Memristive multiferroic junctions (MMs)

Project Director: Dr. Bogdana BORCA

Versatile multi-level memristive elements based on multiferroic tunnel junctions have outstanding features determined by the possibility to modulate the junction’s current by independently controlling the magnetization orientation of the ferromagnetic electrodes and the ferroelectric polarization of the tunnel barrier. The coupling of these magneto-electric properties is one of the most active field of research in materials sciences opening a large spectrum of technological applications from nonvolative memory, to elements in logic circuits, sensing devices, energy harvesting, biological synapses models in the emerging area of neuromorphic computing and artificial intelligence. Herein, we will demonstrate the multi-memristive spintronic states behavior of multiferroic tunnel junctions in elements with two terminals composed of nanoscale tunneling barrier consisting on organic ferroelectric films and for the first time of biomolecules, sandwiched between two different magnetic Heusler alloys electrodes. The realization of these resistive states – a transition from TRL2 to TRL3 level - will be controlled by the dependence of the tunneling current through this heterostructure on the electrical polarization of the ferroelectric film (the tunneling electroresistance) and on the relative orientation of the magnetization of the magnetic electrodes (the tunneling magnetoresistance). Moreover, a reciprocal influence between the electric and the magnetic properties can be realized by the control of the magneto-electric coupling at the interfaces using multifunctional effects associated to temperature or mechanical changes, i.e. the pyro- and piezo-electric properties of the ferroelectrics and the magneto-caloric, magneto-restrictive and the strong spin-polarization effects of the chosen compounds of the magnetic electrodes.

Dr. Bogdana Borca -project leader

Dr. Victor Kuncser

Dr. Marcela Socol

Dr. Lucian Trupina

Dr. Gabriel Schinteie

Dr. Mihaela Sofronie

Dr. Cristina Chirila

Dr. Nicusor Iacob

Dr. Claudiu Locovei

Eng. Aurel Leca


Presentations  (talks):

  • 7th edition of the International Workshop of Materials Physics (Magurele, Romania, August 31-st 2022, oral presentation)

B. Borca "Memristive effects in multiferroic metal-organic heterostructures"

  • Physics of Interfaces and Nanomaterials, University of Twente (Enschede, Netherlands, November 18-th 2022, invited talk)

B. Borca "Artificial memory element consisting of guanine nucleobase"

  •  21-st International Balkan Workchop on Applied Physics and Materials Science -IBWAP 2023 (Constanța, Romania, July 12-th 2023, oral presentation)

B. Borca "Memristive spin-valves based on guanine nucleobase"

  •  13-th Joint European Magnetic Symposia JEMS 2023 (Madrid, Spain, September 1-st 2023, oral presentation)

B. Borca "Multiferroic metal-organic heterostructures with memristive properties"

  •  E-MRS 2024 Spring Meeting of the European Materials Research Society (Strasbourg, France, May 30-th 2024, oral presentation)

B.Borca "Spin rectification effect in multiferroic metal-organic heterojuctions"

  • EUROINVENT Expo Proceedings (Iasi, Romania, June 6-th - 8-th 2024, poster-Silver Medal award)

B. Borca et al. "Top-electrode deposition process in vertical organic junctions"

  • to be presented at 10-th International Conference on Advanced Materials (Bucharest, Romania, July 15-th 2024, oral presentation)

B. Borca "Advanced method for amino acid recognition within peptide sequences"



  • Studies on magnetic films, published in Coatings 12(9), 1366 (2022)

A.E. Stanciu et al. "Magnetic Properties of Nanosized Fe and FeCo Systems on Trenched Mo Templates"                     

  • Nanosystems-edit. presentation, published in Coatings 12(8), 1138 (2022)

B. Borca & C. Bartha, "Advances of Nanoparticles and Thin Films"

  • Studies on magnetic films, published in Materials 15(22), 8003 (2022)

M. Oumezzine et al. "Magnetocaloric and Giant Magnetoresistance Effects in La-Ba-Mn-Ti-O Epitaxial Thin Films:    Influence of Phase Transition and Magnetic Anisotropy"

  • Studies on organic systems, published in J. Phys. Chem. Lett. 14(8), 2072 (2023)

B. Borca et al. "Chiral and Catalytic Effects of Site-Specific Molecular Adsorption"

  • Studies on biomolecular systems, published in Nature Communications 14, 8335 (2023)

X. Wu=, B. Borca= et al. "Molecular sensitised probe for amino acid recognition within peptide sequences"

  • Review on multiferroic junctions, published in Coatings 14(6), 682 (2024)

B. Borca "Advances in Organic Multiferroic Junctions"



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