Manipulation of the spin in single molecule magnets via Landau-Zener transitions

Andrew Palii, Boris Tsukerblat, Juan M. Clemente-Juan, Alejandro Gaita-Ariño, Eugenio Coronado

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We theoretically investigate the effects of a magnetic pulse on a single-molecule magnet (SMM) initially magnetized by a dc field along the easy axis of magnetization. In the Landau-Zener (LZ) scheme, it is shown that the final spin state is a function of the shape and duration of the pulse, conditioned by the decoherence time of the SMM. In the case of coherent tunneling, the asymmetric pulses are shown to reverse the direction of the magnetization, while the symmetric pulses can only decrease the value of the initial magnetization. It is also demonstrated that the application of an external variable dc field in the hard plane of magnetization provides the possibility to tune the resulting magnetization due to quantum interference effects. The results and the conditions for the observation of the pulse-triggered LZ transitions are illustrated by the application of the proposed scheme to the well-studied single-molecule magnet Fe8. To put the results into perspective, some potential applications of SMMs experiencing pulse-induced LZ transitions, such as switching devices and qubits, are discussed.

Original languageEnglish
Article number184426
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
StatePublished - 17 Nov 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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