Web of Science: 43 cites, Scopus: 45 cites, Google Scholar: cites
Coupling of single, double, and triple-decker metal-phthalocyanine complexes to ferromagnetic and antiferromagnetic substrates
Lodi Rizzini, Alberto (Institut Català de Nanociència i Nanotecnologia)
Krull, Cornelius (Institut Català de Nanociència i Nanotecnologia)
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia)
Balashov, Timofey (Institut Català de Nanociència i Nanotecnologia)
Nistor, Corneliu (ETH Zürich. Department of Materials)
Piquerel, Raoul (Institut Català de Nanociència i Nanotecnologia)
Klyatskaya, Svetlana (Karlsruhe Institute of Technology. Institute of Nanotechnology)
Ruben, Mario (Karlsruhe Institute of Technology. Institute of Nanotechnology)
Sheverdyaeva, Polina (Consiglio Nazionale Delle Ricerche. Istituto di Struttura della Materia)
Moras, Paolo (Consiglio Nazionale Delle Ricerche. Istituto di Struttura della Materia)
Carbone, Carlo (Consiglio Nazionale Delle Ricerche. Istituto di Struttura della Materia)
Stamm, Christian (ETH Zürich. Department of Materials)
Miedema, Piter (Utrecht University. Debye Institute of Nanomaterials Science)
Thakur, Pardeep K. (European Synchrotron Radiation Facility)
Sessi, Violetta (European Synchrotron Radiation Facility)
Soares, Marcio (European Synchrotron Radiation Facility)
Yakhou-Harris, Flora (European Synchrotron Radiation Facility)
Cezar, Julio C. (European Synchrotron Radiation Facility)
Stepanow, Sebastian (Department of Materials, ETH Zürich)
Gambardella, Pietro (Institut Català de Nanociència i Nanotecnologia)

Data: 2014
Resum: We report a survey of the magnetic properties of metal-organic complexes coupled to ferromagnetic and antiferromagnetic surfaces. Using element-resolved X-ray magnetic circular dichroism, we investigate the magnetism of single, double, and triple-decker phthalocyanines focusing on MnPc, TbPc, and TbPc deposited on Ni, Mn, and CoO thin films. Depending on the number of Pc ligands, we find that the metal ions within the molecules couple either parallel or antiparallel to a ferromagnetic substrate. Whereas single-decker complexes such as MnPc form a unique magnetic entity with ferromagnetic films, the intrinsic single molecule magnet properties of TbPc and TbPc remain largely unaltered. TbPc deposited on perpendicularly magnetized Ni films exhibits enhanced magnetic stability compared to TbPc in molecular crystals, opposite to TbPc deposited on in-plane magnetized Ni. Depending on the competition between uniaxial anisotropy, superexchange, and Zeeman interaction, the magnetic moment of TbPc can be aligned parallel or antiparallel to that of the substrate by modulating the intensity of an external magnetic field. This occurs also for TbPc, but the substrate-induced exchange coupling in triple-decker molecules is found to be short-ranged, that is, limited to the Tb ion closer to the ferromagnetic surface. Finally, we discuss the conditions required to establish exchange bias between molecules and antiferromagnetic substrates. We show that TbPc deposited on antiferromagnetic Mn thin films exhibits both exchange bias and enhanced coercivity when field cooled parallel to the out-of-plane easy axis. However, exchange bias does not extend to all molecules on the surface. On oxide antiferromagnets such as CoO we find no evidence of exchange bias for either TbPc or MnPc.
Ajuts: European Commission 203239
Ministerio de Ciencia e Innovación MAT2010-15659
Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-695
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Llengua: Anglès
Document: Article ; recerca ; Versió sotmesa a revisió
Matèria: Phthalocyanines ; Exchange bias ; Hybrid metal-organic interfaces ; XMCD
Publicat a: Surface Science, Vol. 630 (Dec. 2014) , p. 361-374, ISSN 0039-6028

DOI: 10.1016/j.susc.2014.07.008


Preprint
18 p, 6.5 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Institut Català de Nanociència i Nanotecnologia (ICN2)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2020-09-14, darrera modificació el 2023-03-02



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