Phase separation and low-field bulk magnetic properties of Pr0.7Ca0.3MnO3

Article

关键词: SPIN-GLASS;    PR1-XCAXMNO3;    BEHAVIOR;    MAGNETORESISTANCE;    TEMPERATURE;    TRANSITIONS;    STATE;   

DOI  :  10.1103/PhysRevB.63.172408

来源: SCIE

【 摘 要 】

We present a detailed magnetic study of the perovskite manganite Pr0.7Ca0.3MnO3 at low temperatures including magnetization and ac susceptibility measurements. The data appear to exclude a conventional spin glass phase at low fields, suggesting instead the presence of correlated ferromagnetic clusters embedded in a charge-ordered matrix. We examine the growth of the ferromagnetic clusters with increasing magnetic field as they expand to occupy almost the entire sample at H similar to0.5 T. Since this is well below the field required to induce a metallic state, our results point to the existence of a field-induced ferromagnetic insulating state in this material.

【 授权许可】

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