Pressure-induced phase transition in a molecule-based magnet with interpenetrating sublattices

被引：19
|
作者：
Fishman, Randy S. [1 ]
Shum, William W. [2 ,3 ]
Miller, Joel S. [2 ]
机构：
[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[2] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA
[3] Cornell Univ, Dept Chem, Ithaca, NY 14853 USA
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 17期
基金：
美国国家科学基金会;
关键词：
LOW-SPIN TRANSITION; INDUCED VALENCE; AXIAL LIGANDS;
D O I：
10.1103/PhysRevB.81.172407
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The molecule-based magnet [Ru(2)(O(2)CMe)(4)](3)[Cr(CN)(6]) contains two interpenetrating sublattices with sublattice moments confined to the cubic diagonals. At ambient pressure, a field of about 850 Oe rotates the antiferromagnetically coupled sublattice moments toward 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(III) and Ru(II/III)(2) spins on each sublattice. Above 7 kbar, the sublattice moment drops by about half and the parallel linear susceptibility of each sublattice rises dramatically. The phase transition at 7 kbar is most likely caused by a high-to-low-spin transition on each Ru(2) complex.
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页数：4
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