Abstract
The dielectric properties of the prototypical frustrated ferromagnetic spin-chain compound known as linarite are studied across its strongly anisotropic magnetic phase diagram in single-crystal samples. The ferroelectric character of the principal low-field spin spiral phase is confirmed. The measured polarization is fully consistent with the previously proposed magnetic structure. Spontaneous polarization is also detected in two other field-induced phases but in some cases is incompatible with previously suggested models for the spin arrangement.
11 More- Received 20 September 2016
- Revised 18 November 2016
DOI:https://doi.org/10.1103/PhysRevB.94.214409
©2016 American Physical Society