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MA: Fachverband Magnetismus

MA 40: Frustrated Magnets II

MA 40.4: Talk

Thursday, March 21, 2024, 15:45–16:00, H 1058

Crystal and magnetic structure changes in Cu₃SO₄(OH)₄ under hydrostatic pressure — •Anton Kulbakov¹, Steven Gebel¹, Lukas Keller², Denis Cheptiakov², Gediminas Simutis², Darren Peets¹, and Dmytro Inosov¹ — ¹IFMP, TU Dresden, Germany — ²PSI, Villigen, Switzerland

A combination of frustration, low-dimensionality, and quantum spin fluctuations in spin-1/2 chain systems can introduce extremely high degeneracy and prevent the system from readily selecting a unique ground state. The magnetic order becomes exquisitely sensitive to the balance among the interactions and can be easily tuned among novel magnetically ordered phases. In antlerite, Cu₃SO₄(OH)₄, Cu²⁺ (S = 1/2) quantum spins populate three-leg zigzag ladders in a highly frustrated quasi-one-dimensional structural motif. Previously we presented the magnetic structures at ambient pressure. The application of a hydrostatic pressure on the order of 1 GPa leads to a qualitative change in the magnetic ground state in response to weak structural modifications.

Keywords: frustration; low-dimensionality; spin-1/2; antlerite; three-leg zigzag ladders