Optical response of oxygen deficient La0.7Sr0.3MnO3 thin films deposited by pulsed laser deposition

被引：20

作者：

Cesaria, M. ^{[1
]}

Caricato, A. P. ^{[1
]}

Leggieri, G. ^{[1
]}

Martino, M. ^{[1
]}

Maruccio, G. ^{[1
,2
]}

机构：

[1] Univ Salento, Dept Math & Phys Ennio De Giorgi, I-73100 Lecce, Italy

[2] CNR, Nanosci Inst, NNL, I-73100 Lecce, Italy

来源：

THIN SOLID FILMS | 2013年 / 545卷

关键词：

Lanthanum strontium manganite; Pulse laser deposition; Optical response; Oxygen vacancies; Absorption coefficient; Tauc's plot; COLOSSAL-MAGNETORESISTANCE MANGANITES; DOUBLE-EXCHANGE FERROMAGNET; ELECTRONIC-STRUCTURE; MAGNETIC-PROPERTIES; SPIN POLARIZATION; METAL TRANSITION; SMALL-POLARON; TRANSPORT; PHASE; CONDUCTIVITY;

D O I：

10.1016/j.tsf.2013.07.071

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The optical response of 200 nm thick La0.7Sr0.3MnO(3 - delta) films, deposited by pulsed laser deposition on amorphous silica substrates heated at nearly 600 degrees C, under different oxygen pressures (0.1 Pa, 0.5 Pa, 1 Pa, 5 Pa and 10 Pa), is reported. The effects of the oxygen non-stoichiometry are investigated at room temperature dealing with the absorption coefficient and the Tauc's plot method rather than conventional optical conductivity. The absorption curves are evaluated by an algorithm able to realistically describe the behavior of thin films without exploiting numerical extrapolations or simplified theoretical models or ab-initio calculations. Optical features, tunable by the growth oxygen pressure, are discussed based on the known theoretical and experimental scenario. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：592 / 600

页数：9

共 82 条

[1] OPTICAL-PROPERTIES OF CRSB, MNSB, NISB, AND NIAS [J].