HEИндивидуална стипендия2024–2026

FemtoSense · Pushing the limits of detection in spintronic sensors into the femtoTesla range

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2024-04-01 → 2026-03-31
Финансиране от ЕС: 203 464 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

Линиите свързват координатора с партньорите.

Накратко на български

Спинтронните сензори с тунелно магнитно съпротивление се изследват чрез промяна на техните материали, за да откриват изключително слаби магнитни полета. Това помага за подобряване на биомедицинските измервания, автономното шофиране и енергийната ефективност на електромобилите.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Pushing the limits of detection in spintronic sensors into the femtoTesla range

The development of innovative and compact magnetic field sensors with high sensitivity and ultra-low detection levels is a key ingredient for advancing the next generation precision tools in healthcare and more energy-efficient sensing technologies. This project addressed spintronic sensor technologies, with a focus on tunnel magnetoresistance (TMR) devices. These are promising candidates for pushing beyond picoTesla range detectivities in the low-frequency regime (<100 Hz) and at room temperature. This provides the base specifications for applications in biomagnetic signal detection, autonomous driving, electrical vehicles sensorization, even opening doors to novel quantum metrology systems. The fundamental TMR sensors structures are composed of nanometer scale multilayer thin films, where the basic blocks include two ferromagnetic layers (e.g., Fe, Co, Ni, or their alloys) separated by a tunnel oxide barrier (e.g., AlO or MgO). TMR devices offer advantages such as elements with reduced dimensions, tunable sensitivity, compatibility with CMOS fabrication processes, and a broad range of operation temperatures. The FEMTOSense project aimed at delivering novel material based solutions to meet the stringent performance requirements of ultra-sensitive TMR sensors. The project proposed to bridge fundamental physical knowledge of the mechanisms that govern intrinsic noise contributions by using materials science and device engineering to manipulate the physical properties of thin films. Specifically, the chosen approaches focused on the precise tuning of the compositional, structural and magnetic properties of the main building blocks in TMR multilayers, with particular emphasis on the sensing and barrier layers.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Novel and compaImplementation of solid-state magnetic field sensors with ultra-high sensitivity and ultra-low magnetic-field detectivity is mandatory to accelerate the development of individualized and precision healthcare devices and promote the change to more energy efficient green technologies. Unlike other studies, the project will provide major advances in the field of spintronic tunneling magnetoresistance (TMR) sensors by pushing their limit of detectivity to the femtoTesla range without using external tools as magnetic flux concentrator, which is an artificial technique to increase sensitivity regardless to the origin of limitation in TMR multilayer structure as noise sources. For that, FEMTOSense is to pinpoint the origin and mechanisms that govern all noise contributions, and their control, on-demand, using materials science and device engineering. To do this, I will develop highly (001)-textured spinel oxide MgAl2O4 (MAO) tunneling barriers enabling tunable lattice matching with wide range of ferromagnetic electrodes particularly CoFeB, to suppress the interfacial imperfection (noise) at the interface and improve TMR ratio. I will also improve the quality of the ferromagnetic electrodes by development of functional sensing layers consisting of sandwich-like amorphous ferromagnet. The ferromagnetic sandwich comprises thin layers of super-soft NiFe inserted between amorphous phase of CoFeBTa ferromagnetic layers. The former is to prevent propagation of 111-texture of NiFe to MAO barrier, ensuring ordering interface with minimized electronic noises. The latter is to tune the structural and magnetic characteristics of the sensing layers, enabling high sensitivity and suppressing magnetic noise at the sensing layer. Finally, I will establish a framework to map all sources of noise within each of the spintronic sensor building blocks, and identify the method of treatment by theoretical modeling for demonstration of femtoTesla tunneling magnetoresistnce sensors.

Оригинален текст от CORDIS (на английски).

Участници

TECHNISCHE UNIVERSITEIT EINDHOVEN · EindhovenКоординаторНидерландия