MRAM

Overview

The Magnetic Random Access Memories (MRAM) group develops advanced concepts in this emerging technology. The goal is to realize cells with improved thermal stability, lower power consumption and/or faster switching. Our research covers material stack deposition, nano-fabrication and electrical test evaluation, for applications as standalone memory and non-volatile logic and more recently in neuromorphic computing architectures.

Research directions

Perpendicular Anisotropy Materials

High energy barriers for spin transfer torque (STT) MRAM cells can be achieved with perpendicular anisotropy magnetic tunnel junctions. Solutions for high density MRAM cells to diameters below 20nm require continuous improvements in perpendicular surface anisotropy, while maintaining high TMR properties.

Perpendicular STT MRAM

Evaluation of MRAM concepts requires simulation of expected reversal mechanisms and electrical characterization of individual cells. We aim at understanding dynamics of magnetization reversal and the expected impact of stack modifications to explore application specific optimizations.

Nanofabrication Challenges

Innovation on dense MRAM using pre-patterned substrates, CMOS integration of multifunctional cells and sub-10nm lateral sizes. Tunnel junction nanofabrication in our platform is essential to evaluate MRAM concepts and performance.

Perpendicular Shape Anisotropy

A solution for sub-10nm cell sizes uses high aspect ratios to generate perpendicular shape anisotropy providing scalable retention at the smallest cell sizes. Spin transfer torque switching is possible in these cells, where the reversal dynamics is now under study.

The team

Former members

Post-docs

  • Andrey TIMOPHEEV (2014-2017)
  • Van Dai NGUYEN (2016-2018)
  • J. Ranier Roiz (2015-2016)
  • Nikita Strelkov (2016-2019)

PhD

  • Luc TILLIE (2015-2018)
  • Nicolas PERRISSIN (2015-2018)
  • Jyotirmoy CHATTERGEE (2014-2017)
  • Hieu Tan NGUYEN (2013-2016)
  • Antoine Chavent (2013-2015)

Process Engineers

  • Jude GUELFFUCCI (2015-2017)
  • Nathalie LAMARD (2016-2017)
  • Guillaume LAVAITTE (2015-2016)

Projects

  • Samsung SGMI (2014-2017)
  • ANR Excalyb (2014-2017)
  • Heumem (2015-2018)
  • EU-FET Spice (2016-2019)
  • EU Great (2016-2019)
  • ERC Magical (2015-2020)

Partners

  • CEA LETI, Grenoble, France
  • Institut NEEL, Grenoble, France
  • Crocus Technology, Grenoble, France
  • Samsung, San Jose, USA
  • Singulus AG, Kahl am Main, Germany
  • Aarhus University, Aarhus, Denmark
  • Radboud Universiteit, Neijmegen, Netherlands

Recent news

  • Spin accumulation dynamics in spintronic devices in the terahertz regime (March 26th, 2020)Spin accumulation dynamics in spintronic devices in the terahertz regime
    Spin accumulation phenomena frequently occur in spintronic devices due to the difference of electrical resistivities of spin-up and spin-down electrons in magnetic materials. They are balanced by spin relaxation phenomena. These phenomena take place in ...
  • Hprobe, la pépite française qui veut accélérer le test de mémoires et capteurs magnétiques (February 04th, 2020)Hprobe, la pépite française qui veut accélérer le test de mémoires et capteurs magnétiques
    Hprobe passe à la vitesse supérieure. Après avoir levé 300 000 euros en avril 2018, la start-up issue de SPINTEC et spécialiste du test magnétique de composants semi-conducteurs vient de boucler un deuxième tour de ...
  • COMRAD – An H2020 ITN project (January 16th, 2020)COMRAD - An H2020 ITN project
    Overview COMRAD is an H2020 ITN projet (2020-2024). It will explore novel routes for the fastest possible and least dissipative magnetic switching in random access devices by bringing together the two disciplines of ultrafast magnetism and ...
  • Spintronic memristor based on an isotropically coercive magnetic layer (December 03rd, 2019)Spintronic memristor based on an isotropically coercive magnetic layer
    We propose an original concept of spintronic memristor based on the angular variation of the tunnel magnetoresistance (TMR) of a nanopillar comprising several magnetic layers. We have experimentally developed the appropriate magnetic free layer and ...
  • Masters thesis projects for Spring 2020 (September 30th, 2019)Masters thesis projects for Spring 2020
    You find here the list of proposals for Master-2 internships to take place at Spintec during Spring 2020. In most cases, these internships are intended to be suitable for a longer-term PhD work. Interested Master-1 ...

Publications

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