title: Spin-communication channels between Ln(III) bis-phthalocyanines molecular nanomagnets and a magnetic substrate.
abstract: Learning the art of exploiting the interplay between different units at the atomic scale is a fundamental step in the realization of functional nano-architectures and interfaces. In this context, understanding and controlling the magnetic coupling between molecular centers and their environment is still a challenging task. Here we present a combined experimental-theoretical work on the prototypical case of the bis(phthalocyaninato)-lanthanide(III) (LnPc2) molecular nanomagnets magnetically coupled to a Ni substrate. By means of X-ray magnetic circular dichroism we show how the coupling strength can be tuned by changing the Ln ion. The microscopic parameters of the system are determined by ab-initio calculations and then used in a spin Hamiltonian approach to interpret the experimental data. By this combined approach we identify the features of the spin communication channel: the spin path is first realized by the mediation of the external (5d) electrons of the Ln ion, keeping the characteristic features of the inner 4 f orbitals unaffected, then through the organic ligand, acting as a bridge to the external world.
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Candini
authors.affiliation: Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstraße 1, D-47048 Duisburg, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Klar
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Marocchi
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Corradini
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.|Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Biagi
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.|Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: V
authors.initials: V
authors.lastname: De Renzi
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.|Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: U
authors.initials: U
authors.lastname: Del Pennino
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Troiani
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Bellini
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Klyatskaya
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76344 Eggenstein-Leopoldshafen, Germany.|Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 UdS-CNRS, 67034 Strasbourg Cedex 2, France.
authors.forename: M
authors.initials: M
authors.lastname: Ruben
authors.affiliation: European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38043 Grenoble, France.
authors.forename: K
authors.initials: K
authors.lastname: Kummer
authors.affiliation: European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38043 Grenoble, France.
authors.forename: N B
authors.initials: NB
authors.lastname: Brookes
authors.affiliation: School of Chemistry, The University of Melbourne, 3010 Victoria, Australia.
authors.forename: H
authors.initials: H
authors.lastname: Huang
authors.affiliation: School of Chemistry, The University of Melbourne, 3010 Victoria, Australia.
authors.forename: A
authors.initials: A
authors.lastname: Soncini
authors.affiliation: Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstraße 1, D-47048 Duisburg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Wende
authors.affiliation: Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.|Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia via G. Campi 213/A, 41125 Modena, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Affronte