Antiferromagnetic coupling of TbPc2 molecules to ultrathin Ni and Co films

Beilstein Journal of Nanotechnology

卷:4

Roberto Biagi¹  Marco Affronte¹  Valdis Corradini¹  Umberto del Pennino¹  Andrea Candini¹  Valentina de Renzi¹  Kurt Kummer²  Bernhard Krumme³  David Klar³  Heiko Wende³  Svetlana Klyatskaya⁴  Mario Ruben⁴  Philippe Ohresser⁵  Loic Joly⁶  Jean-Paul Kappler⁶ 

[1] Centro S3, Istituto Nanoscienze - CNR, via Campi 213/a, I-41125 Modena, Italy;

[2] ESRF, 6 rue Jules Horowitz, BP 220, F-38043 Grenoble Cedex, France;

[3] Faculty of Physics and CENIDE, University Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany;

[4] Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany;

[5] Synchrotron SOLEIL, L′Orme des Merisiers, Saint-Aubin - BP 48, 91192 Gif-sur-Yvette, France;

[6] Universite de Strasbourg, Institut de Physique et de Chimie des Materiaux de Strasbourg, CNRS UMP 7504, 23 Rue du Loess, 67034 Strasbourg Cedex 2, France;

关键词: magnetic anisotropy;    magnetic coupling;    single molecule magnets;    X-ray absorption spectroscopy;   

DOI  :  10.3762/bjnano.4.36

来源: DOAJ

【 摘 要 】

The magnetic and electronic properties of single-molecule magnets are studied by X-ray absorption spectroscopy and X-ray magnetic circular dichroism. We study the magnetic coupling of ultrathin Co and Ni films that are epitaxially grown onto a Cu(100) substrate, to an in situ deposited submonolayer of TbPc2 molecules. Because of the element specificity of the X-ray absorption spectroscopy we are able to individually determine the field dependence of the magnetization of the Tb ions and the Ni or Co film. On both substrates the TbPc2 molecules couple antiferromagnetically to the ferromagnetic films, which is possibly due to a superexchange interaction via the phthalocyanine ligand that contacts the magnetic surface.

【 授权许可】

Unknown