  A recent paper from Raveau's group (arXiv:1106.6253) has shown the existence
of a glass-like arrested state in two calcium-doped cobaltites, which consists
of coexisting ferromagnetic and antiferromagnetic phase fractions, resulting
from arrest of kinetics at low temperature,. They use the "cooling and heating
in unequal magnetic field (CHUF)" measurement protocol to show devitrification
of the arrested state. They use the same section title, protocol name, and
acronym as in the paper (arXiv:0805.1514) where the protocol was presented,
justified, and exploited. They nowhere refer to that paper, or to its journal
counterpart. We put the development of this CHUF protocol in perspective,
bringing out that it was conceived for broadened first order transitions where
the kinetics of the transformation gets hindered. We also point out its
applicability in view of our various subsequent works (arXiv:0911.4552,
arXiv:1003.4400 and their journal counterparts) further exploiting this
protocol. The paper being commented on is also silent about these latter papers
(or their journal counterparts) even though the use of this protocol is
highlighted in these in the abstract itself.
