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.
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.
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.
- Andrey TIMOPHEEV (2014-2017)
- Van Dai NGUYEN (2016-2018)
- J. Ranier Roiz (2015-2016)
- Nikita Strelkov (2016-2019)
- Luc TILLIE (2015-2018)
- Nicolas PERRISSIN (2015-2018)
- Jyotirmoy CHATTERGEE (2014-2017)
- Hieu Tan NGUYEN (2013-2016)
- Antoine Chavent (2013-2015)
- Jude GUELFFUCCI (2015-2017)
- Nathalie LAMARD (2016-2017)
- Guillaume LAVAITTE (2015-2016)
- Samsung SGMI (2014-2017)
- ANR Excalyb (2014-2017)
- Heumem (2015-2018)
- EU-FET Spice (2016-2019)
- EU Great (2016-2019)
- ERC Magical (2015-2020)
- 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
- Impact of heating on the stability phase diagrams of perpendicular MTJs (February 19th, 2019)
Measured switching diagrams of perpendicular magnetic tunnel junctions exhibit unexpected behavior at high voltages associated with significant heating of the storage layer. The boundaries deviate from the critical lines corresponding to the coercive field, which ...
- Seminar – All-optical magnetization switching in spin-valve structure mediated by spin-polarized hot electron transport (December 10th, 2018)
On January 29, we have the pleasure to welcome Stephane Mangin from Institut Jean Lamour, Univ. de Lorraine, Nancy, France. He will give us a seminar at 11:00, CEA/Spintec, Bat. 1005, room 434A entitled : All-optical ...
- [POSITION FILLED] Post-doctoral position – TEM magnetic haracterization of MRAM devices (November 20th, 2018)
We are looking for a post doctoral researcher to work on a project focused on measuring the magnetic fields and their stability in magnetic memory devices. The candidate will act as the liaison between Spintec ...
- PhD defense – « Study and optimization of thermal stability and temperature dependence of P-STTMRAM for industrial applications. » (November 20th, 2018)
On Wednsday 5 december, Luc TILLIE defends his PhD at 14h00 in room Chrome 1 of Maison Minatec – 3, Parvis Louis Néel, 38054 GRENOBLE Cedex . Luc TILLIE, will defend his thesis, jointly carried out ...
- Seminar – “Normally-off“ Computing for Smart Systems (November 15th, 2018)
On december 05, We have the pleasure to welcome professor Lionel TORRES from Polytech Montpellier, Université de Montpellier. He comes at Grenoble for the PHD defense of Luc TILLIE at 14H. He kindly takes this ...