MTJ nanopillar fabrication

INL is capable to fabricate nanopillars out of MTJ stacks with diameters below 100 nm. We succeeded with the typical stack with free layer on top of the stack as well as reversed stacks. The later have the benefit of a free layer that is in direct contact with the bottom contact material. These two approaches were applied to fabricate devices used for research on MTJ-based spin transfer torque nano-oscillators (STNOs) and Spin Hall nano-oscillators (SHNOs) described in the following.

 

71 entries « 1 of 2 »

Iranmehr, Ensieh ; Ferreira, Ricardo ; Bohnert, Tim ; Freitas, Paulo

Developing a Data-Driven Unsupervised Pattern Recognition Approach for Sensor Signal Anomaly Detection Miscellaneous

TechRxiv, 2021.

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Wittrock, Steffen; Talatchian, Philippe; Romera, Miguel; Menshawy, Samh; Garcia, Mafalda Jotta; Cyrille, Marie-Claire; Ferreira, Ricardo; Lebrun, Romain; Bortolotti, Paolo; Ebels, Ursula; Grollier, Julie; Cros, Vincent

Beyond the gyrotropic motion: Dynamic C-state in vortex spin torque oscillators Journal Article

Applied Physics Letters, 118 (1), pp. 012404, 2021.

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Wittrock, Steffen; Talatchian, Philippe; Romera, Miguel; Garcia, Mafalda Jotta; Cyrille, Marie-Claire; Ferreira, Ricardo; Lebrun, Romain; Bortolotti, Paolo; Ebels, Ursula; Grollier, Julie; others,

Flicker and random telegraph noise between gyrotropic and dynamic C-state of a vortex based spin torque nano oscillator Journal Article

AIP Advances, 11 (3), pp. 035042, 2021.

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Leroux, Nathan; Mizrahi, Alice; Markovic, Danijela; Sanz-Hernandez, Dedalo; Trastoy, Juan; Bortolotti, Paolo; Martins, Leandro; Jenkins, Alex; Ferreira, Ricardo; Grollier, Julie

Hardware realization of the multiply and accumulate operation on radio-frequency signals with magnetic tunnel junctions Journal Article

Neuromorphic Computing and Engineering, 2021.

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Dionisio, Rogerio; Torres, Pedro; Ramalho, Armando; Ferreira, Ricardo

Magnetoresistive Sensors and Piezoresistive Accelerometers for Vibration Measurements: A Comparative Study Journal Article

Journal of Sensor and Actuator Networks, 10 (1), pp. 22, 2021.

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Jenkins, Alex S; Benetti, Luana ; Martins, Leandro ; Alvarez, Lara San Emeterio ; Ferreira, Ricardo

Spintronic wireless sensor networkshttps Journal Article

IEEE Transactions on Magnetics, pp. 1-1, 2021.

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Tanwear, Asfand; Liang, Xiangpeng; Yuchi Liu, Aleksandra Vuckovic ; Ghannam, Rami; Böhnert, Tim; Paz, Elvira; Freitas, Paulo P; Ferreira, Ricardo; Heidari, Hadi

Spintronic Sensors Based on Magnetic Tunnel Junctions for Wireless Eye Movement Gesture Control Journal Article

IEEE Transactions on Biomedical Circuits and Systems, (14), pp. 1299 - 1310, 2020, ISBN: 1940-9990.

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Danijela Markovic and Nathan Leroux and Alice Mizrahi and Juan Trastoy and Vincent Cros and Paolo Bortolotti and Leandro Martins and Alex Jenkins and Ricardo Ferreira and Julie Grollier

Detection of the Microwave Emission from a Spin-Torque Oscillator by a Spin Diode Journal Article

Phys. Rev. Applied, 13 , pp. 044050, 2020.

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Siming Zuo and Kianoush Nazarpour and Tim Böhnert and Ricardo Ferreira and Hadi Heidari

Integrated Pico-Tesla Resolution Magnetoresistive Sensors for Miniaturised Magnetomyography Miscellaneous

2020, (The work of KN is supported by grants EP/N023080/1 and EP/R004242/1 from EPSRC, UK.).

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Alex S Jenkins and Lara San Emeterio Alvarez and Roberta Dutra and Ruben L Sommer and Paulo P Freitas and Ricardo Ferreira

Wideband High-Resolution Frequency-to-Resistance Converter Based on Nonhomogeneous Magnetic-State Transitions Journal Article

Phys. Rev. Applied, 13 , pp. 014046, 2020.

