Low-energy Spectrum of a Tm-based Double-decker Complex

The magnetic and electronic properties of a Tm-based ¿double-decker¿ phtalocyanine complex are extensively investigated by several spectroscopic optical absorption, inelastic neutron-scattering and bulk specific-heat techniques. The resulting low-energy spectrum is exploited to obtain direct information on the ligand field. We show that the literature value of the second-order parameter A2 0 is significantly overestimated and that the additional parameters arising from the true C4 point symmetry instead of the usually assumed ideal D4d symmetry at the rare-earth site cannot be neglected on this energy scale, while the presence of further symmetry reduction at low temperature is highly unlikely. The effect of the proposed ligand-field parameters on the relaxation properties of the Tb-based double-decker single-molecule magnet is briefly discussed.

MAGNANI Nicola;  CACIUFFO Roberto;  COLINEAU Eric;  WASTIN Franck;  BARALDI A.;  BUFFAGNI E.;  CAPELLETTI R.;  CARRETTA S.;  MAZZERA M.;  ADROJA D. T.;  WATANABE M.;  NAKAMURA A.; 

2009-03-16

AMER PHYSICAL SOC

JRC51004

1098-0121,   

http://prb.aps.org/,    https://publications.jrc.ec.europa.eu/repository/handle/JRC51004,   

10.1103/PhysRevB.79.104407,