Magnetic-field-induced reorientation in the spin-density-wave and the spin-stripe phases of the frustrated spin- 12 chain compound β−TeVO4

Abstract

β-TeVO4 is a frustrated spin 1/2 zigzag chain system, where spin-density-wave (SDW), vectorchiral (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 spinstripe phases for µ0H ≥ 2 T. The observed spin reorientation is a new 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 β-TeVO4 and similar quantum systems.

Low-energy spin excitations of the frustrated ferromagnetic $J_1$-$J_2$ chain material linarite, PbCuSO$_4$(OH)$_2$, in applied magnetic fields $\mathbf{H} \parallel b$ axis

“…Here, particularly the parameter space −4 < α < 0 is of relevance. This is the range of α where, e.g., the compounds LiCuVO 4 [24][25][26][27][28][29][30][31][32][33], PbCuSO 4 (OH) 2 (linarite) [34][35][36][37][38][39][40][41][42][43][44][45][46], β-TeVO 4 [47][48][49][50][51][52][53], NaCuMoO 4 (OH) [55][56][57], Rb 2 Cu 2 Mo 3 O 12 [58][59][60] and Cs 2 Cu 2 Mo 3 O 12 [61][62][63][64] were established, and which have been studied actively during the past decades. The spin dynamic properties of these model systems have been investigated for a few of them by means of NMR, ESR and INS [27,30,31,39,41,42,44,45,…”