Heisenberg spin triangles in {V6}-type magnetic molecules: Experiment and theory

Marshall Luban, Ferdinando Borsa, Sergey Bud’ko, Paul Canfield, Suckjoon Jun, Jae Kap Jung, Paul Kögerler, Detlef Mentrup, Achim Müller, Robert Modler, Daniel Procissi, Byoung Jin Suh, and Milton Torikachvili
Phys. Rev. B 66, 054407 – Published 5 August 2002; Erratum Phys. Rev. B 80, 059902 (2009)
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Abstract

We report the results of systematic experimental and theoretical studies of two closely related species of magnetic molecules of the type {V6}, where each molecule includes a pair of triangles of exchange-coupled vanadyl (VO2+, spin s=1/2) ions. The experimental studies include the temperature dependence of the low-field susceptibility from room temperature down to 2 K, the dependence of the magnetization on magnetic field up to 60 T for several low temperatures, the temperature dependence of the magnetic contribution to the specific heat, and the 1H and 23Na nuclear magnetic resonance spin-lattice relaxation rates 1/T1. This body of experimental data is accurately reproduced for both compounds by a Heisenberg model for two identical uncoupled triangles of spins; in each triangle, the spins interact via isotropic antiferromagnetic exchange, where two of the three V-V interactions have exchange constants that are equal and an order of magnitude larger than the third; the ground-state eigenfunction has total spin quantum number S=1/2 for magnetic fields below a predicted critical field Hc74T and S=3/2 for fields above Hc.

  • Received 19 February 2002

DOI:https://doi.org/10.1103/PhysRevB.66.054407

©2002 American Physical Society

Erratum

Erratum: Heisenberg spin triangles in {V6}-type magnetic molecules: Experiment and theory [Phys. Rev. B 66, 054407 (2002)]

Marshall Luban, Ferdinando Borsa, Sergey Bud’ko, Paul Canfield, Suckjoon Jun, Jae Kap Jung, Paul Kögerler, Detlef Mentrup, Achim Müller, Robert Modler, Daniel Procissi, Byoung Jin Suh, and Milton Torikachvili
Phys. Rev. B 80, 059902 (2009)

Authors & Affiliations

Marshall Luban1,*, Ferdinando Borsa1, Sergey Bud’ko1, Paul Canfield1, Suckjoon Jun2, Jae Kap Jung3, Paul Kögerler1, Detlef Mentrup4, Achim Müller5, Robert Modler1, Daniel Procissi1, Byoung Jin Suh6, and Milton Torikachvili7

  • 1Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011
  • 2Department of Physics, Simon Fraser University, Burnaby, BC, Canada V5A 1S6
  • 3Division of Electromagnetic Metrology, Korea Research Institute of Standards and Science, Daejeon, 305-600, Korea
  • 4Fachbereich Physik, Universität Osnabrück, D-49069 Osnabrück, Germany
  • 5Anorganische Chemie I, Universität Bielefeld, D-33501 Bielefeld, Germany
  • 6Department of Physics, The Catholic University of Korea, Puchon, 420-743, Korea
  • 7Department of Physics, San Diego State University, San Diego, California 92182

  • *Corresponding author. Electronic address: luban@ameslab.gov

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Issue

Vol. 66, Iss. 5 — 1 August 2002

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