Jungiusstr. 11, Hörsaal AP
SFB 668 - Kolloquium
Dr. D. Sander (MPI, Halle):
New insights into nanomagnetism and superconductivity by low-temperature scanning tunneling microscopy
Spin-polarized scanning tunneling microscopy at low temperature (8 K)
and in high magnetic fields (6 T) is a powerful technique to investigate
magnetic properties of individual nanoscale objects ranging in size form
single atoms to several thousand atoms . I focus on the magnetization
reversal  and the spin-dependent electronic properties of Co  and
Fe-decorated Co islands  with some thousand atoms. The high spatial
resolution of the scanning tunneling spectroscopy reveals the
significance of structural and electronic relaxation  for the
magnetic anisotropy and the spin-dependent transport properties  of
single islands. In an outlook I present first results on
superconductivity of Pb monolayers and islands from our new STM, which
operates at 0.3 K in a vector magnetic field. Future work will focus on
investigations of the interplay between superconductivity and magnetism
on the nanoscale.
 H. Oka, O. Brovko, M. Corbetta, V. Stepanyuk, D. Sander, J. Kirschner,
Rev. Mod. Phys. *86* (2014), 1127.
 S. Ouazi, G. Rodary, S. Wedekind, H. Oka, D. Sander, J. Kirschner,
Phys. Rev. Lett. *108 *(2012) 107206.
 H. Oka, P. Ignatiev, S. Wedekind, G. Rodary, L. Niebergall, V.
Stepanyuk, D. Sander, J. Kirschner, Science *327* (2010) 843.
 S. Phark, J. Fischer, M. Corbetta, D. Sander, K. Nakamura, J.
Kirschner, Nat. Commun.*5*:5183 doi: 10.1038/ncomms6183 (2014).//
 O. Brovko, D. Bazhanov, H. Meyerheim, D. Sander, V. Stepanyuk, J.
Surface Science Reports*69* (2014) 159.
 H. Oka, K. Tao, S. Wedekind, G. Rodary, V. Stepanyuk, D. Sander, J.
Phys. Rev. Lett. *107* (2011) 187201.