Physics – Atomic and Molecular Clusters
Scientific paper
2008-01-14
Physics
Atomic and Molecular Clusters
8 pages, 5 figures
Scientific paper
10.1103/PhysRevB.77.224409
Our measurements of the differential susceptibility dM/dH of the frustrated magnetic molecules Mo72Fe30 and Mo72Cr30 reveal a pronounced dependence on magnetic field (H) and temperature (T) in the low H - low T regime, contrary to the predictions of existing models. Excellent agreement with experiment is achieved upon formulating a nearest-neighbor classical Heisenberg model where the 60 nearest-neighbor exchange interactions in each molecule, rather than being identical as has been assumed heretofore, are described by a two-parameter probability distribution of values of the exchange constant. We suggest that the probability distribution provides a convenient phenomenological platform for summarizing the combined effects of multiple microscopic mechanisms that disrupt the idealized picture of a Heisenberg model based on a single value of the nearest-neighbor exchange constant.
Fang Xikui
Kindo Koichi
Kögerler Paul
Luban Marshall
Matsuo Akira
No associations
LandOfFree
Multiple nearest-neighbor exchange model for the frustrated magnetic molecules Mo72Fe30 and Mo72Cr30 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 Multiple nearest-neighbor exchange model for the frustrated magnetic molecules Mo72Fe30 and Mo72Cr30, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple nearest-neighbor exchange model for the frustrated magnetic molecules Mo72Fe30 and Mo72Cr30 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-634294