Magnetic-field-induced reorientation in the spin-density-wave and the spin-stripe phases of the frustrated spin-1/2 chain compound beta-TeVO4

Mirta Herak (1) , Nikolina Novosel (1) , Martina Dragicevic (1) , Thierry Guizouarn (2) , Olivier Cador (2) , Helmuth Berger (3) , Matej Pregelj (4) , Andrej Zorko (5, 4) , Denis Arčon (5)

1 Institut of Physics, Bijenicka, Zagreb
2 ISCR - Institut des Sciences Chimiques de Rennes
3 EPFL - Ecole Polytechnique Fédérale de Lausanne
4 IJS - Jozef Stefan Institute [Ljubljana]
5 University of Ljubljana

beta-TeVO4 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 mu H-0 >= 2 T. The observed spin reorientation is another element of the anisotropic phase diagram for the field directions in the ac and a*b 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 beta-TeVO4 and similar low-dimensional quantum spin systems.

Mots clés: Magnetic anisotropy; zig-zag spin chain; frustrated spin systems; spin reorientations

Domaines: Chimie; Physique [physics]

Mirta Herak, Nikolina Novosel, Martina Dragicevic, Thierry Guizouarn, Olivier Cador, et al.. Magnetic-field-induced reorientation in the spin-density-wave and the spin-stripe phases of the frustrated spin-1/2 chain compound beta-TeVO4. Physical Review B, 2020, 102 (2), pp.024422. ⟨10.1103/PhysRevB.102.024422⟩. ⟨hal-02928575⟩