Experimentally determining the exchange parameters of quasi-two dimensional Heisenbert magnets
- Los Alamos National Laboratory
- UNIV OF OXFORD
- RUTHERFORD APPLETON LAB
- EASTERN WASHINGTON UNIV
- ANL
Though long-range magnetic order cannot occur at temperatures T > 0 in a perfect two-dimensional (2D) Heisenberg magnet, real quasi-2D materials will invariably possess nonzero inter-plane coupling J{sub {perpendicular}} driving the system to order at elevated temperatures. This process can be studied using quantum Monte Carlo calculations. However, it is difficult to test the results of these calculations experimentally since for highly anisotropic materials in which the in-plane coupling is comparable with attainable magnetic fields J{sub {perpendicular}} is necessarily very small and inaccessible directly. In addition, because of the large anisotropy, the Neel temperatures are low and difficult to determine from thermodynamic measurements. Here, we present an elegant method of assessing the calculations via two independent experimental probes: pulsed-field magnetization in fields of up to 85 T, and muon-spin rotation.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 960573
- Report Number(s):
- LA-UR-08-05324; LA-UR-08-5324; TRN: US1002072
- Journal Information:
- New Journal of Physics, Journal Name: New Journal of Physics
- Country of Publication:
- United States
- Language:
- English
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