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Details of Grant 

EPSRC Reference: EP/S018824/1
Title: Ultrafast spin dynamics in molecular magnets
Principal Investigator: Johansson, Dr JO
Other Investigators:
Evans, Dr RFL
Researcher Co-Investigators:
Project Partners:
Jagiellonian University
Department: Sch of Chemistry
Organisation: University of Edinburgh
Scheme: New Investigator Award
Starts: 01 January 2019 Ends: 31 December 2020 Value (£): 257,664
EPSRC Research Topic Classifications:
Condensed Matter Physics Light-Matter Interactions
Magnetism/Magnetic Phenomena
EPSRC Industrial Sector Classifications:
No relevance to Underpinning Sectors
Related Grants:
Panel History:
Panel DatePanel NameOutcome
24 Oct 2018 EPSRC Physical Sciences - October 2018 Announced
Summary on Grant Application Form
The project has a large potential to create impact in a number of academic fields because of the disruptive nature of the research - no one has applied ultrafast magneto-optics to study molecular magnets. These areas are described below.

Ultrafast magnetism: Our methods can be extended to study single molecule magnets, which offer a unique opportunity to study the dynamics of the exchange interaction in new environments and in smaller, discrete systems that can be directly compared to high-level computational methods, which is not possible for many solid-state systems.

Molecular magnetism: This research project will lead to new avenues of synthetic chemistry research in order to optimise properties to achieve efficient spin switching. The preparation of thin films for both optical and magnetic measurements will also contribute to the field because non-destructive magneto-optical measurements are important for characterisation of thin magnetic films.

Chemical physics/spectroscopy and dynamics: The research will investigate fast intersystem crossing in transition metal complexes and materials. This is one of the most studied problems in contemporary chemical physics. In contrast to bulk magnetic materials, most of the studies on isolated transition metal complexes have relied on indirect measurements of the spin dynamics, by recording changes to optical spectra or bond lengths (via IR). In this proposal, we will use fs magneto-optical techniques, which are directly sensitive to the spin dynamics. We can do this because we are studying magnetically ordered molecular materials. This is a novel approach and our findings will therefore have an impact of spectroscopy and dynamics.

The interdisciplinary aspect of the project therefore requires a large effort to make sure that the findings do not go unnoticed by the various communities involved. The main sources for creating impact are to attend and organise conferences, publish in general-audience high-impact journals, and collaborating with researchers in a wide range of areas.

Collaborations: By collaborating with the co-Is on this project, we will get exposure to both of the main fields of this proposal. R. Evans (RE) is active in the ultrafast magnetism community and will organise the next Ultrafast Magnetism Conference in York in 2019. D. Pinkowicz (DP) is involved in the COST action MolSpin and we will exploit these connections to expand the impact of our work. We plan to carry out additional measurements at various national and international facilities, such as time-resolved electron diffraction. The PI is coordinating and leading these collaborations, which will ensure that the research gets international exposure.

Conference organisation: The PI will organise a two-day satellite workshop in Edinburgh in Sep. 2019 in connection to the Ultrafast Magnetism Conference taking place in York. We will discuss current problems and the best way forward to optically address molecular magnets by combining speakers from synthetic chemistry, condensed matter physics and both theory and experiments. By organising the conference, we will ensure that our leadership in the field gets attention.

Publish high-impact journals: We expect to publish at least one high-impact paper on spin dynamics in Cr-based PBAs and follow up with a more detailed paper in a specialised journal. The observation of transition from paramagnet to ferromagnetic state of the FeNb photmagnet will lead to a high impact paper, for example in one of the Nature journals. We will also publish a paper on sample preparation for thin films of this important material. There will also be a separate paper on the computational methods developed by RE.

Conference attendance: The PI and PDRA will attend several conferences in the different areas, such as magnetism (IOP magnetism, Ultrafast magnetism conference), molecular magnetism (ICMM), and photophysics (ISPPCC).
Key Findings
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