these compounds, persistent spin dynamics are observed but the ordered moment is much larger than in [Yb$_2$Ti$_2$O$_7$]{}, most probably resulting in a more robust long-range ordering.

The fragility of the ordered state in [Yb$_2$Ti$_2$O$_7$]{} results in a sample dependence of the transition. The reasons for this dependence are under debate, and are of great importance to understand the mechanisms of the ordering in [Yb$_2$Ti$_2$O$_7$]{}. Questions immediately arise from the results reported here: magnetization measurements definitely show that a first-order magnetic transition occurs in these samples around the vicinity of the peak in specific heat. Does suppression of the ordering temperature in the single crystal suggest that disorder induced by the growth process increases spin fluctuations? Do other samples which present a peak in specific heat but no evidence of long-range ordering in neutron scattering measurements [@Ross11b] also show such evidence in magnetization? The analysis of our single crystal results as a function of temperature may give a preliminary answer to this question: the presence of a reversible bump before the step in the magnetization, seems to indicate a partial ordering first, at the specific heat maximum, before the achievement of the transition at lower temperature. Thus it might be possible 