期刊
PHYSICAL REVIEW LETTERS
卷 88, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.88.207205
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X-ray absorption fine structure measurements of the Sr and La K edges of the solid solution La1-xSr xMnO3 reveal a consistent deviation from a random distribution of Sr at the La/Sr sites for xless than or similar to0.3 . Local structural disorder on the cation sublattice in the low-x samples is also observed to differ in the vicinity of the La-rich and Sr-rich clusters. The local clustering and structural disorder establish an intrinsic chemical as well as structural inhomogeneity on the nanometer scale, which may provide a mechanism for the nucleation of magnetoelectronic phase separation.
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