Magnetic model for A2CuP2O7 (A=Na, Li): One-dimensional versus two-dimensional behavior

S. Lebernegg, A. A. Tsirlin, O. Janson, R. Nath, J. Sichelschmidt, Yu. Skourski, G. Amthauer, and H. Rosner
Phys. Rev. B 84, 174436 – Published 28 November 2011


We report magnetization measurements, full-potential band-structure calculations, and microscopic modeling for the spin-1/2 Heisenberg magnets A2CuP2O7 (A=Na, Li) involving complex Cu-O-O-Cu superexchange pathways. Based on a quantitative evaluation of the leading exchange integrals and the subsequent quantum Monte Carlo simulations, we propose a quasi-one-dimensional magnetic model for both compounds, in contrast to earlier studies that conjectured on a two-dimensional scenario. The one-dimensional nature of A2CuP2O7 is unambiguously verified by magnetization isotherms measured in fields up to 50 T. The saturation fields of about 40 T for both Li and Na compounds are in excellent agreement with the intrachain exchange J127 K extracted from the magnetic susceptibility data. The proposed magnetic structure entails spin chains with the dominating antiferromagnetic nearest-neighbor interaction J1 and two inequivalent, nonfrustrated antiferromagnetic interchain couplings of about 0.01J1 each. A possible long-range magnetic ordering is discussed in comparison with the available experimental information.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 15 August 2011
  • Corrected 29 November 2011


©2011 American Physical Society


Publisher's Note: Magnetic model for A2CuP2O7 (A = Na, Li): One-dimensional versus two-dimensional behavior [Phys. Rev. B 84, 174436 (2011)]

S. Lebernegg, A. A. Tsirlin, O. Janson, R. Nath, J. Sichelschmidt, Yu. Skourski, G. Amthauer, and H. Rosner
Phys. Rev. B 84, 219901 (2011)

Authors & Affiliations

S. Lebernegg1, A. A. Tsirlin2,*, O. Janson2, R. Nath2,3, J. Sichelschmidt2, Yu. Skourski4, G. Amthauer1, and H. Rosner2,†

  • 1Department of Materials Engineering and Physics, Universität Salzburg, AU-5020 Salzburg, Austria
  • 2Max Planck Institute for Chemical Physics of Solids, DE-01187 Dresden, Germany
  • 3School of Physics, Indian Institute of Science Education and Research, Trivandrum-695016 Kerala, India
  • 4Dresden High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, DE-01314 Dresden, Germany

  • *

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Vol. 84, Iss. 17 — 1 November 2011

Reuse & Permissions
Access Options
Physics Next Workshops
March 20, 2017

The American Physical Society is initiating a new series of international workshops. These Physics Next workshops will be aimed at fostering new and emerging areas of physics research, focusing on topics that straddle traditional subject boundaries and are starting to “emerge from the noise.”

The first workshop is titled “Physics Next: Materials Design and Discovery,” and will take place on May 15 -17, 2017. More information.

Authorization Required




Sign up to receive regular email alerts from Physical Review B

Log In



Article Lookup

Paste a citation or DOI

Enter a citation