H2020Индивидуална стипендия2020–2022

SPEC · Spin-Phonon interaction for Energy Conversion

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

Период: 2020-09-15 → 2022-09-14
Финансиране от ЕС: 172 932 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Взаимодействието между магнитните вълни (магнони) и трептенията на кристалната решетка (фонони) се изучава чрез ферримагнитни оксиди. Това помага за подобряване на управлението на топлината и превръщането ѝ в енергия в микроелектрониката, където прегряването е сериозен проблем.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Spin-Phonon interaction for Energy Conversion

Heat dissipation in microelectronic and information processing technologies is a fundamental problem that is increasingly aggravated by the reduction of the transistor dimensions, the increases in packing density and the amount of data. Therefore, fundamental breakthroughs beyond CMOS technologies and heat management strategies are important challenges that need to be faced for the sustainable development of a knowledge-based society. The exploration of spin-based devices exploiting novel mechanisms has been identified as one of the possible routes to explore. In this context, the study of insulator spintronics has great potential. Since magnetic insulators can offer lower heat dissipation due to the absence of charge carriers and their associated heat losses, in this systems the information is carried by the excitations of the magnetic order (also known as magnons), which generate spin currents that propagate through the system. These spin currents can be exploited for thermoelectric conversion in the spin Seebeck effect (SSE). Moreover, magnetic insulators can offer a wide range of new functionalities due to the mutual interaction between several degrees of freedom: electronic, magnetic and lattice. The overall objective of the project is to explore effects associated with the interaction of the spin and lattice excitations (i.e. magnon-phonon interaction) to investigate their potential for magnetic field control of heat currents as well as their contribution to thermoelectric conversion and possible enhancement of the SSE. We have investigated the SSE in ferrimagnetic oxides with different degrees of magnetic compensation (i.e. total level of magnetization after summing up all the contributions from the different spin lattices of the ferrimagnet). By studying the effect of the magnon-phonon interaction on the SSE, we characterized the magnetic state of each investigated oxide (estimated the degree of magnetic compensation). We observed that the magnetic compensation has a significant impact on the magnetic field dependence of the SSE, possibly allowing for a magnetic field control of the thermoelectric conversion in these systems.

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

Цел на проекта

Heat dissipation is one of the great challenges for microelectronic and information technologies, which is aggravated by the reduction of the transistor dimensions and the increases in packing density and amount of data. Therefore, beyond CMOS technologies and heat management strategies are important challenges that need to be faced for the sustainable development of a knowledge-based society. The exploration of spin-based devices exploiting novel mechanisms is one of the possible routes to explore. In particular, insulator spintronics has great potential. Since magnetic insulating materials (mostly transition metal oxides, TMO) can offer lower heat dissipation due to the absence of charge carriers and no Joule heating losses. Moreover, TMO can offer new functionalities due to the mutual interaction between several degrees of freedom: electronic, magnetic, lattice. One example; is the spin-lattice interaction which has recently gained increased attention.In this present proposal, I will explore magnon-phonon interaction effects in suitable magnetic insulating materials to investigate their potential for magnetic-field-controlled heat-rectification effects, as well as their contribution to spin-based thermoelectric conversion phenomena (spin Seebeck effect).I will carry out the proposed research under the supervision of Prof. F. Rivadulla at CIQUS-USC and secondments in the group of Prof. M. Klaui at JGU-Mainz, thereby making use of the complementary expertise and stablishing a collaborative work environment between both institutions. Moreover, the experience I acquired during the last 5 years in Prof. Saitoh laboratory at Tohoku University will be critical for the success of this project, placing me in an unbeatable moment to tackle this ambitious research.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSIDAD DE SANTIAGO DE COMPOSTELA · Santiago De CompostelaКоординаторИспания