  The gigantic reduction of the electric resistivity under the applied magnetic
field, CMR effect, is now widely accepted to appear in the vicinity of the
insulator to metal transition of the perovskite manganites. Recently, we have
discovered the first order transition from ferromagnetic metal to insulator in
$\rm La_{0.88}Sr_{0.12}MnO_3$ of the CMR manganite. This phase transition
induces the tremendous increase of the resistivity under the external magnetic
field just near above the phase transition temperature. We report here fairly
detailed results from the systematic experiments including neutron and
synchrotron X-ray scattering studies.
