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

Randy S. Fishman; William W. Shum; Joel S. Miller

doi:10.1103/PhysRevB.81.172407

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

Randy S. Fishman, William W. Shum, Joel S. Miller

Materials Theory

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19 Scopus citations

Abstract

The molecule-based magnet [Ru₂ (O₂CMe) 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 Ru₂ complex.

Original language	English
Article number	172407
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.81.172407
State	Published - May 21 2010

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title = "Pressure-induced phase transition in a molecule-based magnet with interpenetrating sublattices",

abstract = "The molecule-based magnet [Ru2 (O2CMe) 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 Ru2 complex.",

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AU - Shum, William W.

AU - Miller, Joel S.

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N2 - The molecule-based magnet [Ru2 (O2CMe) 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 Ru2 complex.

AB - The molecule-based magnet [Ru2 (O2CMe) 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 Ru2 complex.

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DO - 10.1103/PhysRevB.81.172407

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

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