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Tim Böhnert

Magnetic Nano- and Microwires: Design, Synthesis, Properties and Applications (Woodhead Publishing Series in Electronic and Optical Materials) Book

Woodhead Publishing, 2020, ISBN: 9780081028322.

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H Farkhani and T Bohnert and M Tarequzzaman and D Costa and A Jenkins and R Ferreira and F Moradi

Spin-Torque-Nano-Oscillator based neuromorphic computing assisted by laser Inproceedings

2019 14th International Conference on Design & Technology of Integrated Systems In Nanoscale Era (DTIS), IEEE, 2019.

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M Tarequzzaman and T Böhnert and M Decker and J D Costa and J Borme and B Lacoste and E Paz and A S Jenkins and S Serrano-Guisan and C H Back and R Ferreira and P P Freitas

Spin torque nano-oscillator driven by combined spin injection from tunneling and spin Hall current Journal Article

Communications Physics, 2 (1), pp. 20, 2019, ISSN: 2399-3650.

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Marilia Barreiros dos Santos and Raquel B Queirós and Álvaro Geraldes and Carlos Marques and Vania Vilas-Boas and Lorena Dieguez and Elvira Paz and Ricardo Ferreira and Joao Morais and Vitor Vasconcelos and others

Portable sensing system based on electrochemical impedance spectroscopy for the simultaneous quantification of free and total microcystin-LR in freshwaters Journal Article

Biosensors and Bioelectronics, 142 , pp. 111550, 2019.

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Pedro Torres and Rogério Dionisio and Sérgio Malhao and Luis Neto and Ricardo Ferreira and Helena Gouveia and Hélder Castro

Cyber-Physical Production Systems supported by Intelligent Devices (SmartBoxes) for Industrial Processes Digitalization Inproceedings

2019 IEEE 5th International forum on Research and Technology for Society and Industry (RTSI), pp. 73–78, IEEE 2019.

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Hooman Farkhani and Tim Böhnert and Mohammad Tarequzzaman and José Diogo Costa and Alex Jenkins and Ricardo Ferreira and Jens Kargaard Madsen and Farshad Moradi

LAO-NCS: Laser Assisted Spin Torque Nano Oscillator-Based Neuromorphic Computing System Journal Article

Frontiers in Neuroscience, 13 , 2019.

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Sheng Jiang and Martina Ahlberg and Sunjae Chung and A Houshang and R Ferreira and PP Freitas and Johan Åkerman

Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions Journal Article

Applied Physics Letters, 115 (15), pp. 152402, 2019.

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Alex S Jenkins and Lara San Emeterio Alvarez and Paulo P Freitas and Ricardo Ferreira

Nanoscale true random bit generator based on magnetic state transitions in magnetic tunnel junctions Journal Article

Scientific reports, 9 (1), pp. 1–6, 2019.

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Hooman Farkhani and Tim Böhnert and Mohammad Tarequzzaman and Diogo Costa and Alex Jenkins and Ricardo Ferreira and Farshad Moradi

Spin-Torque-Nano-Oscillator based neuromorphic computing assisted by laser Inproceedings

2019 14th International Conference on Design & Technology of Integrated Systems In Nanoscale Era (DTIS), pp. 1–5, IEEE 2019.

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Elvira Paz and Ricardo Ferreira and Paulo P Freitas

Tuning the linear range of magnetic sensors based on MTJs (Conference Presentation) Inproceedings

Spintronics XII, pp. 110903N, International Society for Optics and Photonics 2019.

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A Houshang and R Khymyn and H Fulara and A Gangwar and M Haidar and S R Etesami and R Ferreira and P P Freitas and M Dvornik and R K Dumas and J Åkerman

Spin transfer torque driven higher-order propagating spin waves in nano-contact magnetic tunnel junctions Journal Article

Nature Communications, 9 (1), 2018.

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H F Yang and F Garcia-Sanchez and X K Hu and S Sievers and T Böhnert and J D Costa and M Tarequzzaman and R Ferreira and M Bieler and H W Schumacher

Excitation and coherent control of magnetization dynamics in magnetic tunnel junctions using acoustic pulses Journal Article

Applied Physics Letters, 113 (7), pp. 072403, 2018.

