Hysteresis Loops and Adiabatic Landau-Zener-Stückelberg Transitions in the Magnetic Molecule {V6}

I. Rousochatzakis, Y. Ajiro, H. Mitamura, P. Kögerler, and M. Luban
Phys. Rev. Lett. 94, 147204 – Published 13 April 2005

Abstract

We have observed hysteresis loops and abrupt magnetization steps in the magnetic molecule {V6}, where each molecule comprises a pair of identical spin triangles, in the temperature range 1–5 K for external magnetic fields B with sweep rates of several Tesla per millisecond executing a variety of closed cycles. The hysteresis loops are accurately reproduced using a generalization of the Bloch equation based on direct one-phonon transitions between the instantaneous Zeeman-split levels of the ground state (an S=1/2 doublet) of each spin triangle. The magnetization steps occur for B0, and they are explained in terms of adiabatic Landau-Zener-Stückelberg transitions between the lowest magnetic energy levels as modified by an intertriangle anisotropic exchange of order 0.4 K.

  • Figure
  • Figure
  • Figure
  • Received 7 December 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.147204

©2005 American Physical Society

Authors & Affiliations

I. Rousochatzakis1,*, Y. Ajiro2,3, H. Mitamura4, P. Kögerler1, and M. Luban1

  • 1Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
  • 2Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
  • 3CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan
  • 4Institute for Solid State Physics, University of Tokyo, Chiba 106, Japan

  • *Electronic address: rusohatz@ameslab.gov

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 94, Iss. 14 — 15 April 2005

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×