SPring-8, the large synchrotron radiation facility

Date: 14:00-15:00　June8, 2007

Place: Auditorium in the central building

Speaker: Hendrik Ohldag

Affiliation: Stanford Synchrotron Radiation Laboratory, Stamford University,Stanford CA

Title: X-rays and Magnetism - A Perfect Match

Abstract:
One of the driving forces of today's magnetism research is the magnetic storage industry. Of interest are sandwiched magnetic sensors, spin valves, spin transistors and magnetic media consisting of ferromagnetic thin films and multilayer systems that can store information in nano-sized bits. Scientific investigations in this area are concerned with the origin of magnetic coupling, spin transport across interfaces, magnetic properties of magnetic oxides, the complex magnetic structures which evolve when different kind of magnets for example antiferromagnets and ferromagnets are brought into contact. The power of dichroism x-ray absorption is that it provides the possibility to address the magnetic properties of different materials at the same time. It requires a source of tunable soft x rays with high brilliance and full polarization control which is given by today’s state of the art synchrotron radiation sources. Furthermore modern full field or scanning x-ray or photoemission microscopes - providing a spatial resolution of currently about 50nm - may be employed if one is interested in small structures. Finally, it is also possible to make use of the pulsed nature of the synchrotron source and study the time dependent behavior of a sample with a temporal resolution of a few to tens of picoseconds.　

Organizer: KINOSHITA (PHS 3129)