H2020Индивидуална стипендия2019–2020

ARTES · AntifeRromagnetic spin Transport and Switching

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-01-01 → 2020-12-31
Финансиране от ЕС: 159 461 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Антиферомагнитните материали, при които магнитните моменти са подредени редундерно, се изследват за пренос и управление на информация чрез спинови токове. Това може да доведе до създаването на електронни компоненти с по-ниска консумация на енергия и по-висока скорост от силициевите.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

AntifeRromagnetic spin Transport and Switching

Magnetic materials and devices play a tremendous role in information technology and are a key tool to meet many current societal challenges. They might enable the exploration of the human brain with non-invasive sensors and IT devices with low environmental impact. Antiferromagnetic materials are magnetic materials with alternating orientation of the atomic magnetic moments, having thus a zero net stray magnetic field. This is different from ferromagnetic materials like fridge magnets. Antiferromagnetic spintronics is considered as a disruptive approach, enabling efficient spintronic devices, potentially replacing silicon-based microelectronics components in the future. Louis Néel received in 1970 the Nobel prize in Physics for his studies on antiferromagnetic materials, describing them as “interesting but useless”, which was believed at the time. Today we know that ultimate stability and speed indicate significant untapped potential of this class of materials, where information can be stored in the antiferromagnetic magnetic moment orientation. In antiferromagnetic insulators information can be transported by spin currents without Joule heating, thus being promising for applications where low power dissipation is important. We thus investigated spin switching and transport primarily in particularly low damping insulating antiferromagnetic materials. Our key goals have been (i) To develop and employ an all-electrical read-out and control of the antiferromagnetic magnetic moments, potentially paving the way to store magnetic information in this class of materials. (ii) To achieve and study long distance spin current transport in antiferromagnets, potentially enabling information transport with low dissipation.

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

Цел на проекта

Magnetic materials and devices play a tremendous role in information technology to meet current societal challenges. Antiferromagnet (AFM) spintronics is considered as a disruptive approach, enabling scalable and efficient spintronic devices. Ultimate stability and speed, combined with recent observations, e.g. the enhancement of the spin current transport when a thin AFM layer is sandwiched between Yttrium Iron Garnet and Pt, and along with theoretical predictions of superfluid spin transport, indicate significant untapped potential of this class of materials. I tackle the key open questions on spin transport in AFMs: (i) To develop and employ an all-electrical read-out of the Néel vector. The Néel vector can be set, by studying AFMs across the spin-flop field, and then compared with the resulting magnetotransport signal. In collinear antiferromagnetic conductors, the anisotropic magnetoresistance/planar Hall effect will be used, while in these and others collinear AFMs, a read-out by the Spin-Hall Magneto-resistance (SMR) at the interface between the AFM and a heavy metal will be employed, e.g. in NiO/Pt and MnN/Pt. The SMR will be additionally correlated with direct imaging of the AFM domain structure, performed in synchrotrons. (ii) To explore a new writing method, based on the voltage control of magnetic properties, via the migration of oxygen ions, as demonstrated in ferromagnets, where the anisotropies can be tailored. (iii) To transport spin in antiferromagnets. By thermally generating spin currents via the spin Seebeck effect, I will study the transport in AFM metals and insulators. Temperature-dependent measurements allow us to ascertain the role of the different spin current magnon modes. Finally, the spin injection in NiO and the exciting predicted spin superfluidity in AFMs will be probed. This work is expected to be important, not only to understand the rich physics of spin transport in AFMs, but also toward using AFMs for novel spintronic devices.

Оригинален текст от CORDIS (на английски).

Участници

JOHANNES GUTENBERG-UNIVERSITAT MAINZ · MainzКоординаторГермания