The effect of B site doping on infrared emissivity of lanthanum manganites La0.8Sr0.2Mn1-xBxO3 (B = Ti or Cu)

被引：27

作者：

Shen, Xingmei ^{[1
]}

Xu, Guoyue ^{[1
]}

Shao, Chunming ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Nanjing 210016, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 499卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Ceramics; Solid-state reaction; Optical properties; Light absorption and reflection; MAGNETIC-PROPERTIES; MAGNETORESISTANCE; RESISTIVITY; SPIN; MN; TRANSPORT; INSULATOR; FE; NI; CO;

D O I：

10.1016/j.jallcom.2010.03.169

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：

The lanthanum manganites La0.8Sr0.2Mn1-xBxO3 (B=Ti or Cu, 0 <= x <= 0.4) were prepared by standard solid-state reaction method. The structure, infrared absorption, electron spin resonance (ESR) and infrared normal emissivity (epsilon(N)) in the 8-14 mu m waveband of the samples were systematically investigated. The samples are perovskite with distorted rhombohedral structure. Compared to x=0 sample with epsilon(N) value 0.693, infrared absorption occurred in the 8-14 mu m waveband leads to high emissivity value of the B site doping samples (epsilon(Ti) = 0.912 and epsilon(Cu)=0.894), and the epsilon(N) decreases slightly with increasing doping level due to decreasing transition probability indicated by ESR results. The EN changes slightly in the temperature range 293-373 K, from 0.9 to 0.882 for Ti doping and from 0.886 to 0.879 for Cu doping, owing to the weakening of the double-exchange interaction between Mn3+ and Mn4+. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：212 / 214

页数：3

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