MRAM MEMORIES

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.

Research directions

Perpendicular Anisotropy Materials

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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

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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.

CMOS Integration for Non-Volatile Logic

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The challenge to validate hybrid CMOS designs to create non-volatile logic circuits requires the backend integration of MRAM cells with custom CMOS circuits. Our goal is to provide an integration platform for proof-of-concept prototype runs.

Thermally Assisted Switching

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Perpendicular anisotropy magnetic tunnel junctions provide a solution to for high density MRAM cells where the cell diameter can be scaled to 20nm and possibly below. Thermal assisted STT writing in perpendicular cells allows large values of thermal stability, while maintaining a low critical current via the thermal re-orientation of perpendicular anisotropy storage layers.

The team

Permanent staff

SOUSA
Ricardo SOUSA
ricardo.sousa@cea.fr

DIENY
Bernard DIENY
bernard.dieny@cea.fr

NOZIERES
Jean-Pierre NOZIERES
jean-pierre.nozieres@cea.fr

PREJBEANU
Lucian PREJBEANU
lucian.prejbeanu@cea.fr

Post-docs

  • Andrey TIMOPHEEV (2014-2017)
  • Van Dai NGUYEN (2016-2018)
  • Nikita STRELKOV (2016-2019)

PhD

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

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

    Recent news

  • Poster and talk prizes at Intermag Dublin (May 03rd, 2017)
    Nearly twenty scientists from SPINTEC participated in Intermag Dublin (24-28 April 2017), among which two thirds were PhD students and post-docs. Paul Noël was awarded a session poster prize (Large and tunable spin Hall angles ...
  • Proposals for student internships for Spring 2017 (November 26th, 2016)
    You find here the list of proposals for Master-2 internships to take place during Spring 2017. In most cases, these internships are intended to be suitable for a longer-term PhD work. You may either download the ...
  • 18 months post-doc position: pMTJs for memory and microwave devices (November 16th, 2016)
    In the frame of our H2020 project GREAT we have one open position for a postdoc or term contract for 18 months to characterize the spin transfer torque induced magnetic switching as well as rf ...
  • SPINTEC’s spinoff HProbe offers 3D magnetic probers (November 03rd, 2016)
    HProbe is the latest spin-off company from SPINTEC, based on our expertise in MRAM research at the wafer scale. HProbe offers a 3D magnetic field wafer-level electrical tester for all types of MRAM (STT, SOT, ...
  • Misalign to write faster (October 17th, 2016)
    The writing in conventional magnetic memories based on magnetic tunnel junctions (STT-MRAM) is intrinsically stochastic : a large amplitude thermal fluctuation is required to trigger the siwthing of the storage layer magnetization. SPINTEC has shown ...

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