A Platform to Develop and Utilise Characterisation Tools for Functional Magnetic Materials
Lead Research Organisation:
Imperial College London
Department Name: Physics
Abstract
Magnetic materials have played an increasingly important role in our society. The Functional Magnetic Materials Group at Imperial College have developed a suite of novel characterisation tools over recent years. This proposal describes how with proper support we could utilise these tools to best effect in the study of materials important for application and develop key new tools as appropriate. The materials we aim to study during the course of the Platform grant fall into four main areas a) ultrathin film narrow gap semiconductors for magnetic sensor technology; b)superconducting materials for low field portable MRI technology; c) materials that allow the harnessing of electron spin d) materials for 300K magnetic refrigeration. The first areas are very much a part of what the group are currently doing however we want to incorporate the new elements such as strain measurements in our Hall probe and point contact facilities and nanoscale sensor fabrication. Our forward look for the group is in the areas of Spintronics and Magnetocalorics. In Spintronics we plan to develop new tools to harness and exploit spin in electrical materials mainly narrow gap semiconductors. Here again there will be an emphasis on nanofabrication of devices. Magnetocalorics is a very new area for the group and a very exciting one. Our characterisation capability is ideally suited to making a really important novel contribution here, particularly with access to higher resolution sensors that will come out of other parts of the program. Overall the group is well connected to a network of international collaborators and many of these have written letters of support for this proposal. It would be our aim to use the Platform in part to strengthen these links as well as seed new collaborations and explore new avenues for funding in Europe and with industrial collaborators.
People |
ORCID iD |
Lesley Cohen (Principal Investigator) |
Publications
Brett DJ
(2010)
What happens inside a fuel cell? Developing an experimental functional map of fuel cell performance.
in Chemphyschem : a European journal of chemical physics and physical chemistry
Chattopadhyay M
(2008)
Visual evidence of the magnetic glass state and its re-crystallization in Gd 5 Ge 4
in EPL (Europhysics Letters)
Kazakova O
(2010)
Ultrasmall particle detection using a submicron Hall sensor
in Journal of Applied Physics
Staunton J
(2013)
Tuning the metamagnetism of an antiferromagnetic metal
in Physical Review B
Staunton J
(2012)
Tuning the metamagnetism of an antiferromagnetic metal
Li J
(2012)
Transverse focusing of spin-polarized photocurrents
in Physical Review B
Moore J
(2007)
The superconducting properties of co-doped polycrystalline MgB 2
in Superconductor Science and Technology
Yates K
(2007)
The spin polarization of CrO2 revisited
in Applied Physics Letters
Boldrin D
(2017)
The role of competing magnetic interactions on the abnormal expansion properties in manganese antiperovskites, Mn 3+x A 1-x N ( A = Ni, Sn)
in Journal of Alloys and Compounds
Zeissler K
(2013)
The non-random walk of chiral magnetic charge carriers in artificial spin ice
in Scientific Reports
Morrison K
(2010)
The magnetocaloric performance in pure and mixed magnetic phase CoMnSi
in Journal of Physics D: Applied Physics
Waske A
(2016)
The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe 11.8 Si 1.2
in APL Materials
Moore J
(2009)
The effect of columnar defects on the pinning properties of NdFeAsO 0.85 conglomerate particles
in Superconductor Science and Technology
Branford W
(2007)
Temperature insensitivity of the spin-polarization in Co 2 MnSi films on GaAs (001)
in New Journal of Physics
Chattopadhyay M
(2012)
Study of the dynamical features of the austenite-martensite phase transition in the Ni50(Mn, 1%Fe)34In16 alloy using scanning Hall probe imaging
in Journal of Applied Physics
Ortiz M
(2008)
Structural and Microanalytical Studies of CrO 2 Thin Films on c-Sapphire by High Resolution Electron Microscopy Methods
in Microscopy and Microanalysis
Adamopoulos G
(2010)
Spray-Deposited Li-Doped ZnO Transistors with Electron Mobility Exceeding 50 cm 2 /Vs
in Advanced Materials
Yates K
(2009)
Spin-polarized transport current in n -type codoped ZnO thin films measured by Andreev spectroscopy
in Physical Review B
Litvinenko K
(2007)
Spin Dynamics in Narrow-Gap Semiconductor Epitaxial Layers
in Journal of Superconductivity and Novel Magnetism
Basso V
(2015)
Specific heat and entropy change at the first order phase transition of La(Fe-Mn-Si)13-H compounds
in Journal of Applied Physics
Moseley D
(2015)
Signatures of filamentary superconductivity in antiferromagnetic BaFe 2 As 2 single crystals
in EPL (Europhysics Letters)
Turcaud J
(2015)
