BaCu3O4: High Temperature Magnetic Order in One-Dimensional S=1/2 Diamond-Chains

Details BaCu3O4: High Temperature Magnetic Order in One-Dimensional S=1/2 Diamond-Chains BaCu3O4: High Temperature Magnetic Order in One-Dimensional S=1/2 Diamond-Chains

2012-02-22

arxiv.org/abs/1202.5047v2

Phys. Rev. B 85 (2012) 134518

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.85.134518

The magnetic properties of the alkaline earth oxocuprate BaCu3O4 are investigated. We show that the characteristic Cu3O4 layers of this material can be described with diamond chains of antiferromagnetically coupled Cu 1/2 spins with only a weak coupling between two adjacent chains. These Cu3O4 layers seem to represent a so far unique system of weakly coupled one-dimensional magnetic objects where the local AF ordering of the Cu2+ ions leads to an actual net magnetic moment of an isolated diamond chain. We demonstrate a magnetic transition at a high N\'eel temperature T_{N}=336 K.

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