Abstract
The reentrant spin glass behaviour was observed in half doping(La,Pr)1/2Ca1/2MnO3 manganites with a CE-typeantiferromagnetic structure. It shows sequential multiple magnetictransitions from the paramagnetic to the ferromagnetic,antiferromagnetic, spin glass (SG) transitions, which reflects thecomplex magnetic interaction in the ground state of manganites. Thiscan be explained by the competition interaction between theferromagnetic and the CE-type antiferromagnetic matrix, and thedisorder due to the tolerance factor t and A-cation size varianceσ2. The results reveals the coexistence of ferromagneticclusters and SG clusters in the background of the antiferromagneticmatrix in the ground state of half doping(Pr,La)1/2Ca1/2MnO3 systems.
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