DRF: Thesis SL-DRF-17-0523 - instn

DRF: Thesis SL-DRF-17-0523
RESEARCH FIELD
Solid state physics, surfaces and interfaces / Physique de l'état condensé, chimie et nanosciences
TITLE
Memristive Magnetic Memories for spintronics synapses
ABSTRACT
Conventional electronic circuits consume much more energy than human brain at comparable performances (~50MW for supercomputer
vs 20W for human brain). Consequently, there is a strong interest in developing electronic circuits which mimic the working principle of the
brain. These circuits are particularly suited for learning functions, associative functions, pattern recognition etc. For that purpose, it is
necessary to develop new electronic components which realize neurons and/or synaptic functions. Synapses are interconnection elements
between neurons able to keep the memory of the history of the current pulses to which they have been submitted.
In this thesis, we propose to develop such electronic synapses based on spintronics phenomena and particularly the tunnel
magnetoresistance of magnetic tunnel junctions and spin transfer torque. The component resistance will vary continuously between a
minimum and a maximum value depending on the succession of current pulses flowing through it (memristor). The work will capitalize on
the strong know how existing at SPINTEC on spin-transfer torque oscillators and MRAM magnetoresistive memories.
The thesis will start by micromagnetic simulations aiming at dimensioning the device and properly choosing the most appropriate
materials. These materials will then be experimentally optimized and memristive devices will be fabricated in our clean room. They will
then be electrically tested in the lab to demonstrate the memristive behavior. Simple neuromorphic circuits will then be built to demonstrate
the capability of learning and pattern recognition.
LOCATION
Institut nanosciences et cryogénie
Spintronique et technologie des composants
Laboratoire Spintec
Place: Grenoble
Start date of the thesis: 01/10/2017
CONTACT PERSON
Liliana-Daniela BUDA-PREJBEANU
Grenoble INP
DRF/INAC/SPINTEC/SPINTEC
SPINTEC – CEA / CNRS (UMR 8191)
CEA - Bât 1005 17, rue des Martyrs
38054 GRENOBLE Cedex 9 FRANCE
Phone number: +33 4 38 78 44 19
Email: [email protected]
Commissariat à l'énergie atomique et aux énergies alternatives
Institut national des sciences et techniques nucléaires
www­instn.cea.fr
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UNIVERSITY / GRADUATE SCHOOL
Université Grenoble Alpes
Electronique, Electrotechnique, Automatique, Traitement du Signal (EEATS)
FIND OUT MORE
www.spintec.fr
THESIS SUPERVISOR
Bernard DIENY
CEA
DRF/INAC/SPINTEC/SPINTEC
SPINTEC (CEA/CNRS)
UMR 8191
Bâtiment 1005
17, rue des MARTYRS
38054 GRENOBLE Cedex 09
Commissariat à l'énergie atomique et aux énergies alternatives
Institut national des sciences et techniques nucléaires
www­instn.cea.fr
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