  Canonical spin-glass (SG) is an enigmatic system in condensed matter physics.
In spite of the intense activities of last five decades several questions
regarding the nature of the SG phase transition and the SG ground state are yet
to be resolved completely. In this backdrop we have revisited the field cooled
state of canonical spin-glass. We have experimentally studied magnetic response
in two canonical spin-glass systems AuMn(1.8%) and AgMn(1.1%), both in the
field cooled (FC) as well as zero field cooled (ZFC) state. We show that the
well known magnetic memory effect, which clearly established earlier the
metastable nature of the ZFC state in SG, is also present in the FC state. The
results of our experimental study indicate that the FC state also is a
non-equilibrium state, and hence the energy landscape involved is a non-trivial
one. This in turn seriously questions the picture of spin-glass transformation
as a second order thermodynamic phase transition.
