Glas transition in dipolar magnets?

Unreachable glass transition in dilute dipolar magnet.
A. Biltmo & P. Henelius ncomms1857.pdf (application/pdf Object)

The experimental data (black dots) are from Quilliam et al.¹³, whereas red lines are best fits to equation (3) at temperatures 0.10, 0.11, 0.12, 0.14, 0.15, 0.17 and 0.20 K from left to right.