Investigation Of Magnetic Transition In Pr_1-xCa_xMnO₃(0

In 1950's perovskite-type manganite was prepared, but they haven't been paid much attention. Recently colossal magnetoresistance (CMR) effect was found in them, and in Pr_1-xCa_xMnO₃ many special phase transitions were shown with Ca substitution. There are lots of questions haven't been found the answer. The charge-ordering (CO) state as a well-known topic of magnetoelectronics was researched systemically. It was shown in the measurements of magnetization and resistivity for polycrystalline Pr_1-xCa_xMnO₃ (01-xCa_xMnO₃ (0