Crocus-technology Sa

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Centre National De La Recherche Scientifique

Crocus Technology Inc.

Yann Conraux

Jean-Pierre Nozieres

Quentin Stainer

Lucien Lombard

Jeremy Alvarez-Herault

Myckael Mouchel

Jérémy Alvarez-Hérault

Laurent Ranno

A MLU-based magnetic device including a plurality of MLU-based magnetic cells, each MLU cell including a first ferromagnetic layer having a first magnetization, a second ferromagnetic layer having a second magnetization, and a spacing layer between the first and second ferromagnetic layers. An input device is configured for generating an input signal adapted for changing the orientation of the first magnetization relative to the second magnetization and vary a resistance of the MLU device. A bit line is configured for passing a sense signal adapted for measuring the resistance. A processing unit is configured for computing an electrical variation from the sense signal and outputting an electrical variation signature. The present disclosure further pertains to an authentication method for reading the MLU device.

MLU-based magnetic device having an authentication and physical unclonable function and authentication method using said MLU device

A magnetoresistive-based signal shaping circuit for audio applications includes: a field emitting device configured for receiving an input current signal from an audio signal source and for generating a magnetic field in accordance with the input current signal, and a first magnetoresistive element having a first electrical resistance and electrically connected in series to a second magnetoresistive element having a second electrical resistance. The magnetoresistive-based signal shaping device provides an output signal across the second magnetoresistive element when an input voltage is applied across the first and second magnetoresistive element in series. The output signal is a function of the electrical resistance and yields a dynamic range compression effect. The first and second electrical resistance vary with the magnetic field in an opposite fashion.

Magnetoresistive-based signal shaping circuit for audio applications

Method for programming a magnetic device including a plurality of magnetic logical unit MLU cells using a single programming current, each MLU cell includes a storage magnetic layer having a storage magnetization that is pinned at a low threshold temperature and freely orientable at a high threshold temperature. A programming line is physically separated from each of the plurality of MLU cells and configured for passing a programming current pulse for programming any one of the plurality of MLU cells. The method includes: passing the programming current in the field line for heating the magnetic tunnel junction of each of the plurality of MLU cells at the high threshold temperature such as to unpin the second magnetization; wherein the programming current is further adapted for generating a programming magnetic field adapted for switching the storage magnetization of each of the plurality of MLU cells in a programmed direction.

Method for writing in a magnetic device having a plurality of magnetic logical unit cells using a single programming current

Self-reference-based MRAM element including: first and second magnetic tunnel junctions, each having a magnetoresistance that can be varied; and a field line for passing a field current to vary the magnetoresistance of the first and second magnetic tunnel junctions. The field line includes a first branch and a second branch each branch including cladding. The first branch is arranged for passing a first portion of the field current to selectively vary the magnetoresistance of the first magnetic tunnel junction, and the second branch is electrically connected in parallel with the first branch and arranged for passing a second portion of the field current to selectively vary the magnetoresistance of the second magnetic tunnel junction. The self-referenced MRAM element and an MRAM device including corresponding MRAM elements can use a reduced field current.

Self-referenced MRAM element and device having improved magnetic field

The present disclosure concerns a self-referenced magnetic random access memory-based ternary content addressable memory (MRAM-based TCAM) cell comprising a first and second magnetic tunnel junction; a first and second conducting strap adapted to pass a heating current in the first and second magnetic tunnel junction, respectively; a conductive line electrically connecting the first and second magnetic tunnel junctions in series; a first current line for passing a first field current to selectively write a first write data to the first magnetic tunnel junction; and a second current line for passing a write current to selectively write a second write data to the second magnetic tunnel junction, such that three distinct cell logic states can be written in the MRAM-based TCAM cell.

High speed magnetic random access memory-based ternary CAM

The invention concerns a magnetic memory, whereof each memory point consists of a magnetic tunnel junction (), comprising: a magnetic layer, called trapped layer (), whereof the magnetization is rigid; a magnetic layer, called free layer (), whereof the magnetization may be inverse; and insulating layer (), interposed between the free layer () and the trapped layer () and respectively in contact with said two layers. The free layer () is made with an amorphous or nanocrytallized alloy based on rare earth or a transition metal, the magnetic order of said alloy being of the ferromagnetic type, said free layer having a substantially planar magnetization.

Magnetic memory with spin-polarized current writing, using amorphous ferromagnetic alloys, writing method for same

The invention relates to a magnetic memory with write inhibit selection and the writing method for same. Each memory element of the invention comprises a magnetic tunnel junction () consisting of: a magnetic layer, known as the trapped layer (), having hard magnetisation; a magnetic layer, known as the free layer (), the magnetisation of which may be reversed; and an insulating layer () which is disposed between the free layer () and the trapped layer () and which is in contact with both of said layers. The free layer () is made from an amorphous or nanocrystalline alloy based on rare earth and a transition metal, the magnetic order of said alloy being of the ferrimagnetic type. The selected operating temperature of the inventive memory is close to the compensation temperature of the alloy.

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Sassenage, France

Yann Conraux