Structural properties of Fe-doped lanthanum gallate

被引：6
|
作者：
Mori, K
Fukunaga, T
Shibata, K
Iwase, K
Harjo, S
Hoshikawa, A
Itoh, K
Kamiyama, T
Ishigaki, T
机构：
[1] Kyoto Univ, Inst Res Reactor, Osaka 5900494, Japan
[2] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[3] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2004年 / 352卷 / 1-4期
关键词：
LaGaO3; DSC; X-ray diffraction; neutron diffraction; phase transition; high-spin state;
D O I：
10.1016/j.physb.2004.07.004
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Structural characteristics of Fe-doped LaGaO3-delta were studied by differential scanning calorimeter, neutron and high-temperature X-ray powder diffraction measurements. It was found that a phase transition temperature increases in proportion to an amount of Fe. The crystal structure could be described as a low-temperature orthorhombic phase (Pnma) and a high-temperature rhombohedral one (R3c), respectively. Lattice parameters and bond lengths between M (=Ga/Fe) and O are monotonically expand with increasing Fe-content on both orthorhombic and rhombohedral phases. This means that a substitution of Ga3+ with Fe3+ leads to an electronic configuration of t(2g)(3)e(g)(2) (high-spin state, HS). (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 155
页数：9
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