Figure 2: Changes in the spiral magnetic order with the cooling rate.
From: Tuning magnetic spirals beyond room temperature with chemical disorder
(a) Temperature dependence of the modulus of the magnetic modulation vector q for the five YBaCuFeO5 samples. For each sample, q has been set to zero for T>TN2. The dashed lines are guides for the eye. (b) Evolution of the collinear-to-spiral transition temperature (TN2) and the ground state values (T=10 K) of the modulus of the magnetic modulation vector (qG) and the inclination of the spiral rotation plane (ϕG). The figure shows the positive correlation between the three quantities and the cooling rate. The error bars of qG and TN2 are smaller than the size of the symbols and the dotted line is a guide for the eye. The inclination angle ϕ is the complementary of the angle θ=90−ϕ used in ref. 21. The error bars of q(a) and qG and ϕG (b) are the standard deviations obtained from the fits of the magnetic structure using the FullProf Suite Rietveld package41,42.
