Session T13: Focus Session: Low-Dimensional and Molecular Magnetism - Molecular Ferromagnetism and 2D Magnetism

2:30 PM–5:06 PM, Wednesday, February 29, 2012
Room: 211

Sponsoring Units: DMP GMAG
Chair: Philip Stamp, University of British Columbia

Abstract ID: BAPS.2012.MAR.T13.1

Abstract: T13.00001 : Magnetic phase diagram of quasi-2D quantum Heisenberg antiferromagnets with XY anisotropy

2:30 PM–2:42 PM

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Authors:

  Fan Xiao
    (Department of Physics, Clark University, Worcester MA 01610)

  Christopher Landee
    (Department of Physics, Clark University, Worcester MA 01610)

  Mark Turnbull
    (Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610)

  Nathanael Fortune
    (Department of Physics, Smith College, Northampton MA 01063)

  Scott Hannahs
    (National High Magnetic Field Lab, Tallahassee, FL 32310)

The magnetic phase diagram of a quasi-2D quantum Heisenberg antiferromagnetic compound Cu(pz)2(Cl$_{\mbox{O4}\mbox{)2}}$ [1] has been determined by experimental measurements; TN shows a strong field dependence. The data reveal the presence of a small (0.5\%) amount of XY anisotropy. QMC simulations have been performed to examine the role of the anisotropy and the interlayer exchange (') upon the phase diagram [2,3]. Comparison of the QMC results with the experimental phase diagram will be presented. \\[4pt] [1] F. Xiao, F. M. Woodward, C. P. Landee, M. M. Turnbull, C. Mielke, N. Harrison, T. Lancaster, S. J. Blundell, P. J. Baker, P. Babkevich, and F. L. Pratt. Phys. Rev. B, 79(13): 134412 (2009) \\[0pt] [2] A. Cuccoli, T. Roscilde, R. Vaia, and P. Verrucchi. Phys. Rev. B, 68(6):060402 (2003). \\[0pt] [3] A. Cuccoli, T. Roscilde, R. Vaia, and P. Verrucchi. Phys. Rev. Lett., 90(16): 167205 (2003).

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.T13.1