Luis F, Mettes FL, Tejada J, Gatteschi D
Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9506, 2300 RA, Leiden, The Netherlands.
Phys Rev Lett. 2000 Nov 13;85(20):4377-80. doi: 10.1103/PhysRevLett.85.4377.
By applying a transverse magnetic field B( perpendicular) of sufficient strength to the uniaxial molecular magnets Fe8 and Mn12, the tunneling splitting Delta(t) of their S = +/-10 magnetic ground states can be made large compared to perturbations such as hyperfine and dipolar interactions. We present evidence for such a Delta(t) from magnetic specific heat data below 1 K that is consistent with coherent quantum mechanical tunneling in a "mesoscopic" system under such conditions.
通过对单轴分子磁体Fe8和Mn12施加足够强度的横向磁场B（垂直方向），与诸如超精细和偶极相互作用等微扰相比，其S = +/-10磁基态的隧穿分裂Δ(t)可以变大。我们从1 K以下的磁比热数据中给出了这种Δ(t)的证据，这与在这种条件下“介观”系统中的相干量子力学隧穿是一致的。
