Investigating the effects of antiferromagnetic order upon Tc in superconducting spintronic devices

Lead Research Organisation: University of Cambridge
Department Name: Materials Science & Metallurgy

Abstract

As a member of the Device Materials Group in the department of Materials Science and Metallurgy, my research will be conducted in the newly emerging field of superconducting spintronics. The existence of spin-triplet Cooper pairs at the interfaces of magnetic and superconducting systems and their ability to be spin-polarized has recently been discovered. It is hoped that long-range spin-polarized supercurrents may be used in spintronics as an alternative to the highly dissipative spin-polarized currents seen in current spintronic applications, and potentially as a replacement for traditional transistor-based silicon electronics in the long term. This will require significant investigation and development of devices that allow the manipulation and control of the spin, magnetic and superconducting states in a system. Initially, my research will focus on the growth of epitaxial thin-film antiferromagnets with differing surface-spin structures. I will then attempt to construct devices consisting of antiferromagnetic and superconducting layers in order to investigate the phenomena that emerge at the interface between these two types of material, and particularly to probe how the critical temperature of the superconductor changes when in contact with the various antiferromagnetic surfaces, which would indicate some control over the superconducting state of the system."

Publications

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Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/N509620/1 01/10/2016 30/09/2021
1796341 Studentship EP/N509620/1 01/10/2016 30/09/2020 Juliet Emma Thompson
 
Description Spin pumping into superconducting materials through Cr/Fe interfaces due to triplet pure spin supercurrent 
Organisation Imperial College London
Department Department of Physics
Country United Kingdom 
Sector Academic/University 
PI Contribution Growth and characterisation of Nb/Fe/Nb, Nb/Cr/Fe/Cr/Nb, and Nb/Cr/Py/Cr/Nb thin-film structures for study of spin pumping into Nb.
Collaborator Contribution Characterisation via FMR studies of Nb/Fe/Nb, Nb/Cr/Fe/Cr/Nb, and Nb/Cr/Py/Cr/Nb thin-film structures for study of spin pumping into Nb.
Impact Spin pumping into superconducting materials through Cr/Fe interfaces due to triplet pure spin supercurrent (manuscript in preparation).
Start Year 2019
 
Description Spin pumping into superconducting materials through Cr/Fe interfaces due to triplet pure spin supercurrent 
Organisation University College London
Department London Centre for Nanotechnology
Country United Kingdom 
Sector Academic/University 
PI Contribution Growth and characterisation of Nb/Fe/Nb, Nb/Cr/Fe/Cr/Nb, and Nb/Cr/Py/Cr/Nb thin-film structures for study of spin pumping into Nb.
Collaborator Contribution Characterisation via FMR studies of Nb/Fe/Nb, Nb/Cr/Fe/Cr/Nb, and Nb/Cr/Py/Cr/Nb thin-film structures for study of spin pumping into Nb.
Impact Spin pumping into superconducting materials through Cr/Fe interfaces due to triplet pure spin supercurrent (manuscript in preparation).
Start Year 2019
 
Description Demonstrator - 'Physics at Work' event at Cavendish Laboratory 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Schools
Results and Impact ~1800 students attend from ~50 schools nationally, visiting a variety of research groups. The presentation is an opportunity to introduce the field of materials science, and each speaker gets the opportunity to talk about their specific research. The event has run for many years, and schools report high enjoyment and interest in the presentation given by the group from materials science every year.
Year(s) Of Engagement Activity 2017,2018,2019
URL https://outreach.phy.cam.ac.uk/programme/physicsatwork
 
Description Poster Presentation - Department of Materials Science and Metallurgy Open Day 
Form Of Engagement Activity Participation in an open day or visit at my research institution
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Postgraduate students
Results and Impact Postgraduate open day 2019 at the department of materials science and metallurgy aimed to give prospective students and overview of the research conducted in the department, and tours of the laboratory facilities. There was a poster presentation session, in which specific research projects were discussed, sparking further questions and interest in the subject.
Year(s) Of Engagement Activity 2019
URL https://www.msm.cam.ac.uk/news-and-events/events/postgraduate-open-day-2019
 
Description Volunteer/Demonstrator - Science Festival - University of Cambridge 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact The Cambridge Science Festival is held annually, with 1000s of demonstrations/talks/lectures across all subjects. The Device Materials Group in the Materials Science department gave presentations to the general public about their subject area, and introduced the public to cryogenic science in particular.
Year(s) Of Engagement Activity 2017
URL https://www.sciencefestival.cam.ac.uk/