  The magnetic phase diagram of $La_{1-\delta}MnO_{3}$ powdered samples have
been studied as a function of $\delta $ in the low doping range.
$La_{0.97}MnO_{3}$ has a canted magnetic structure at low temperature $(\theta
\simeq 130\QTR{group}{{}^{\circ}})$. Above $T_{C}=118K$, it becomes a
paramagnet with a huge effective magnetic moment, $\mu_{eff}=6.0\mu_{B}$,
reflecting the presence of magnetoelastic polarons which are not affected by
the magnetic field (up to 20T) nor the temperature $(1.2T_{C}<T<2.5T_{C})$.
When $\delta $ is increased to $\delta =0.07$, polarons are still presen at
high temperature, with a smaller size: $\mu_{eff}=5.8\mu_{B}$. The system
becomes fully ferromagnetic below 170K but remains insulating down to the
lowest temperature.
