The surface phases of the La0.65Pb0.35MnO3 manganese perovskite surface

被引：41

作者：

Borca, CN ^{[1
]}

Xu, B ^{[1
]}

Komesu, T ^{[1
]}

Jeong, HK ^{[1
]}

Liu, MT ^{[1
]}

Liou, SH ^{[1
]}

Dowben, PA ^{[1
]}

机构：

[1] Univ Nebraska, Ctr Mat Res & Anal, Dept Phys & Astron, Lincoln, NE 68588 USA

来源：

SURFACE SCIENCE | 2002年 / 512卷 / 1-2期

关键词：

surface structure; morphology; roughness; and topography; surface segregation; X-ray photoelectron spectroscopy; manganese;

D O I：

10.1016/S0039-6028(02)01494-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied the surface composition and structure of colossal magneto-resistive perovskite thin films of La0.65Pb0.35MnO3. Depending on the annealing treatments, the thin film surface exhibits wildly different behavior and composition. With a gentle annealing procedure, the surface is dominated by appreciable Pb segregation, whereas a heavily annealed surface undergoes an irreversible restructuring into a Ruddlesden-Popper phase (La1-xPbx)(2)MnO4. The measured effective Debye temperatures of the two surfaces shows that the Pb-rich La0.65Pb0.35MnO3 surface region is softer than the surface of the Ruddlesden-Popper phase. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：L346 / L352

页数：7

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