QUANTUM TUNNELLING OF A HIGH SPIN
IN SINGLE-MOLECULE MAGNETS: SPIN PARITY EFFECTS
M. A. Falloul, M. El Hafidi*
Laboratoire “Modélisation & Instrumentation”
Faculté des Sciences Ben M’sik - Département de Physique
Université Hassan II Mohammedia-Casablanca
B.P: 7955 Sidi Othmane -
* Corresponding author. E-mail: email@example.com
Received: 17 May 2010; revised version accepted: 19 June 2010
A pure quantum model of molecular magnets is presented. Energy levels and corresponding states are determined by numerical Diagonalization of the (2S+1)(2S+1) spin Hamiltonian and quenching points have been derived. The spin parity effects are analyzed for a biaxial system. The magnetization steps have been shown in agreement with many well known experimental data.
Keywords: Macroscopic quantum tunnelling; Single Molecule magnets spin parity; biaxial system; Numerical diagonalization.