Pressure-Induced Phase Transition in a Molecule-Based Magnet with Interpenetrating Sublattices
- ORNL
- University of Utah
The molecule-based magnet [Ru2(O2CMe)4]3[Cr(CN)6] contains two interpenetrating sublattices with each sublattice moment confined by anisotropy to a cubic diagonal. At ambient pressure, a field of about 850 Oe rotates the antiferromagnetically-coupled sublattice moments towards the field direction, producing a wasp-waisted magnetization curve. Up to 7 kbar, the sublattice moments increase with pressure due to the enhanced exchange coupling between the Cr and Ru2 spins on each sublattice. Above 7 kbar, the sublattice moment drops by about half and the the linear susceptibility of each sublattice along the cubic diagonal increases dramatically. The most likely explanation for this phase transition is that a high- to low-spin transition on each Ru2 complex reverses and lowers the net spin of each sublattice.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 983140
- Journal Information:
- Physical Review B, Vol. 81, Issue 17; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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