Quantifying the deleterious role of strong correlations in La 1 - x Ca x MnO 3 at the magnetocaloric transition
in Physical Review B
Li J
(2012)
Observation of spin dependent photocoductivity in InSb quantum well nanowires
in Applied Physics Letters
Lyubina J
(2012)
Novel La(Fe,Si) 13 /Cu Composites for Magnetic Cooling
in Advanced Energy Materials
Gilbertson A
(2015)
Multifunctional semiconductor micro-Hall devices for magnetic, electric, and photo-detection
in Applied Physics Letters
Ladak S
(2011)
Monopole defects and magnetic Coulomb blockade
in New Journal of Physics
Turcaud J
(2013)
Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3±d
in Scripta Materialia
Morrison K
(2008)
Measurement of the magnetocaloric properties of CoMn 0.95 Fe 0.05 Si : Large change with Fe substitution
in Physical Review B
Morrison K
(2012)
Magnetic refrigeration: phase transitions, itinerant magnetism and spin fluctuations
in Philosophical Magazine
Lovell E
(2016)
Low-temperature specific heat in hydrogenated and Mn-doped La ( Fe , Si ) 13
in Physical Review B
Gilbertson A
(2007)
Low-temperature Schottky barrier tunneling in In Sb / In x Al 1 - x Sb quantum well heterostructures
in Physical Review B
Moore J
(2008)
Local probing of arrested kinetics in Gd 5 Ge 4
in Journal of Physics: Condensed Matter
Porcari G
(2015)
Influence of thermal conductivity on the dynamic response of magnetocaloric materials
in International Journal of Refrigeration
Pires A
(2015)
Influence of short time milling in R5(Si,Ge)4, R = Gd and Tb, magnetocaloric materials
in Materials & Design
Turcaud J
(2015)
Influence of manganite powder grain size and Ag-particle coating on the magnetocaloric effect and the active magnetic regenerator performance
in Acta Materialia
Duboviks V
(2013)
In-Operando Raman Spectroscopy Study of Passivation Effects on Ni-CGO Electrodes in CO 2 Electrolysis Conditions
in ECS Transactions
Maher R
(2013)
In-Operando Raman Characterization of Carbon Deposition on SOFC Anodes
in ECS Transactions
Morrison K
(2013)
Identifying the critical point of the weakly first-order itinerant magnet DyCo 2 with complementary magnetization and calorimetric measurements
in Physical Review B
Bratko M
(2012)
History dependence of directly observed magnetocaloric effects in (Mn, Fe)As
in Applied Physics Letters
Miyoshi Y
(2008)
Heat capacity and latent heat measurements of CoMnSi using a microcalorimeter.
in The Review of scientific instruments
Yates K
(2008)
Extracting the diffusivity ratio from point contact Andreev reflection spectroscopy and upper critical field measurements in MgB 2
in Journal of Physics: Conference Series
Usman I
(2011)
Evidence for spin mixing in holmium thin film and crystal samples
in Physical Review B
Branford WR
(2012)
Emerging chirality in artificial spin ice.
in Science (New York, N.Y.)
Lyubina J
(2012)
Electrolytic hydriding of LaFe(13-x)Si(x) alloys for energy efficient magnetic cooling.
in Advanced materials (Deerfield Beach, Fla.)
Salem-Sugui S
(2017)
Effects of proton irradiation on flux-pinning properties of underdoped Ba(Fe0.96Co0.04)2As2 pnictide superconductor
in Journal of Alloys and Compounds
Description | This grant was a platform grant designed to enable the group to develop bespoke characterisation tools for magnetic materials. We developed an ac calorimeter that was transferred to a UK based company, and Hall probe scanner that is still under discussion regarding transfer to a company for commercial use. Apart from these measurable impacts the tools developed within the grant enabled us to provide insight into the development of new materials for magnetocalorics, for energy efficient magnetic solid state cooling (or heating) applications. |
Exploitation Route | We have worked with a number of companies in the area of magnetocalorics to help them to characterise their materials and develop new materials. |
Sectors | Electronics,Energy |
URL | https://www.imperial.ac.uk/people/l.cohen/research.html |
Description | This platform grant facilitated our research into a number of new areas related to electronic materials, sensors and magnetic solid state cooling. |
First Year Of Impact | 2009 |
Sector | Energy |
Description | EPSRC |
Amount | £401,242 (GBP) |
Funding ID | EP/F065922/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 09/2008 |
End | 08/2011 |
Description | EPSRC |
Amount | £611,749 (GBP) |
Funding ID | EP/J014699/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 11/2012 |
End | 10/2015 |
Description | EPSRC |
Amount | £98,621 (GBP) |
Funding ID | EP/F016271/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 08/2008 |
End | 09/2011 |
Description | EPSRC |
Amount | £445,842 (GBP) |
Funding ID | EP/H040048/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 04/2010 |
End | 03/2013 |
Description | EPSRC |
Amount | £3,863,046 (GBP) |
Funding ID | EP/G060940/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 10/2009 |
End | 03/2015 |