Synthesis and crystal structure of (Sr1 − xCax)2FeMnOy (x = 0–1.0)
Synthesis and crystal structure of (Sr1 − xCax)2FeMnOy (x = 0–1.0)
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(Sr1 − xCax)2FeMnOy (x = 0–1.0) 的合成和晶体结构
DOI：
10.1016/s0167-577x(96)00190-5
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发表时间：
1997
影响因子：
3
通讯作者：
K. Makino
中科院分区：
文献类型：
--
作者：
Yuunosuke Nakahara;Sumio Kato;M. Sugai;Yozo Ohshima;K. Makino
在1150 ~ 1200℃的空气中合成了（Sr1−xCax）2FeMnOy(x = 0 ~ 1.0)，并对其晶体结构和电性能进行了研究。在x = 0 ~ 0.7和x = 0.8 ~ 1.0的组成范围内分别形成钙钛矿型和褐磨矿型化合物。Ca2FeMnOy（x = 1.0）为褐煤型化合物，晶格参数a = 0.5338 nm, b = 1.4834 nm, c = - 0.5515 nm。根据Ca2FeMnOy的精细化结构数据，计算出Fe-O-Mn的夹角为151°。结果表明，feo4四面体和mno6八面体沿b轴呈之字形交替排列。所有样品均表现出p型半导体行为。
(Sr1−xCax)2FeMnOy(x = 0–1.0) were synthesized in air at 1150–1200 °C and their crystal structures and electric properties investigated. The perovskite-type and the brownmillerite-type compounds were formed in the compositional range x = 0–0.7 and x = 0.8–1.0, respectively. Ca2FeMnOy(x = 1.0) was the brownmillerite-type compound with lattice parameters a = 0.5338 nm, b = 1.4834 nm and c = −0.5515 nm. The angle of Fe-O-Mn was 151 ° calculated from the refined structure data of Ca2FeMnOy. It is indicated that the FeO4tetrahedra and the MnO6octahedra are alternately arranged zigzag along the b-axis. All samples exhibited p-type semiconducting behavior.