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H F Yang and X K Hu and S Sievers and T Bohnert and J D Costa and M Tarequzzaman and R Ferreira and M Bieler and H W Schumacher

Coherent Control of Acoustic-Wave-Induced Magnetization Dynamics in Magnetic Tunnel Junctions Inproceedings

2018 Conference on Precision Electromagnetic Measurements, IEEE, 2018.

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M Tarequzzaman and A S Jenkins and T Böhnert and J Borme and L Martins and E Paz and R Ferreira and P P Freitas

Broadband voltage rectifier induced by linear bias dependence in CoFeB/MgO magnetic tunnel junctions Journal Article

Applied Physics Letters, 112 (25), pp. 252401, 2018, (arXiv: 1804.04104).

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T Böhnert and E Paz and R Ferreira and P P Freitas

Magnetic tunnel junction thermocouple for thermoelectric power harvesting Journal Article

Physics Letters A, 2018, ISSN: 0375-9601.

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K J Merazzo and T Costa and F Franco and R Ferreira and M Zander and M Türr and T Becker and P P Freitas and S Cardoso

Reading magnetic ink patterns with magnetoresistive sensors Journal Article

AIP Advances, 8 (5), pp. 056633, 2018.

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M Tarequzzaman and T Bohnert and A S Jenkins and J Borme and E Paz and R Ferreira and P P Freitas

Influence of MgO Tunnel Barrier Thickness on the Output Power of Three-Terminal Spin Hall Nano-Oscillators Journal Article

IEEE Transactions on Magnetics, pp. 1–4, 2018.

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R Ferreira and E Paz

Magnetoresistive sensor Patent

US20180180686A1, 2018.

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A V Silva and R Ferreira and E Paz and D C Leitao and T Devolder and S Cardoso and P P Freitas

Thermal FMR Spectral Characterization of Very Low RA In-Plane MgO Magnetic Tunnel Junctions Journal Article

IEEE Transactions on Magnetics, 53 (11), pp. 1–5, 2017.

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E G Vidal and D R Muñoz and S I R Arias and J S Moreno and S Cardoso and R Ferreira and P P Freitas

Electronic Energy Meter Based on a Tunnel Magnetoresistive Effect (TMR) Current Sensor Journal Article

Materials, 10 (10), pp. 1134, 2017.

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J D Costa and S Serrano-Guisan and B Lacoste and A S Jenkins and T Böhnert and M Tarequzzaman and J Borme and F L Deepak and E Paz and J Ventura and R Ferreira and P P Freitas

High power and low critical current density spin transfer torque nano-oscillators using MgO barriers with intermediate thickness Journal Article

Scientific Reports, 7 (1), 2017.

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T Böhnert and S Serrano-Guisan and E Paz and B Lacoste and R Ferreira and P P Freitas

Magnetic tunnel junctions with integrated thermometers for magnetothermopower measurements Journal Article

Journal of Physics: Condensed Matter, 29 (18), pp. 185303, 2017.

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M Kuepferling and F Garcia-Sanchez and T Böhnert and R Ferreira and R Dutra and R L Sommer and M Pasquale

Influence of thermal gradients on the vortex dynamics in CoFeB MTJs Inproceedings

2017 IEEE International Magnetics Conference (INTERMAG), pp. 1-1, 2017.

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T Böhnert and R Dutra and R L Sommer and E Paz and S Serrano-Guisan and R Ferreira and P P Freitas

Influence of the thermal interface resistance on the thermovoltage of a magnetic tunnel junction Journal Article

Physical Review B, 95 , pp. 104441, 2017.

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L Martins and J Ventura and R Ferreira and P P Freitas

Optimization of the buffer surface of CoFeB/MgO/CoFeB-based magnetic tunnel junctions by ion beam milling Journal Article

Applied Surface Science, 424 , pp. 58 - 62, 2017, ISSN: 0169-4332, (7th International Conference on Advanced Nanomaterials, 2nd International Conference on Graphene Technology, 1st International Conference on Spintronics Materials).

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H F Yang and X K Hu and N Liebing and T Böhnert and J D Costa and M Tarequzzaman and R Ferreira and S Sievers and M Bieler and H W Schumacher

Electrical measurement of absolute temperature and temperature transients in a buried nanostructure under ultrafast optical heating Journal Article

Applied Physics Letters, 110 (23), pp. 232403, 2017.

