Towards understanding and controlling ultrafast dynamics in molecular photomagnets
Towards understanding and controlling ultrafast dynamics in molecular photomagnets
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DOI：
10.1016/j.ccr.2023.215346
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发表时间：
2023
影响因子：
20.6
通讯作者：
T. Penfold;J. Johansson;Julien Eng
中科院分区：
文献类型：
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作者：
T. Penfold;J. Johansson;Julien Eng
操纵磁性材料是硬盘技术的基石。这个现代信息技术时代导致了数据生成和存储速率的爆炸性增长，迫切需要实现新一代更快、更高效的数据存储设备。超快飞秒激光器的发展创造了利用超短光脉冲控制材料磁性的可能性，因此超快磁化动力学的研究已成为最活跃的磁性领域之一，受到基础和技术兴趣的推动。然而，这一领域的一个主要挑战是了解负责的微观机制。实际上，在与超短激光脉冲相互作用时引发的激发态动力学的特征在于电子、振动和自旋自由度之间的强耦合。这是特别相关的单分子磁体的情况下，这是本次审查的重点，由于高密度的电子激发态和密集的多方面的自旋状态的能量范围内的利益。在这篇文章中，我们讨论了最近的实验和理论发展，试图理解和控制与分子光磁体相关的超快动力学，并探索它们提供的新机会，以及概述了这一领域所需的一些未来发展。
Manipulating magnetic materials is the cornerstone of hard drive technology. This modern information technologyerahas led to an explosive increase in the rate of data generation and storage creating an urgent need to achieve a new generation of faster and more efficient data storage devices. The development of ultrafast femtosecond lasers created the possibility to control the magnetic properties of materials using ultrashort pulses of light and therefore the study of ultrafast magnetisation dynamics has become one of the most active fields of magnetism driven by both fundamental and technological interest. However, a major challenge in this field is understanding the microscopic mechanisms responsible. Indeed, excited state dynamics initiated upon interaction with ultrashort laser pulses are characterised by a strong coupling between the electronic, vibrational and spin degrees of freedom. This is especially pertinent for the case of single-molecule magnets, which are the focus of this review, due to the high density of electronically excited states and the dense manifold of spin states within the energy range of interest. In this contribution, we discuss recent experimental and theoretical developments seeking to understand and control the ultrafast dynamics associated with molecular photomagnets and explore the new opportunities they offer as well as outlining some future developments required in this field.