Spin-parity dependent tunneling of magnetization in single-molecule magnets

Details Spin-parity dependent tunneling of magnetization in single-molecule magnets Spin-parity dependent tunneling of magnetization in single-molecule magnets

2001-09-04

arxiv.org/abs/cond-mat/0109067v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevB.65.180403

Single-molecule magnets facilitate the study of quantum tunneling of magnetization at the mesoscopic level. The spin-parity effect is among the fundamental predictions that have yet to be clearly observed. It is predicted that quantum tunneling is suppressed at zero transverse field if the total spin of the magnetic system is half-integer (Kramers degeneracy) but is allowed in integer spin systems. The Landau-Zener method is used to measure the tunnel splitting as a function of transverse field. Spin-parity dependent tunneling is established by comparing the transverse field dependence of the tunnel splitting of integer and half-integer spin systems.

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