Static and dynamic local magnetic fields for positioning and controlled movement of small objects

Datum

22.02.2013

Zeit

14:30 - 15:30

Sprecher

Prof. Dr. Arno Ehresmann

Zugehörigkeit

Institut für Physik und Centre for Interdisciplinary Nanostructure Science and Technology (CINSaT)

Sprache

en

Hauptthema

Materialien

Andere Themen

Materialien, Physik

Host

Ulrike Steere

Beschreibung

Artificial magnetic domain patterns can be fabricated in exchange biased bilayers and some other magnetic multilayer systems by ion bombardment induced magnetic patterning (keV He+ ion bombardment in combination with resist masks and an applied magnetic field during the bombardment). This technique enables a local modification of, e.g., the exchange bias field in magnitude and in direction. Remanently stable magnetic patterns (artificial domains) may be created without large changes in surface topography. These patterns allow also a tailoring of the associated magnetic strayfield landscapes. The talk will discuss the basics for fabricating such artificial domain patterns and the use of the associated stray field landscapes for positioning of molecules, of superparamagnetic micro- and nanoparticles, the controlled movement of superparamagnetic particles by moving domain walls and the influence of magnetic stray fields on the wrinkling of molecular glasses. .

Links

• Seminars at the IFW

Letztmalig verändert: 22.02.2013, 08:40:52