Abstract
is a frustrated spin-1/2 zig-zag chain system, where spin-density-wave (SDW), vector-chiral (VC) and an exotic dynamic spin-stripe phase compete at low temperatures. Here we use torque magnetometry to study the anisotropy of these phases in magnetic fields of up to 5 T. Our results show that the magnetic-field-induced spin reorientation occurs in the SDW and in the spin-stripe phases for T. The observed spin reorientation is another element of the anisotropic phase diagram for the field directions in the and crystallographic planes. The presented results should help establishing the model of anisotropic magnetic interactions, which are responsible for the formation of complex magnetic phases in and similar low-dimensional quantum spin systems.
- Received 6 February 2020
- Revised 1 July 2020
- Accepted 1 July 2020
DOI:https://doi.org/10.1103/PhysRevB.102.024422
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