title: Density functional study of exchange coupling constants in single-molecule magnets: the Fe8 complex.
abstract: Theoretical methods based on density functional theory have been employed to analyze the exchange interactions in a Fe8 complex with single-molecule magnet behavior. The four exchange coupling constants, calculated by using a hybrid functional, provide an accurate description of the experimental magnetic susceptibility and excitation energies. This complex has been also employed to check the accuracy of classical and quantum Monte Carlo methods to obtain macroscopic properties by comparison with the results obtained via exact diagonalization of the Hamiltonian matrix.
authors.affiliation: Departament de Química Inorgànica and Centre de Recerca en Química Teórica, Universitat de Barcelona, Spain. eliseo.ruiz@qi.ub.es
authors.forename: Eliseo
authors.initials: E
authors.lastname: Ruiz
authors.forename: Joan
authors.initials: J
authors.lastname: Cano
authors.forename: Santiago
authors.initials: S
authors.lastname: Alvarez