  The magnetocaloric effect (MCE) in the A-site ordered manganite NdBaMn2O6 is
studied. The MCE in this compound has an anomalous behavior. In low magnetic
fields, the abrupt transitions between direct and inverse magnetocaloric effect
are observed. In a relatively strong magnetic field H=11 kOe the direct and
inverse effects are observed only at cooling, while the heating mode reveals
only an inverse MCE. The value of the MCE (-{\Delta}S=0.7 J/kg K and {\Delta}S=
1.02 J/kg K for {\Delta}H=11 kOe) does not reach high values, but the proximity
of the effects occurring at room temperatures expects the use of both effects
in the magnetic cooling technology.
