On Wednesday 7th March 2018, our final year Physics students were kindly hosted by the world leading Cambridge Graphene Centre at the University of Cambridge. They got learn about ground breaking research taking place along with emerging applications of the this noble prize winning one dimensional material. The visit follows the lecture given by Dr Yarjan Samad (Cambridge Graphene Centre) at the University of Lincoln to our physic students on synthesis and application of graphene for gas sensing applications.
Today is International Women’s Day. In celebration of this yearly event, we met with some of our female students to find out the projects they’re undertaking as part of their studies at the School of Mathematics & Physics, University of Lincoln UK.
After being recognised for its commitment to advancing women’s careers in STEMM (Science, Technology, Engineering, Mathematics and Medicine), the University of Lincoln achieved a Bronze Award in 2014 as part of the Athena SWAN Charter.
In addition, the women in science, engineering and technology group (WiSE@Lincoln) was set up at the University in 2012 to coordinate and deliver sustained support, guidance, training and inspiration for the Lincoln women in science, engineering and technology. The WiSE group is overseen by the Eleanor Glanville Centre, an interdisciplinary centre for inclusion, diversity and equality at the University of Lincoln.
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On 24th of January 2018 Fiona Bissett had her graduation ceremony in Lincoln Cathedral. Fiona is our second graduate in the history of the school, and the first Master by Research. Her Master of Science by Research thesis “Computational study of the self-assembly of hypoxanthine in the gas-phase and on the Au(111) surface” was written under the supervision of Dr Manuela Mura. Fiona’s research was supported by the University of Lincoln’s Back to Science Fellowship.
On 23rd January Dr Andrew Caruana visited the physics department at the University of Lincoln. He gave a seminar for 3rd year physics students in the afternoon about his current role at ISIS as a beamline scientist. He introduced some of the techniques that are being used in his experiment (polarised neutron reflectivity) and why it is a useful for investigating many properties of a range of materials. Afterwards Dr Caruana moved on to some of his current research interests involving the spin Seebeck effect which he is working closely with collaborators at Loughborough University.
Dr Caruana also invited the students and members of staff to come and visit the institute and see the experiment he supports.
On 23rd January 2018 at 14:00 Dr Andrew Carauna will give a physics seminar in room INB3305. Below is the title, abstract and summary of Andrew’s work.
Studying the spin Seebeck Effect using Polarised Neutron Reflectivity
Thermoelectric generators (TEGs) are of increasing interest due to their potential use in energy harvesting of waste heat. The efficiency of such devices is often characterised by the thermoelectric figure of merit, zT, which is ultimately limited by the thermal and electric conductivities in conventional TEGs. The ideal TEG material should have a high electrical conductivity (to reduce resistive losses), and low thermal conductivity (so that a large temperature gradient can be setup across the device) for the optimisation of zT. However, these properties are intrinsically linked to one another, as best described by the Weidemann-Franz Law (κ=σL0T), thus providing a limit to the upper value of zT.
The spin Seebeck effect (SSE) may overcome this limitation. When a thermal gradient is applied to a magnetised ferromagnet (FM) it can induce a spin current, JS . By placing a heavy metal (NM) in contact with a FM material, JS can be converted to a charge current, JC, via the inverse spin hall effect (ISHE). Due to the separation of the active material (FM layer) and the electric circuit (NM layer) the FM layer can be chosen so that the thermal conductivity is minimised without affecting the electrical conductivity of the contact NM layer.
Polarised Neutron Reflectivity (PNR) provides information of the physical density and magnetic moment of a thin film or multilayer as a function of depth. Since PNR can probe buried interfaces, layer and interface parameters such as layer thickness, layer density, magnetic moment of the layer and the roughness at each interface can be determined. By the use of specific sample environment (magnets, cryostats, furnaces etc.), the depth profile of the magnetic moment can be probed under a variety of different conditions. In our recent work we have been investigating the magnetic depth profile of our SSE based devices when a thermal gradient is applied across the device, using a custom built thermal cell. In this talk, I will provide an introduction to the SSE, PNR and the POLREF beamline at ISIS and show our recent work using the in-situ SSE-thermal cell.
 L. E. Bell, Science, 321, 1457 (2008)
 K. Uchida et al, J. Phys. Condens. Matter, 26, 343202 (2014)
 A. Caruana et al, Phys. Status Solidi RRL 10, No. 8, 613–617 (2016)
About Dr Andrew Carauna:
Studied for an undergraduate masters MPhys in pure physics at Loughborough University (graduated 2010). Conducted an experimental PhD in physics on pulsed laser deposition (PLD) of oxide thin films (graduated 2015, Supervisor Dr Mike Cropper). I was a postdoc for 1 year working under Dr Kelly Morrison on the Spin Seebeck Effect (SSE), growing thin film SSE devices using PLD. I now work as an instrument scientist on the POLREF polarised neutron reflectometer at the ISIS Neutron and Muon Source. My main research interests lie in magnetic thin film devices for use in spintronics, i.e. the Spin Seebeck effect, specifically looking at interfacial effects on the induced spin pumping within these devices. Additionally, I am also interested in developing sample environment for in-situ measurement techniques on the beamline, i.e. in-situ SSE and ferromagnetic resonance/spin pumping.
We celebrate this event in Lincoln with a special Christmas Public Lecture: “Space travel: from fantasy to reality and beyond” given by a successful public speakers duo: Dr Anna Marie Roos and Dr Fabien Paillusson, a historian of science and a theoretical physicist.
Date: Wednesday 14th of June 2017, 14:00.
Location: INB3305 (Isaac Newton Building).
‘Cellular Graphene and its Applications’
by Yarjan Abdul Samad, Cambridge Graphene Centre, University of Cambridge.
Dr. Yarjan Abdul Samad is a research associate and a project leader at the Cambridge Graphene Centre, University of Cambridge. His research areas include electromechanical and electro and photo- thermal properties of carbon and two-dimensional materials, as well as flexible and stretchable composites for space, health, environment and energy applications. Dr. Abdul Samad has developed sustainable methods of fabricating e-textiles and flexible and stretchable conductors and composites based on porous 3D structures of layered materials – typically graphene – that are useful for aerospace composites, biosensing, water purification and energy storage. He is among the team of experimentalists who tested properties of graphene for the first time in Zero Gravity (Zero G) environments by using European Space Agency’s parabolic flights…
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On 14 November 2017 Fabien Paillusson gave a public talk “Does Mr Entropy need Pheonix Wright?” at Nottingham Physics Centre, … Read more via IOP talk in Nottingham – Theory of Complex Matter
There will be a physics seminar on Tuesday the 14th of November 2017, 14:00, in INB3305 (Isaac Newton Building): Forensic Physics by David Wilkinson, Midlands Regional Officer of the Institute of Physics.