BrainMap

Mr. Coriolan Tiusan

Professor, PhD, Habilitation

Professor - UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Other affiliations

Senior research Scientist - National Center of Scientific Research (CNRS) (France)

Researcher | Teaching staff | Scientific reviewer

ResearcherID: not public

Curriculum Vitae (22/04/2020)

Expertise & keywords

Emerging sensors and data storage spintronic devices based on magnetic tunnel junctions with enhanced efficiency magnetization manipulation Call name: P 4 - Proiecte de Cercetare Exploratorie
PN-III-P4-ID-PCE-2016-0143 2017 - 2019

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: https://spin.utcluj.ro/Current%20projects%20-PNIII-ID22-2017.html

Abstract:

The main objective of the project consists on the study and the elaboration of new generation spintronic devices with applications in sensor/data storage technologies, whose operation is based on innovative low consumption magnetization manipulation. Its attaining implicates a deep understanding of the underlying physics related to magnetism, spin and charge transport in multilayered thin film mesoscopic structures constituted by complex materials with tailored functional properties. Moreover, delicate technological issues have to be precisely mastered: multistep lithography patterning of spintronic pillar devices with electronic transport perpendicular to the layer’s plane and lateral sizes within the nanometric to micrometric range. The elementary brick of the targeted sensor is the MTJ, based on thin films materials with tailored functional properties. The manipulation of the MTJ magnetization is scheduled to be performed following two mechanisms: (1) the voltage-controlled electric field (E-field) effect on anisotropy and (2) the spin-transfer torque (STT) effect induced by spin-polarized current. While the STT mechanisms have been widely studied in the last decade and already led to novel generation of nonvolatile magnetic random access memories (STT-MRAM), from fundamental point of view, our study surveys the E-field magnetization manipulation. Therefore, we aim to shed light on the complex charge-driven mechanism underlying the E-ﬁeld control of the PMA. This represents a particularly difficult problematics, especially when dealing with complex magnetic alloy materials with tunable spin polarization and Gilbert damping in epitaxial MTJ multilayer stacks where the electronic transport is controlled by Bloch symmetry filtering effects. The project concluding objective is oriented towards technological transfer targeting a new generation device: elementary cell of a non-volatile data storage matrix with low power consumption information manipulation capacity.

Mesoscopic spintronic devices with tailored magneto-transport properties Call name: Exploratory Research Projects - PCE-2012 call
PN-II-ID-PCE-2012-4-0315 2013 - 2016

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICA CLUJ-NAPOCA

Project partners: UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)

Project website: http://www.c4s.utcluj.ro/Current%20projects%20-PNII-ID23-2012.html

Abstract:

This project addresses innovative fundamental physics of spin and charge transport in Magnetic Tunnel Junctions (MTJ) employing half-metallic ferromagnetic (FM) electrodes with low Gilbert damping and tailor their magneto-transport properties and application potential. The dependence of magnetic anisotropy on the film thickness, composition and interface symmetries will be investigated, aiming towards perpendicular magnetic anisotropy (PMA). Specific MTJ architectures with engineered characteristics, patterned in micrometric and nanometric size pillars, will be elaborated using interface chemical tuning and inserting symmetry dependent quantum wells. They will be characterized by local near field techniques and by temperature and field-dependent tunneling spectroscopy. We focus on understanding the depolarizing mechanisms, lose and recovery of half-metallicity by symmetry filtering effects. The transport mechanisms will be analyzed from correlated static DC and dynamic (noise) transport spectroscopy in variable temperature. The spin torque related noise enhancement in low Gilbert damping FM electrodes based MTJs will be addressed. The influence of electronic structure and magnetism of interfaces on spin and charge transport, the interplay between spin-orbit coupling, PMA, and anisotropic tunneling magnetoresistive effects will be investigated. The experimental studies will be accompanied by theoretical modeling by combining ab-initio, analytical and numerical approaches.

Research and developement of mesoscopic size spintronic devices Call name:
ID. 574, cod SMIS-CSNR 12467 2010 - 2014

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: https://c4s.utcluj.ro/WEB_SPINTRONIC/spintronic.html

Abstract:

tandarde europene si internationale în cadrul Universitatii Tehnice din Cluj-Napoca, în domeniul stiintific si tehnologic de vârf al fizicii si tehnologiei dispozitivelor spintronice cu aplicatii în industria senzorilor.

FILE DESCRIPTION	DOCUMENT
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