BrainMap

Mr. Daniel Vizman

Prof.dr.

Professor - UNIVERSITATEA DE VEST TIMISOARA

Teaching staff

Curriculum Vitae (14/05/2024)

Expertise & keywords

Synthesis and characterization of perovskite high entropy oxides and investigation of their proximity effect with high cuprate superconductors Call name: P 1 - SP 1.1 - Proiecte de cercetare Postdoctorală - PD-2021
PN-III-P1-1.1-PD-2021-0238 2022 - 2024

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation:

Project website: http://quasar.physics.uvt.ro/~apopescu/HEOHTS

Abstract:

The coexistence of competing orders like magnetism and superconductivity (SC) (or charge order and superconductivity) has obtained a lot of interest over the past years. The physical proximity of two such different phases showing competing orders can lead to a virgin territory of unprecedented phenomena that remains to be explored. When two such phases are brought in close contact, each phase loses a bit of its own attribute and gains something extra from the neighboring phase. In general, this effect is termed as proximity effect. For an example, it has been found that in a SC/Ferromagnet(FM) junction, the magnetism of the FM is suppressed, whereas the superconductor can obtain some magnetic moment. In continuation to my previous PhD research on Nd1-x(Ca1-ySry)xMnO3(NCSMO)/YBa2Cu3O7(YBCO) heterostructures, in this project, I propose to study the synthesis and characterization of a main Mn-based high entropy oxides (Mn-HEO): Nd(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 using solid-state reaction and study their physical properties like resistivity, dielectric and optical properties and magnetism in polycrystalline, single-crystalline and epitaxial thin film form. Finally, we would like to prepare epitaxial (Mn-HEO/YBCO) heterostructures and study their mutual proximity effect. Synchrotron based techniques like X-ray absorption spectroscopy, Resonant x-ray scattering, optical spectroscopy, Photo-Emission Electron Microscopy will be used for this study.

All-sky imager-based solar power forecasting system for smart-grid operation Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2019-3942 2020 - 2022

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website: http://solar.physics.uvt.ro/asifor

Abstract:

The main objective of this project consists in the improvement of PV plant output power forecasts, on the road to a smart-grid management. This is planned to be achieved by developing an innovative forecasting tool (ASIFOR) based on tracking the state-of-the-sky using all-sky imager data. The tool consists of three distinctive devices: (1) The computational module, where the forecasting applications developed within this project are implemented and which real-time controls the forecasting process. (2) The PV plant monitoring module which provides radiometric and meteorological data measured in-situ, data required for running the forecasting applications and (3) The state-of-the-sky monitoring module which quantifies and forecasts the relative position of the Sun and clouds by sky image processing taken with a digital fisheye camera. ASIFOR is planned to be developed at a trial product stage TRL4 (the “ugly” prototype in terms of TRL) and validated on the Solar Platform of the West University of Timisoara. The proof of the ASIFOR concept is ensured by the recent results of our team obtained in various domains related to the forecasting of the PV energy production, such as the development of enhanced models for solar resources. The novelty of this proposal is the insertion into the forecasting statistical procedures of the probability that the Sun will be covered or not by clouds, as result from the direct observation of the sky. The impact of the project results can be evaluated on minim four levels: (1) scientific (improving the forecasting accuracy); (2) economical (notable contribution to ensuring the grid stability, accurate forecasts will enable the computers to take control actions for balancing the power grid); (3) technical (a new forecasting tool); (4) practical (the project timely comes to meet the needs of the operators involved in the production and transport of PV energy).

Technologic paradigms in synthesis and characterization of variable dimensionality systems Call name: P 1 - SP 1.2 - Proiecte complexe realizate in consorții CDI
PN-III-P1-1.2-PCCDI-2017-0152 2018 - 2021

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU TEHNOLOGII CRIOGENICE SI IZOTOPICE - I.C.S.I. RAMNICU VALCEA (RO); UNIVERSITATEA DE VEST TIMISOARA (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU FIZICA TEHNICA-IFT IASI (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website: http://infim.ro/project/vardimtech/, http://infim.ro/project/vardimtech-en

Abstract:

