title: Quantum phase interference and spin-parity in Mn12 single-molecule magnets.
abstract: Magnetization measurements of Mn12 molecular nanomagnets with spin ground states of S=10 and S=19/2 show resonance tunneling at avoided energy level crossings. The observed oscillations of the tunnel probability as a function of the magnetic field applied along the hard anisotropy axis are due to topological quantum phase interference of two tunnel paths of opposite windings. Spin-parity dependent tunneling is established by comparing the quantum phase interference of integer and half-integer spin systems.
authors.affiliation: Laboratoire L. Néel, associé à l'UJF, CNRS, BP 166, 38042 Grenoble Cedex 9, France.
authors.forename: W
authors.initials: W
authors.lastname: Wernsdorfer
authors.forename: N E
authors.initials: NE
authors.lastname: Chakov
authors.forename: G
authors.initials: G
authors.lastname: Christou