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Details of Grant 

EPSRC Reference: EP/C526546/1
Title: Probing the electronic, magnetic and structural properties of ferromagnetic semiconductors
Principal Investigator: Gallagher, Professor B L
Other Investigators:
van der Laan, Professor G Edmonds, Dr K Johal, Dr T
Foxon, Professor CT Campion, Dr RP
Researcher Co-Investigators:
Project Partners:
Department: Sch of Physics & Astronomy
Organisation: University of Nottingham
Scheme: Standard Research (Pre-FEC)
Starts: 01 April 2005 Ends: 31 March 2007 Value (£): 53,796
EPSRC Research Topic Classifications:
Materials Characterisation
EPSRC Industrial Sector Classifications:
Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
Semiconductor spintronics is a rapidly expanding field which aims to exploit the spin as well as the charge of electrons in a new generation of fast, low dissipation, non-volatile integrated information storage and processing devices. The dilute ferromagnetic semiconductors, in which ferromagnetism is intrinsic to the host semiconductor, present new opportunities in this field due to their unique combination of magnetic, semiconducting, and optical properties, and compatibility with existing microelectronics technology.This proposal is for a programme of synchrotron-based studies which aims to firmly establish the nature of the observed ferromagnetism in doped arsenide, nitride and oxide semiconductors, and the effect of nanoscaling on their physical properties. The project will bring together two groups with internationally leading expertise respectively in ferromagnetic semiconductor growth and characterisation, and x-ray magnetic dichroism measurements and theory. We will utilise a range of x-ray magnetic spectroscopy techniques to directly probe the electronic and magnetic properties of the magnetic impurities. We will also develop a combined magnetic linear dichroism and x-ray standing wave technique, as a qualitatively new approach to determining dopant incorporation and the site-dependence of magnetic coupling. Over 80 shifts of beamtime have already been awarded for the next allocation periods at the European Synchrotron Radiation Facility and the Advanced Light Source for these studies.Our recent work on (Ga,Mn)As has led to improved materials with world record ferromagnetic transition temperatures, and major advances in the understanding of their magnetic and magneto-transport properties. We have also observed room temperature ferromagnetism in Zn(Mn,Co)O and (GaMn)N and achieved record levels of p-type doping in the latter system. The proposed studies will build on these achievements to establish the detailed nature of the Mn and hole states in these material systems.
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Organisation Website: http://www.nottingham.ac.uk