H2020Индивидуална стипендия2015–2017

OrganoMag · Organometallic Single-Molecule Magnets

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

Период: 2015-10-01 → 2017-09-30
Финансиране от ЕС: 183 455 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Едномолекулните магнити се изследват с цел да работят при по-високи температури, например при 77 K (температурата на течния азот). Това е важно за развитието на системи за съхранение на информация с много висока плътност.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Organometallic Single-Molecule Magnets

Due to the inherent molecular spin-inversion barrier, single-molecule magnets (SMMs) exhibit slow magnetic relaxation for a long time at low temperature, suggesting possible applications in high-density information storage. Remarkable progress with SMMs has occurred, and now the important challenge is to address the temperature regime in which they function. The highest temperature at which an SMM displays magnetic hysteresis is the blocking temperature (TB): the state-of-the-art SMM has a blocking temperature of only 14 K, and most SMMs show very little hysteresis above liquid helium temperatures. The big challenge is, therefore, to raise TB to practically useful levels: the ultimate goal is to develop room-temperature SMMs, however, SMMs that function at 77 K, the temperature at which nitrogen liquefies, would represent an enormous step forward. The main objective of this object is to create SMMs that function at unprecedented temperatures. The project will expand the frontiers of a multidisciplinary field, resulting in the impact on chemistry, molecular magnetism, materials science, and condensed matter physics.

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

Цел на проекта

In this project, we will develop new single-molecule magnets (SMMs) that combine the strong magnetic anisotropy of lanthanide ions with a series of novel radical ligands. Highly unusual di- and tri-metallic Ln-SMMs are proposed in which the metals are bridged by radicals with heavy Group 15 donor atoms (i.e. the pnictogens, phosphorus-bismuth). The SMM field is dominated by systems with diamagnetic ligands: our radical ligands are novel, hence their applications in single-molecule magnetism will be unprecedented. We will exploit the rich electrochemistry of the proposed ligands: our DFT calculations show that the target heavy pnictogen radical anions have huge spin densities on the donor atoms, hence the diffuse unpaired spin of the radicals will provide a way of switching off the quantum tunnelling mechanisms that otherwise prevent hysteresis. Ultimately, this project introduces the potential for creating SMMs that show hysteresis at unprecedentedly high temperatures.

Оригинален текст от CORDIS (на английски).

Участници

THE UNIVERSITY OF MANCHESTER · ManchesterКоординаторОбединеното кралство