2005/02/04 by Ioannis Rousochatzakis, I. Rousochatzakis, Yoshitami Ajiro +7 · 3 citations
Biochemistry, Genetics and Molecular Biology · Chemistry · Materials Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #Electron Spin Resonance Studies #Magnetism in coordination complexes #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.94.147204
published as Phys. Rev. Lett. 94, 147204 (2005) · 4 pages, 3 figures
arxiv created 2005/02/04 · openalex publication_date 2005/04/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have observed hysteresis loops and abrupt magnetization steps in the magnetic molecule V(6), where each molecule comprises a pair of identical spin triangles, in the temperature range 1-5 K for external magnetic fields B with sweep rates of several Tesla per millisecond executing a variety of closed cycles. The hysteresis loops are accurately reproduced using a generalization of the Bloch equation based on direct one-phonon transitions between the instantaneous Zeeman-split levels of the ground state (an S=1/2 doublet) of each spin triangle. The magnetization steps occur for B approximately 0, and they are explained in terms of adiabatic Landau-Zener-Stückelberg transitions between the lowest magnetic energy levels as modified by an intertriangle anisotropic exchange of order 0.4 K.