Berlin 2015 – wissenschaftliches Programm
TT 71.37: Poster
Mittwoch, 18. März 2015, 15:00–18:00, Poster B
Tuning of the magnetic interactions in the frustrated spin chain compound linarite via hydrostatic pressure — •Jonathan Noky1, Wolf Schottenhamel1, Stefan-Ludwig Drechsler1, Stefan Süllow2, Anja U. B. Wolter1, and Bernd Büchner1 — 1IFW Dresden, Dresden, Germany — 2IPKM, TU Braunschweig, Braunschweig, Germany
Linarite (PbCuSO4(OH)2) is an anisotropic, quasi-one-dimensional frustrated spin-chain compound with competing ferromagnetic nearest-neighbor and antiferromagnetic next-nearest neighbor exchange interactions. Due to small but non-negligible interchain interactions linarite shows magnetic long-range order below T = 2.8K, where a helical ground state and a rich magnetic phase diagram have been observed for magnetic fields H parallel to the chain direction . The magnetic interactions and thereby the frustration ratio strongly depends on the bond angles and bond lengths between involved copper and oxygen atoms. In order to systematically change them, the application of chemical or hydrostatic pressure is a powerful tool. We present a magnetization study of linarite under high hydrostatic pressures for different magnetic fields both perpendicular and parallel to the chain direction.
 B. Willenberg et al., Phys. Rev. Lett. 108, 117202 (2012).