Session H16: Focus Session: 2D Quantum Magnetism

8:00 AM–11:00 AM, Tuesday, March 6, 2007
Colorado Convention Center - Korbel 4F

Sponsoring Unit: GMAG
Chair: Igor Zaliznyak, Brookhaven National Laboratory

Abstract ID: BAPS.2007.MAR.H16.4

Abstract: H16.00004 : High Frequency ESR study of the two-dimensional Heisenberg antiferromagnet copper pyrazine perchlorate.

8:36 AM–8:48 AM

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Authors:

  Johan van Tol
    (National High Magnetic Field Lab/Florida State University)

  Saritha Nellutla
    (National High Magnetic Field Lab/Florida State University)

  Chris Landee
    (Clark University, Department of Physics)

Copper pyrazine perchlorate, Cu(Pyrazine)$_{2}$(ClO$_{4})_{2}$, is thought to be an almost prefect 2D Heisenberg antiferromagnet. We have performed single crystal electron magnetic resonance experiments at 120, 240, and 336 GHz on this system. Both the line-width and resonance shift are field-dependant and indicate that the 3D antiferromagnetic ordering temperature increases from 4.2 K at zero field to about 7 K at 12 Tesla. This can be interpreted by a the field-induced XY-behavior, as has been predicted[1]. A. Cuccoli et al., \textit{Phys. Rev. B} \textbf{68}, 060402 (2003).

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.H16.4