Nanomagnet-logic integrated platform with arrays of magnetic tunnel junctions, with laser reversed magnetization for spintronic memories and nanosensors

Project Director: Dr. Ovidiu CRISAN
Project ID:
Project Director:
Dr. Ovidiu Crisan
Project Type:
Project Program:
Funded by:
Romanian National Authority for Scientific Research, UEFISCDI

National Institute of Materials Physics

Project Status:
Start Date:
Saturday, 1 July, 2017
End Date:
Sunday, 1 December, 2019
Project Abstract:

The project proposes to conceive and produce a nanomagnet-logic integrated platform made of magnetic tunnel junctions coupled with photonic layers, that will be optically switched, a demonstrator element for spintronic type memory. This conceptually new integrated platform, with applicability as spintronic photonic memory may perform with faster speed and may exhibit lower energy consumption than those in state-of-the-art technologies, due to the completely innovative method of magnetization reversal with the use of femtosecond laser. The novel integration platform that combines photonic, magnetic and electronic components exhibit  advantages over the existing spin-based memories due to highly improved write speed and reduced write power provided by the newly proposed mechanism of magnetization reversal by femtosecond laser pulses. A new material will be developed in order to enable the combination of photonic, electronic and magnetic components, and new architectures will be designed for proving the potential use in novel integrated circuit technology. The project is founded on the basis of previously achievements in the fields of magneto-optic interactions, on chip integration of magnetic materials into hybrid nanoelectronic-magnetic devices, and on the expertise in design of spintronic elements, nanoscale materials, lithography technology for on-chip integration of magnetic elements on logic conditioned substrates

Project Objectives:

Stage I: Creation of a MTJ multilayer as a basis for memory elements (dec. 2017)

Stage II:  Demonstration of light assisted magnetization reversal of the MTJ element. Conceptualization of the magneto-optic technology for integration onto Si substrate. (dec. 2018).

Stage III: Validation of key performance indicators by testing the memory element demonstrator. Strategies for conception of an integrated platform with light assisted magnetization reversed MTJ (dec. 2019).

Dr. Alina Daniela Crisan

Drd. Aurel Leca

Dr. Andreea Costas

Drd. Anda Elena Stanciu

Dr. Victor Kuncser

Dr. Gabriel Schinteie

Dr. Florin Vasiliu

Dr. George Filoti


The results of the 1st stage, a stage that has been concluded in December 2017, have been categorized in agreement to the project objectives to be fulfilled in scientific, project management and dissemination. Scientific results, linked to and derived from the 1st stage activity related to the creation of MTJ elements, were mainly represented by the design of the free layer of the MTJ stack (D1.1), the design of the MTJ multilayer structure (D1.2). Project management results included the creation of the website (D5.1), the risk management (D5.3) and the quality assurance plans (D5.2) as well as the annual report plan (D5.4). The dissemination results have been concluded with communications at international conferences and 1 publication in ISI ranked journal.

The results of the 2nd stage, to be fulfilled in December 2018 are also divided into three main categories: scientific, management and dissemination. Scientific results include the creation of MTJ elements for light assisted magnetization switching (D2.1) and the architectural design of the MTJ arrays with optical and electrical control (D2.2). The management results include the realization of a fabrication technology roadmap for hybrid nanomagnet-logic devices, in line with the International Technology Roadmap for Semiconductors (ITRS 2.0) (D4.2) as well as the annual research report (D5.4). The dissemination results include participation and oral communications at international, high-visibility conferences as well as 5 publications in ISI ranked journals (D4.3).

List of papers :

  1. Crisan, AD; Vasiliu, F; Mercioniu, I; Bartha, C; Enculescu, M; Crisan, O; “Annealing-Induced High Ordering and Coercivity in Novel L1(0) CoPt-Based Nanocomposite Magnets” Metals 8 (2018) 466 (IF: 2.26)
  2. Crisan, AD; Vasiliu, F; Nicula, R; Bartha, C; Mercioniu, I; Crisan, O; “Thermodynamic, structural and magnetic studies of phase transformations in MnAl nanocomposite alloys” Materials Characterization 140 (2018) 1-8 (IF: 3.22)
  3. A.D. Crisan, O. Crisan “Incipient low-temperature formation of MAX phase in Cr-Al-C films” Journal of Advanced Ceramics 7 (2018) 143-151 (IF: 2.3)
  4. A.D. Crisan, O. Crisan “Low-Temperature Formation of 312 phase in Ti-Si-C ternary compounds” Digest Journal of Nanomaterials and Biostructures 13 (2018) 155-162
  5. O. Crisan, F. Vasiliu, A.D. Crisan, I. Mercioniu, G. Schinteie, A. Leca, “Structure and magnetic properties of highly coercive L1(0) nanocomposite FeMnPt thin films”, Materials Characterization 152 (2019) 245-252 (IF: 3.22)
  6. O. Crisan, A.D. Crisan, C.R. Luculescu, “Hybrid Nanoelectronic-magnetic Device with Magnetoresistive Effect for logic integrated platforms in spintronics”, Nanomaterials (IF: 2.23) under review 2019. DOI: 10.20944/preprints201909.0225.v1

List of communications at international conferences:

  1. Klein, T.; Rohlsberger, R.; Burkel, E.; Crisan, O.: New concept for information storage in magnetic films exchange-coupled through non-magnetic layer 2017 Prezentare Orala, Proceedings of 12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 2017 IEEE 12TH INTERNATIONAL CONFERENCE ON NANO/MICRO ENGINEERED AND MOLECULAR SYSTEMS (NEMS)   Pages: 682-686   Published: 2017
  2. O. Crisan: Hard Magnetic Properties and Interlayer Exchange Couplings in Rare earth Free Fe-Pt-Mn layered nanomagnets 2017 (oral presentation) Proceedings of the XXVI International Materials Research Congress (IMRC 2017).


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