Last decades brought a considerable development of technologies based on ordered systems. Starting with semiconductor physics and photovoltaics, technologies soon evolved towards the utilisation on large scale of thin films and of surface / interface properties. Example go nowadays from data storage and readout (electrostatic or magnetic memories, giant magnetoresistance) to catalysis, gas sensors or photocatalysis (surface phenomena), and towards interfaces with biological matter (biosensors, templates for tissue reconstruction, interfaces between biological electrical signals and microelectronics). In Romania, crystal growth is performed since half a century; nevertheless, during the last years these activities fade out and need to be seriously reinforced, especially with the advent of new laser and detector technologies required by the Extreme Light Infrastructure facilities. Also, surface science started to be developped seriously only during the last decade, together with techniques involving self-organized nanoparticles, nanoparticle production etc. The main goal of this Project is to gather the relevant experience from the five partners, namely the experience in crystal growth from the University of Timișoara, with the surface science, nanoparticle and nanowire technologies developped by NI of Materials Physics, the cryogenic and ultrahigh vacuum techniques provided by the NI for Cryogenic and Isotopic Technologie, and the experience in ordered 2D systems (graphene and the like) owned by the NI for Microtechnologies (IMT). This common agenda will result in a coherent fostering of technologies relying on ordered systems of variable dimensionalities: 0D i.e. clusters or nanoparticles, including quantum dots; 1D i.e. free and supported nanowires and nanofibers; 2D: surfaces, interfaces and graphene-like systems; and 3D crystals of actual technological interest, together with setting up new ultrahigh vacuum, surface science and electron spectroscopy techniques.

Instrument de prognoza a puterii PV pentru managementul retelelor inteligente Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-0592 2017 - 2018

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website: http://solar.physics.uvt.ro/forpv

Abstract:

The main objective of the project is to build an innovative toolkit (FORPV) for forecasting the energy production of a photovoltaic (PV) plant in the time domain of a few minutes up to one day ahead. The forecasts provided by FORPV must meet two key requirements: (1) to be of high quality and (2) to be effectively structured (as lead times, frequency) in compliance with the needs of the PV plants and grid operators. The eight sets of European regulations for the operators of the transport grids launched in 2016 will be considered.

FORPV consists of two distinctive physical parts: (1) The computational unit, where the forecasting applications developed within this project are implemented and which real-time controls the forecasting process; (2) The PV plant monitoring unit which provides radiometric and meteorological data measured in-situ, required for running the forecasting applications. The forecasting toolkit FORPV is planned to be developed at the trial product stage (the “ugly” prototype in terms of TRL) and validated on the Solar Platform of the West University of Timisoara. The proof of the concept is ensured by the recent results of our team obtained in various domains related to the forecasting of the PV energy production, e.g. correlation of solar irradiance with sunshine quantifiers, new models for nowcasting solar irradiance, new procedures for describing the PV systems operation in outdoor conditions.

The impact of the project outcomes can be evaluated on minim four levels: (1) scientific (improving the forecasting accuracy); (2) economical (notable contribution to ensuring the grid stability, accurate forecasts will enable the computers to take control actions for balancing the power grid); (3) technical (new forecasting tool); (4) practical (the project timely comes to meet the needs of the PV plants owners and transport grid operators, as well as the management of PV power generated inside the distribution grids).

Control of melt flow in a directional solidification configuration using an electromagnetic field Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0789 2011 - 2016

Role in this project:

Coordinating institution: Universitatea de Vest din Timisoara

Project partners: Universitatea de Vest din Timisoara (RO)

Affiliation: Universitatea de Vest din Timisoara (RO)

Project website: http://www.physics.uvt.ro/~vizman/idei_dv

Abstract:

Bridgman-type directional solidification is the most mature technology for industrial production of multi-crystalline silicon ingots for photovoltaic applications. After melting of the starting material, crystallization occurs due to a mechanical movement of the mould or by controlled reduction of the heating power. The properties of multi-cristalline silicon, like minority carrier lifetime or diffusion length are correlated to the content and the occurrence of C, N, O and SiC-and Si3N4-precipitates in the melt and in the crystal. It is an aim of current technology development to control the impurities distribution in the mould. Recently, the interest for applying magnetic fields in directional solidification of multi-crystalline silicon increased because of the great potential of magnetic fields to control the melt flow. Present project proposed a novel method of melt control in directional solidification method. The main idea is to obtain a melt stirring in a directional solidification rectangular configuration using a special type of an electromagnetic field. The mould is placed in a vertical magnetic field and an electrical DC current passes the melt through two or more small diameter electrodes attached to the melt surface. The potential of this method to control the melt flow and impurities distribution will be studied both by numerical modeling and experimental measurements of melt flow. A model experiment will be build.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator	Download (52.5 kb) 16/04/2016
List of research grants as partner team leader
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects