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】
Free