A numerical exact diagonalization technique is worked out for the anisotropic Heisenberg spin Hamiltonian with ring geometry. It is applied in large-scale simulations to a dodecanuclear nickel ring yielding the low-level energy spectra as a function of the single-ion anisotropy D and the thermodynamic functions. The strenght of the constant D is estimated at D/kB = 1.5 K. The results for the zero-field susceptibility and the field-dependent magnetization are presented and compared with experimental data.
SIMULATIONS OF THE LOW-DIMENSIONAL MOLECULAR-BASED SPIN SYSTEMS: DODECANUCLEAR NICKEL RING / CARAMICO D'AURIA, Alvaro; Esposito, Filippo; G., Kamieniarz; M., Haugler; D., Gatteschi. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 290-291:(2005), pp. 970-973.
SIMULATIONS OF THE LOW-DIMENSIONAL MOLECULAR-BASED SPIN SYSTEMS: DODECANUCLEAR NICKEL RING
CARAMICO D'AURIA, ALVARO;ESPOSITO, FILIPPO;
2005
Abstract
A numerical exact diagonalization technique is worked out for the anisotropic Heisenberg spin Hamiltonian with ring geometry. It is applied in large-scale simulations to a dodecanuclear nickel ring yielding the low-level energy spectra as a function of the single-ion anisotropy D and the thermodynamic functions. The strenght of the constant D is estimated at D/kB = 1.5 K. The results for the zero-field susceptibility and the field-dependent magnetization are presented and compared with experimental data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
