Special Issue "Transition Metal Magnetism"
A special issue of Magnetochemistry (ISSN 2312-7481).
Deadline for manuscript submissions: closed (28 February 2018).
Prof. Dr. Coen De Graaf
Affiliation: ICREA (Catalan Institution for Research and Advanced Studies), Dept. Physical and Inorganic Chemistry, Universitat Rovira i Virgili, Marcel•lí Domingo, s/n, 43007 Tarragona, Spain
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Interests: light-induced spin crossover; magnetic anisotropy; wave function analysis; magnetic coupling; Effective Hamiltonians; extended metal atom chains; highly correlated materials
Despite the very long-standing history of magnetic interactions in transition metal (TM) compounds—the magnetic susceptibility curve of the copper acetate complex was published more than sixty years ago—the research field remains as lively as ever. Interest have changed over the years, but the strong interaction of experiment and theory still makes possible to advance in our understanding of the exciting properties of the transition metal complexes with unpaired electrons.
Among the topics that have gained importance in the last years one can highlight the multiferroic properties of certain TM oxides, where the interplay of magnetic interactions and electric polarization can give rise to unexpected properties. Other recent discoveries in solid state materials with TM ions comprise the superconductivity in iron pnictides and the subtle interplay of isotropic exchange and spin-orbit interaction in 4d and 5d oxides, such as the iridates.
In the early days of single molecular magnetism, a great deal of effort has been invested in designing large polynuclear 3d transition metal complexes to maximize the total spin moment. Nowadays, attention has shifted to the lanthanides because of their intrinsic larger magnetic anisotropy. However, large anisotropy can also be attained in TM-3d complexes by using rigid polydentate ligands to avoid the quenching of the orbital angular moment. Complexes with a lanthanide and a TM-3d ion are also interesting candidates to combine large magnetic moments with large magnetic anisotropy.
Another topic of interest concerns the light induced magnetism in spin crossover complexes. The ultrafast relaxation of the excited state is not easily followed in experiment and theory is also having a hard time to give an accurate description of the process. Magnetic exchange interactions are traditionally studied in complexes with unpaired electrons in the 3d orbitals, but recently these interactions have also been subject of study in second and third row TM complexes. Furthermore, the incorporation of TM metal-organic frameworks (MOFs) and graphene sheets can also serve as examples of the continuing interest of the magnetism in systems due to presence of transition metals.
Prof. Dr. Coen de Graaf
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- spin-orbit coupling
- magnetic anisotropy
- spin crossover
- light-induced magnetism
- 3d-4f coupling
- transition metals in MOFs
- TM doping in graphene
- TM-4d and 5d interactions