Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-03-28
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
Pulsed-field magnetization experiments (fields $B$ of up to 85 T and temperatures $T$ down to 0.4 K) are reported on nine organic Cu-based two-dimensional (2D) Heisenberg magnets. All compounds show a low-$T$ magnetization that is concave as a function of $B$, with a sharp ``elbow'' transition to a constant value at a field $B_{\rm c}$. Monte-Carlo simulations including a finite interlayer exchange energy $J_{\perp}$ quantitatively reproduce the data; the concavity indicates the effective dimensionality and $B_{\rm c}$ is an accurate measure of the in-plane exchange energy $J$. Using these values and Ne\'el temperatures measured by muon-spin rotation, it is also possible to obtain a quantitative estimate of $|J_{\perp}/J|$. In the light of these results, it is suggested that in magnets of the form [Cu(HF$_2$)(pyz)$_2$]X, where X is an anion, the sizes of $J$ and $J_{\perp}$ are controlled by the tilting of the pyrazine (pyz) molecule with respect to the 2D planes.
Blundell Stephen J.
Cox Sonja
Goddard Paul A.
Harrison Neil
Lancaster Tom
No associations
LandOfFree
Exchange parameters of copper-based quasi-two-dimensional Heisenberg magnets measured using high magnetic fields and muon-spin rotation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exchange parameters of copper-based quasi-two-dimensional Heisenberg magnets measured using high magnetic fields and muon-spin rotation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exchange parameters of copper-based quasi-two-dimensional Heisenberg magnets measured using high magnetic fields and muon-spin rotation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-174336