Paramagnetic insulator/ferromagnetic conductor composites La1.4Sr1.6Mn2O7/La0.67Sr0.33MnO3 is successfully prepared by one-step sol-gel mothed.The crystal structures are analyzed by X-ray diffraction(XRD),the magnetic properties are measured by PPMS.Two magnetic transition temperatures are found in this composite from high temperature to low temperature.The magnetization holds the line and the magnitude of magnetization increases between TC1 and TC3D with the fraction of La0.67Sr0.33MnO3 phase increasing,bu...