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T J Huisman and R V Mikhaylovskiy and J D Costa and F Freimuth and E Paz and J Ventura and P P Freitas and S Blügel and Y Mokrousov and Th. Rasing and T Kimel

Femtosecond control of electric currents in metallic ferromagnetic heterostructures Journal Article

Nature Nanotechnology, 11 , pp. 455, 2016.

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S Knudde and G Farinha and D C Leitao and R Ferreira and S Cardoso and P P Freitas

AlOx barrier growth in magnetic tunnel junctions for sensor applications Journal Article

Journal of Magnetism and Magnetic Materials, 412 , pp. 181-184, 2016.

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M Romera and P Talatchian and R Lebrun and K J Merazzo and P Bortolotti and L Vila and J D Costa and R Ferreira and P P Freitas and M C Cyrille and U Ebels and V Cros and J Grollier

Enhancing the injection locking range of spin torque oscillators through mutual coupling Journal Article

Applied Physics Letters, 109 (25), 2016.

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E Paz and R Ferreira and P P Freitas

Linearization of Magnetic Sensors With a Weakly Pinned Free-Layer MTJ Stack Using a Three-Step Annealing Process Journal Article

IEEE Transactions on Magnetics, 52 (7), 2016.

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P P Freitas and R Ferreira and S Cardoso

Spintronic Sensors Journal Article

Proceedings of the IEEE, 104 (10), pp. 1894-1918, 2016.

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Ravelo S I Arias and Ramírez D Muñoz and S Cardoso and R Ferreira and P P Freitas

Note: A non-invasive electronic measurement technique to measure the embedded four resistive elements in a Wheatstone bridge sensor Journal Article

Review of Scientific Instruments, 86 (6), pp. 066109, 2015.

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A Ravelo and I Sergio and D Ramirez and S Cardoso and R Ferreira and P P Freitas

Total ionizing dose (TID) evaluation of magnetic tunnel junction (MTJ) current sensors Journal Article

Sensors and Actuators a-Physical, 225 (119-127), 2015.

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J Valadeiro and J Amaral and D C Leitao and R Ferreira and S Cardoso and P P Freitas

Strategies for pTesla Field Detection Using Magnetoresistive Sensors With a Soft Pinned Sensing Layer Journal Article

IEEE Trans. Magn, 51 (1), pp. 4400204, 2015.

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S Sievers and N Liebing and S Serrano-Guisan and R Ferreira and E Paz and A Caprile and A Manzin and M Pasquale and W Skowronski and T Stobiecki and K Rott and G Reiss and J Langer and B Ocker and H W Schumacher

Toward Wafer Scale Inductive Characterization of Spin-Transfer Torque Critical Current Density of Magnetic Tunnel Junction Stacks Journal Article

IEEE Trans. Magn, 51 (1), pp. 1400804, 2015.

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A Caprile and A Manzin and M Coisson and M Pasquale and H W Schumacher and N Liebing and S Sievers and R Ferreira and S Serrano-Guisan and E Paz

Static and Dynamic Analysis of Magnetic Tunnel Junctions With Wedged MgO Barrier Journal Article

IEEE Trans. Magn, 51 (1), pp. 4400304, 2015.

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J D Costa and S Serrano-Guisan and J Borme and F L Deepak and M Tarequzzaman and E Paz and J Ventura and R Ferreira and P P Freitas

Impact of MgO Thickness on the Performance of Spin-Transfer Torque Nano-Oscillators Journal Article

IEEE Transactions on Magnetics , 51 (11), 2015.

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M Costa and J Gaspar and R Ferreira and E Paz and H Fonseca and M Martins and S Cardoso and P P Freitas

Integration of magnetoresistive sensors with atomic force microscopy cantilevers for scanning magnetoresistance microscopy applications Journal Article

IEEE Transactions on Magnetics, 51 , 2015.

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D C Leitao and A V Silva and E Paz and R Ferreira and S Cardoso and P P Freitas

Magnetoresistive nanosensors: controlling magnetism at the nanoscale Journal Article

Nanotechnology, 27 (4), 2015.

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D C Leitao and E Paz and A Silva and A Moskaltsova and S Knudde and F L Deepak and R Ferreira and S Cardoso and P P Freitas

Nanoscale Magnetic Tunnel Junction Sensing Devices With Soft Pinned Sensing Layer and Low Aspect Ratio Journal Article

IEEE Trans. Magn, 50 (11), pp. 4410508, 2014.

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