Orthogonal spin arrangement as possible ground state of three - dimensional Shastry - Sutherland network in Ba3Cu3In4O12

Abstract

The Ba3Cu3In4O12 stands for unique topology of the magnetic subsystem. It consists of rotated by 90\Box${}^b$ relative to each other "paper-chain" columns made of vertex-sharing CuIO4 and CuIIO4 planar units. The overall pattern of the copper ions is that of a three-dimensional Shastry-Sutherland network. At high temperatures, the magnetic susceptibility follows the Curie-Weiss law with positive Weiss temperature indicating strong predominance of ferromagnetic coupling. At low temperatures, however, this compound reaches the antiferromagnetically ordered state and experiences non-trivial succession of two spin-flop and two spin-flip transitions reaching full saturation in modest magnetic fields. Here we show that the possible ground state in Ba3Cu3In4O12 can be three-dimensional orthogonal arrangement of the Cu2+ (S = 1/2) magnetic moments forming three virtually independent antiferromagnetic subsystems. In this arrangement, favored by anisotropic exchange interactions, the quantum fluctuations provide the coupling between three mutually orthogonal magnetic subsystems resulting in an impressive "order by disorder" effect.

11 pages, 5 figures, 1 table

References in corpus (4)

• Spin-modulated quasi-1D antiferromagnet LiCuVO_4
• Highly Dispersive Spin Excitations in the Chain Cuprate Li2CuO2
• Frustrated classical Heisenberg and XY models in 2 dimensions with nearest neighbor exchange: exact solution for the ground state phase diagram
• Electronic structure and magnetic properties of Li_2ZrCuO_4 - a spin 1/2 Heisenberg system in vicinity to a quantum critical point

Cited by in corpus (9)

• Multipolar phase in frustrated spin-1/2 and 1 chains
• The origin of up-up-down-down magnetic order in Cu${}_2$GeO${}_4$
• Spin-flop and antiferromagnetic phases of the ferromagnetic half-twist ladder compounds Ba3Cu3In4O12 and Ba3Cu3Sc4O12
• Hybridization and spin-orbit coupling effects in quasi-one-dimensional spin-1/2 magnet Ba3Cu3Sc4O12
• Frustrated spin-1/2 ladder with ferro- and antiferromagnetic legs
• Quantum phase diagram of a frustrated spin-1/2 system on a Trellis Ladder
• Kagome-like chains with anisotropic ferromagnetic and antiferromagnetic interactions
• Anomalous fractional quantization in the kagomelike Heisenberg ladder: Emergence of the effective spin-1 chain
• Magnetic properties of delta- and kagome-like chains with competing interactions