Developing x-ray scattering studies of magnetic materials
Lead Research Organisation:
University of Warwick
Department Name: Physics
Abstract
The purpose of this project is the study of magnetic properties of magnetic materials. It will exploit x-ray scattering methods to study both the itinerant and local moments in these systems. One of the objectives is to exploit the new capabilities available for high field spin-polarised Compton scattering experiments at the European Synchrotron Radiation Facility (ESRF): measurements will be possible in magnetic fields of up to 9 Tesla, increased from the previous maximum of 1T. This will vastly increase the range of problems that can be addressed using the technique. Firstly, it means metamagnetic systems can be studied where the transition is at a field greater than 1T, and secondly, it can greatly increase the measurement's sensitivity in many systems, since this is proportional to the square of the induced magnetic moment.Another important objective is the development of the methods used to interpret the experimental data. Presently, these data are compared with theoretical calculations. The proposed step forward is to use the experimental data inconjunction with the theory to tune the theoretical predictions subject to the constraints provided by the experimental results. This will enable us to learn much more about the theoretical calculations and the electronic properties underlying the observed experimental results.
People |
ORCID iD |
Jon Duffy (Principal Investigator) |
Publications
San Martin D
(2012)
Real-time synchrotron X-ray diffraction study on the isothermal martensite transformation of maraging steel in high magnetic fields
in Journal of Applied Crystallography
Duffy J
(2013)
What we can learn from magnetic Compton scattering: application to the determination of spin polarization
in Journal of Physics: Conference Series
Haynes T
(2012)
Positron annihilation study of the Fermi surface of Ni 2 MnGa
in New Journal of Physics
Butchers M
(2015)
Determination of spin and orbital magnetization in the ferromagnetic superconductor UCoGe
in Physical Review B
Utfeld C
(2010)
Bulk electronic structure of optimally doped Ba ( Fe 1 - x Co x ) 2 As 2
in Physical Review B
Duffy J
(2010)
Spin and orbital moments in Fe 3 O 4
in Physical Review B
Haynes T
(2012)
Ferrimagnetism in Fe-rich NbFe 2
in Physical Review B
Giblin SR
(2012)
Measurement of magnetic exchange in ferromagnet-superconductor La2/3Ca1/3MnO3/YBa2Cu3O7 bilayers.
in Physical review letters
Description | This research project involved combining experimental high energy X-ray scattering measurements with theoretical work in the study of the physics that underlies magnetism in ferromagnetic materials. The overall objective of this research was to develop new ways to provide interpretation of the results obtained from the measurements, by using the experimental results to inform the choice of physical parameters used in the theoretical work. Hence, our experimental results enable us to develop our understanding the important physics responsible for the properties of the materials studied. This approach should be applicable to further research. |
Exploitation Route | In further theoretical work applied to the electronic structure, especially in strongly correlated systems. |
Sectors | Electronics |