摘要
Frequency-domain terahertz transmission spectra of Mn3 and Mn12 single molecule magnets （SMMs） have been measured at different temperatures, and hence the anisotropic parameters O2 and D4 of the spin Hamiltonian H = D2Sz^2 ＋ D4Sz^4 have been calculated. For Mn12 SMM, D2=-10.9 GHz and D4=-2.59×10^-2 GHz, while for Mn3 SMM, D2=-22.0 GHz and D4 can be con- sidered negligible. This suggests Mn3 SMM can be considered as a simpler and more suitable candidate for magnetic quantum tunneling research.
Frequency-domain terahertz transmission spectra of Mn3 and Mn12 single molecule magnets (SMMs) have been measured at different temperatures, and hence the anisotropic parameters D2 and D4 of the spin Hamiltonian H D2 S z2 D4 S z4have been calculated. For Mn12 SMM, D2= 10.9 GHz and D4= 2.59×10 2 GHz, while for Mn3 SMM, D2= 22.0 GHz and D4 can be considered negligible. This suggests Mn3 SMM can be considered as a simpler and more suitable candidate for magnetic quantum tunneling research.
基金
supported by the Science Foundation of the Chinese Academy of Sciences (Grant No. KJCX2-SW-W20)
the National Basic Research Program of China (Grant No. 2011CB921702)
