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Strain dependent defect mediated ferromagnetism in Mn-doped and undoped ZnO thin films

DOI: 10.1063/1.3455856 DOI Help

Authors: Frank Schoofs (University of Cambridge) , Thomas Fix (University of Cambridge) , Ali M. R. H. Hakimi (University of Cambridge) , Sarnjeet S. Dhesi (Diamond Light Source) , Gerrit Van Der Laan (Diamond Light Source) , Stuart A. Cavill (University of York, Diamond Light Source) , Sean Langridge (ISIS, STFC Rutherford Appleton Laboratory) , Judith L. Macmanus-Driscoll (University of Cambridge) , Mark G. Blamire (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Applied Physics , VOL 108 (5) , PAGES 053911

State: Published (Approved)
Published: September 2010

Abstract: The structural and magnetic properties of pulsed laser deposited zinc oxide thin films have been investigated. Room temperature ferromagnetism is present in undoped as well as Mn-doped films. The saturation magnetization of the thin films reveals a dependence on both the composition and the out of plane lattice parameter. X-ray magnetic circular dichroism down to 2 K reveals a purely paramagnetic contribution from the Mn in Mn:ZnO films. We conclude that the observed ferromagnetism arises entirely from intrinsic defects in the ZnO which can be varied by manipulation of the lattice parameter.

Diamond Keywords: Ferromagnetism; Semiconductors; Spintronics

Subject Areas: Physics, Materials

Instruments: I06-Nanoscience

Added On: 01/10/2010 09:05

Discipline Tags:

Surfaces Quantum Materials Physics Electronics Magnetism Materials Science interfaces and thin films

Technical Tags:

Spectroscopy Circular Dichroism (CD) X-ray Absorption Spectroscopy (XAS) X-ray Magnetic Circular Dichroism (XMCD)