Mn Valence, Magnetic, and Electrical Properties of LaMnO3+δ Nanofibers by Electrospinning

被引：27

作者：

Zhou, Xianfeng ^{[1
]}

Xue, Jiang ^{[2
]}

Zhou, Defeng ^{[3
]}

Wang, Zhongli ^{[1
]}

Bai, Yijia ^{[1
]}

Wu, Xiaojie ^{[1
]}

Liu, Xiaojuan ^{[2
]}

Meng, Jian ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[2] Changchun Univ Sci & Technol, Sch Mat Sci & Engn, Changchun 130022, Peoples R China

[3] Changchun Univ Technol, Sch Biol Engn, Changchun 130012, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2010年 / 2卷 / 10期

基金：

美国国家科学基金会;

关键词：

LaMnO3+delta; nanofibers; Mn valence; magnetic property; electrical propery; MANGANESE OXIDES;

D O I：

10.1021/am1004738

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

LaMnO3+delta nanofibers have been prepared by electrospinning. The nearly 70% of Mn atoms is Mn4+, which is much higher than that in the nanoparticles. The average grain size of our fibers is approximately 20 nm, which is the critical size producing the nanoscale effect. The nanofibers exhibit a very broad magnetic transition with T-c approximate to 255 K, and the T-c onset is around 310 K. The blocking temperature T-B is 180 K. The sample shows weak ferromagnetic property above the T-B and below T-c and superparamagnetic property near the T-c onset. The resistivity measurements show a metal insulator transition near 210 K and an upturn at about 45 K.

引用

页码：2689 / 2693

页数：5

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