X-ray magnetic circular dichroism study of multiferroic and dilute magnetic materials
Virendra Kumar Verma · 2012
Spintronics materials like multiferroics and dilute magnetic semiconductors (DMSs) have attracted a great deal of attention in the scientific community from the viewpoints of both academic research and practical applications. In order to elucidate the origin of ferromagnetism of these spintronics materials, it is necessary to investigate the electronic structure. Advances in experimental techniques such as synchrotron radiation and electron spectroscopies provide us with great opportunities to unravel the underling physics producing the magnetic properties of the materials. In this thesis, I have investigated the electronic structure of spintronics materials using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD). Recently, thin films consisting of alternating ferrimagnetic spinel-type NiFe2O4 (NFO) and ferroelectric perovskite-type