Effects of oxygen incorporation in tensile La0.84Sr0.16MnO3-δ thin films during ex situ annealing -: art. no. 012412

被引：32

作者：

Seo, SH ^{[1
]}

Kang, HC ^{[1
]}

Jang, HW ^{[1
]}

Noh, DY ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Mat Sci & Technol, Kwangju, South Korea

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.71.012412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Structural changes in epitaxial La0.84Sr0.16MnO3-delta (LSMO) (001)/SrTiO3(001) thin films are studied using x-ray scattering during thermal annealing. As oxygen atoms are incorporated during annealing ex situ in air, the unit-cell volume contracts, which is attributed to the increased ratio of Mn4+ ions as indicated by enhanced saturation magnetization and ferromagnetic transition temperature. The unit-cell contraction occurs rather abruptly, suggesting that a structural phase transition happens during annealing. A 200-Angstrom-thick film remains almost fully strained even after annealing. In this case, a fourfold structural modulation is observed which accommodates the augmented lattice strain energy.

引用

页数：3

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