrangements resultant polarization orientation. The despite sharing same relation with has mostly perceived an outcome ferroelectricity not possible analytical method. In...
We demonstrate the synthesis of self-assembled three-dimensional nanocomposite thin films consisting NiO nanocolumns in an layered Aurivillius phase matrix. The structures were grown on single-crystal SrTiO3 substrates via pulsed laser deposition (PLD) with single ceramic (PbTiO3)x(BiNi2/3Nb1/3O3)1–x targets. nanocolumns, which are about 10 nm diameter each, extend over entire film thickness up to 225 nm. reveal difference electrical conduction properties and surrounding matrix nanoscale...
Photovoltaic effect in ferroelectrics can be considered as a sum of two dominant contributions, that is, arising from the ferroelectric/metal junctions and bulk ferroelectrics. In case Pb(Zr0.2Ti0.8)O3, several studies have been devoted to analyze contributions associated aspects such barrier height. this work, we elaborate on contribution bulk, role an inherent nano-sized entity, domain walls. Systematic investigations were conducted with samples different thicknesses (75–700 nm), which...
Doping of rhombohedral bismuth ferrite (BFO) with rare earth elements has been widely investigated as a pathway to extract ferromagnetic response from an otherwise antiferromagnetic material. However, increased level such doping, in conjunction the ability BFO accommodate large strain, also resulted nontrivial changes structure, i.e., transition orthorhombic structure and phase separation form vertically aligned columns. Herein, epitaxially grown single crystalline samarium oxide (Sm 2 O 3 )...
Abstract Defect or intermediate states within the band gap of ferroelectric oxides are known to impact functional characteristics such as saturated polarization. However, depending upon their respective position, levels can also induce a substantial photoelectrical response under appropriate illumination and severely conduction mechanism an otherwise highly insulating material system. Sub‐band‐gap is used highlight activity these in epitaxially grown Pb(Zr 0.2 Ti 0.8 )O 3 thin films. Large...
We exploit two dimensional arrangements of nanoparticles that serve as templates to fabricate substrates for light-management in optoelectronic devices. Strategies tailor substrate topographies through self-organization particles are described.