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

BIAGI Marco

PhD student

CAPRIATA Corrado

Post-doc

DIENY Bernard

Research scientist

GARELLO Kevin

Research scientist

KARAOUI Hanna

PhD student

MARTIN RIO Sergi

PhD student

PHAN Nhat Tan

PhD student

PREJBEANU Lucian

Research scientist

SENAPATI Kintali Subham

PhD student

SOUSA Ricardo

Research scientist

TRINH Quoc Trung

PhD student

Recent news

• Seminar : Magnetisation manipulation with light and electrons femto-second pulses (February 23rd, 2018)
  On March 29, We have the pleasure to welcome Stéphane MANGIN from Institut Jean Lamour, Université de Lorraine. He comes at Grenoble for the PHD defense of Jyotirmoy Chatterjee at 14H. He kindly offered to take ...
  
• Two very successful MRAM events organized by SPINTEC and the IEEE Magnetics Society at IEDM 2017 (January 24th, 2018)
  IEDM is the main annual conference of the IEEE Electron Devices Society. It took place in San Francisco, 4-6 December 2017. Since 2016, IEEE EDS and IEEE Magnetics Society have been collaborating on the organization ...
  
• Seminar : Ultrafast Magnetization Manipulation in Multisublattice Magnets (November 27th, 2017)
  On December 4,  we have the pleasure to welcome Marwan Deb from Université de Lorraine, France. At 11H, he will give a seminar on “Ultrafast Magnetization Manipulation in Multisublattice Magnets” in room 434A. Femtomagnetism is a relatively ...
  
• Enhanced annealing stability and perpendicular magnetic anisotropy in perpendicular magnetic tunnel junctions using W layer (November 15th, 2017)
  The stiffening of the perpendicular magnetic tunnel junction (pMTJ) stack resulting from the W insertion due to its very high melting temperature, is the key mechanism behind the extremely high thermal robustness. Thicker W layer ...
  
• Proposals for student internships for Spring 2018 (October 03rd, 2017)
  You find here the list of proposals for Master-2 internships to take place during Spring 2018. In most cases, these internships are intended to be suitable for a longer-term PhD work. Interested Master-1 students are ...
  

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Publications