1. Institute of Materials Science and EngineeringTechnische Universität Ilmenau Gustav-Kirchhoff-Str. 6 98693 ILMENAU FEDERAL REPUBLIC OF GERMANY
2. Technische Universität Ilmenau, Institute of Physics and Institute of Micro- and Nanotechnologies, Department Gustav-Kirchhoff-Str. 7 98693 ILMENAU GERMANY
3. European Organization for Nuclear Research, CERN 1211 /GENEVA 23 SWITZERLAND