Indications of intrinsic chemical and structural inhomogeneity in lightly doped La1-xSrxMnO3.
Indications of intrinsic chemical and structural inhomogeneity in lightly doped La1-xSrxMnO3.
复制标题
轻掺杂 La1-xSrxMnO3 中固有化学和结构不均匀性的迹象。
DOI：
10.1103/physrevlett.88.207205
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发表时间：
2001
影响因子：
8.6
通讯作者：
P. Schiffer
中科院分区：
文献类型：
--
作者：
T. Shibata;B. Bunker;John Mitchell;P. Schiffer
X射线吸收精细结构测量的Sr和La的K边缘的固溶体La（1-x）SrxMnO 3揭示了一致的偏离随机分布的Sr在La/Sr网站x小于或接近0.3。在低x样品的阳离子亚晶格上的局部结构紊乱也观察到不同的附近的富镧和富锶的集群。局域聚集和结构无序建立了纳米尺度上的内在化学和结构不均匀性，这可能为磁电子相分离的成核提供了机制。
X-ray absorption fine structure measurements of the Sr and La K edges of the solid solution La(1-x)SrxMnO3 reveal a consistent deviation from a random distribution of Sr at the La/Sr sites for x less than or similar to 0.3. 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.