Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method

被引：20

作者：

Brankovic, Z. ^{[1
]}

Duris, K. ^{[1
]}

Radojkovic, A. ^{[1
]}

Bernik, S. ^{[2
]}

Jaglicic, Z. ^{[3
]}

Jagodic, M. ^{[3
]}

Vojisavljevic, K. ^{[1
]}

Brankovic, G. ^{[1
]}

机构：

[1] Inst Multidisciplinary Res, Belgrade 11030, Serbia

[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia

[3] Inst Math Phys & Mech, Ljubljana 1000, Slovenia

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2010年 / 55卷 / 03期

关键词：

Lantanum manganite; Sintering; Oxygen atmosphere; Magnetic properties; TRANSPORT-PROPERTIES; MANGANATE PEROVSKITES; LANTHANUM MANGANITE; TEMPERATURE; SR; POWDERS; LAMNO3+/-DELTA; NANOPOWDERS; COMBUSTION; OXIDATION;

D O I：

10.1007/s10971-010-2251-4

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Substituted lanthanum manganites with the general formula A(1-x) B (x) MnO3 (A = La, B = Ca, SraEuro broken vertical bar) have attracted a lot of attention due to their exceptional electric and magnetic properties. In this work, pure and Ca2+, Sr2+-doped LaMnO3 (LMO) with the concentrations of dopants 30% Ca2+ (LCMO), 30% Sr2+ (LSMO) and 15% Ca2+ + 15% Sr2+ (LCSMO) (in mol. %) were synthesized by polymerizable complex method. Bulk samples were prepared by sintering at 1300 A degrees C for 4 h in oxygen atmosphere. It was found that sintering in oxygen atmosphere enables preparation of single phase ceramics with rhombohedral crystal structure. Chemically prepared fine, submicronic precursor powders provided uniform microstructure and grain size distribution in final ceramics. As a result, pure and doped LMO ceramics with excellent microstructural and magnetic properties were obtained. Depending on the composition, magnetic measurements showed high saturation magnetizations (up to 93 emu/g), with values of the Curie temperature in the range 180-390 K and magnetoresistance up to 67%.

引用

页码：311 / 316

页数：6

共 35 条

[1] Preparation of nanosized perovskite-type LaMnO3 powders using the thermal decomposition of a heteronuclear complex, LaMn(dhbaen)(OH)(NO3)(H2O)4 [J].