Magnetic Phase Diagram of Rouaite, Cu${}_2$(OH)${}_3$NO${}_3$

Abstract

Spinon-magnon mixing was recently reported in botallackite Cu${}_2$(OH)${}_3$Br with a uniaxially compressed triangular lattice of Cu${}^{2+}$ quantum spins [Zhang et al., Phys. Rev. Lett. 125, 037204 (2020)]. Its nitrate counterpart rouaite, Cu${}_2$(OH)${}_3$NO${}_3$, has a highly analogous structure and might be expected to exhibit similar physics. To lay a foundation for research on this material, we clarify rouaite's magnetic phase diagram and identify both low-field phases. The low-temperature magnetic state consists of alternating ferro- and antiferromagnetic chains, as in botallackite, but with additional canting, leading to net moments on all chains which rotate from one chain to another to form a 90${}^{\circ }$ cycloidal pattern. The higher-temperature phase is a helical modulation of this order, wherein the spins rotate from one Cu plane to the next. This extends to zero temperature for fields perpendicular to the chains, leading to a set of low-temperature field-induced phase transitions. Rouaite may offer another platform for spinon-magnon mixing, while our results suggest a delicate balance of interactions and high tunability of the magnetism.

21 pages, 21 figures; CIF files describing the refinements provided as ancillary files

References in corpus (12)

• Frustrated two dimensional quantum magnets
• Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation
• Competing exchange interactions on the verge of a metal-insulator transition in the two-dimensional spiral magnet Sr${}_3$Fe${}_2$O${}_7$
• Coexistence and interaction of spinons and magnons in an antiferromagnet with alternating antiferromagnetic and ferromagnetic quantum spin chains
• Frustration model and spin excitations in the helimagnet FeP
• First-principles characterization of the magnetic properties of Cu${}_2$(OH)${}_3$Br
• Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite, Cu${}_3$SO${}_4$(OH)${}_4$
• Possible coexistence of short-range resonating-valence-bond and long-range stripe correlations in the spatially anisotropic triangular-lattice quantum magnet Cu${}_2$(OH)${}_3$NO${}_3$
• Incommensurate and multiple-$\mathbf{q}$ magnetic misfit order in the frustrated quantum-spin-ladder material antlerite, Cu${}_3$SO${}_4$(OH)${}_4$
• Spin glassiness and power law scaling in a quasi-triangular spin-1/2 compound
• Rich Magnetic Phase Diagram of Putative Helimagnet Sr${}_3$Fe${}_2$O${}_7$
• Quantum fluctuation effects on the ordered Moments in a two dimensional frustrated ferrimagnet

Cited by in corpus (3)

• Pressure-tuned spin chains in brochantite, Cu${}_4$SO${}_4$(OH)${}_6$
• Stacking disorder in novel ABAC-stacked brochantite, Cu${}_4$SO${}_4$(OH)${}_6$
• NMR Determination of the Low-Field Magnetic Structure of the Cu-Based Mineral Rouaite Cu${}_2$(OH)${}_3$NO${}_3$