Nanosized Cylindrical Magnetic Conduits for Ultra-Fast Domain Wall Logic Operations

Project Title: Nanosized Cylindrical Magnetic Conduits for Ultra-Fast Domain Wall Logic Operations

Project Acronym: NanoCyliCon

Funding Source: PNCDI III - Programme 2: PN-III-P2-2.1-PED-2019

Project Code: PN-III-P2-2.1-PED-2019-0586

Contract Number: 511PED/23-10-2020

Project Duration: 23-10-2020 - 23-10-2022

Total Budget: RON 600,000

Project Summary:

The aim of this project is to develop optimized ultrathin amorphous and nanocrystalline magnetic submicron wires and nanowires to be employed as novel NanoCyliCon domain wall conduits with cylindrical symmetry, in which we will demonstrate controlled operations with ultra-fast domain walls for magnetic logic applications. The controlled domain wall operations will be: domain wall formation (i.e., nucleation), domain wall propagation (displacement), domain wall trapping (with various types of energy barriers), energy barrier crossing and domain wall interactions (collisions). Such phenomena are essential for future magnetic domain wall logic gates. The main novelty is the use of these newly developed ultrathin magnetic wires (TRL 2) to achieve such a precursor or master magnetic logic application like the optimized NanoCyliCon domain wall conduit laboratory demonstrator (TRL 3). A specific set-up will be developed within the project in order to investigate, test and control the domain wall operations in optimized amorphous and nanocrystalline submicron wires and nanowires, and to show, demonstrate, enhance and validate their repeatability limits. The final result of the project will be a domain wall conduit with superior symmetry and dynamic characteristics in which an enhanced control of ultra-fast domain wall operations will be demonstrated and validated, along with the associated know-how.

Project Team:

The research team consists of 10 people: the project director - Dr. Tibor-Adrian Óvári, five experienced Senior Scientists - Prof. Dr. Horia Chiriac, Dr. Nicoleta Lupu, Dr. Firuța Borza, Dr. Sorin Corodeanu and Dr. Mihai Țibu, two postdoctoral researchers - Dr. Mihaela Grigoraș and Dr. Cristian Rotărescu, one PhD student - Mr. Costică Hlenschi, and one experienced research technician - Ms. Carmen Nuțu.

Expected Results:

(1) Amorphous and nanocrystalline cylindrical samples, i.e. glass-coated nanowires and submicron wires with high and low magnetostriction, respectively;
(2) Experimental set-up for the investigation of the envisaged magnetic domain wall operations;
(3) Amorphous and nanocrystalline samples with optimized magnetic properties;
(4) NanoCyliCon laboratory demonstrator;
(5) Annual reports (2020 and 2021) and final project report (2022);
(6) 2 scientific articles submitted for publication in prestigious international journals;
(7) 2 papers presented at international conferences on magnetism, magnetic materials and applications.

Achieved Results (2020 - 2022):

(1) FeSiB and CoFeSiB amorphous nanowires and submicron wires for testing;

(2) Experimental set-up for the investigation of domain wall operations;

(3) Experimental data on domain wall operations in FeSiB and CoFeSiB amorphous samples, including domain wall interactions;

(4) FeCuNbSiB nanocrystalline nanowires and submicron wires for testing;

(5) Experimental data on domain wall operations in FeCuNbSiB nanocrystalline samples, including domain wall interactions;

(6) Selected optimum material for the NanoCyliCon laboratory demonstrator;

(7) 2021 Project Progress Report (summary in Romanian available here);

(8) Experimental data on post-processing of materials to enhance the control over domain wall operations;

(9) The NanoCyliCon laboratory demonstrator;

(10) Data on the demonstration of controlled domain wall operations in the NanoCyliCon conduit;

(11) 2022 Project Progress Report (summary in Romanian available here);

(12) Summary of the overall project results (available in Romanian here);

(13) 2 articles (one published and one submitted for publication) and 2 conference presentations, as detailed below, in the Dissemination section.

Dissemination

Publications:

(1) S. Corodeanu, C. Hlenschi, C. Rotărescu, H. Chiriac, N. Lupu, T.-A. Óvári, „Stochastic magnetization switching in rapidly solidified (Co0.94Fe0.06)72.5Si12.5B15 amorphous submicronic wires”, Materials, Vol. 15, No. 3, 896 (2022). https://doi.org/10.3390/ma15030896

(2) S. Corodeanu, C. Hlenschi, C. Rotărescu, H. Chiriac, N. Lupu, T.-A. Óvári, „Controlled domain wall manipulation in rapidly solidified amorphous submicronic wires”; Journal of Magnetism and Magnetic Materials (submitted).

Conferences:

• INTERMAG 2021 International Magnetics Conference, Lyon, France, April 26-30, 2021; JY-04: "Correlation between structural relaxation and magnetic behavior in amorphous submicron magnetic wires”, S. Corodeanu, C. Hlenschi, C. Rotărescu, H. Chiriac, N. Lupu, T.-A. Óvári.

• ISEM 2022 20th International Symposium on Applied Electromagnetics and Mechanics, Thessaloniki, Greece, June 5 - 8, 2022; oral presentation entitled: „Stochastic magnetization switching in amorphous submicron wires with low magnetostriction”, S. Corodeanu, C. Hlenschi, C. Rotărescu, H. Chiriac, N. Lupu, T.-A. Óvári.

Contact Details:

Dr. Tibor-Adrian Óvári
National Institute of Research and Development for Technical Physics
47 Mangeron Boulevard, 700050 Iasi
Email: taovari [at] phys-iasi.ro
Tel: 0232-430680 ext. 241
Fax: 0232-231132

Institutul Național de Cercetare-Dezvoltare pentru Fizică Tehnică - IFT Iaşi

National Institute of Research and Development for Technical Physics

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