Magnetic properties of double perovskite La2BMnO6 (B = Ni or Co) nanoparticles

被引:75
作者
Mao, Yuanbing [1 ]
Parsons, Jason [1 ]
McCloy, John S. [2 ]
机构
[1] Univ Texas Pan Amer, Dept Chem, Edinburg, TX 78539 USA
[2] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA
基金
美国国家科学基金会;
关键词
SPIN-GLASS BEHAVIOR; LOW-TEMPERATURE SYNTHESIS; MOLTEN-SALT SYNTHESIS; ROOM-TEMPERATURE; LA2NIMNO6; LA2COMNO6; FILMS; LAALO3; SRTIO3;
D O I
10.1039/c3nr00825h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Double perovskite La2BMnO6 (B = Ni and Co) nanoparticles with average particle size of similar to 50 nm were synthesized using a facile, environmentally friendly, and scalable molten-salt reaction at 700 degrees C in air. Their structural and morphological properties were characterized by X-ray diffraction and transmission electron microscopy. Their magnetic properties were evaluated and compared using dc magnetic M-T and M-H, and ac magnetic susceptibility versus frequency, temperature, and field for the first time. The dc magnetization curves show paramagnetic-ferromagnetic transitions at T-C similar to 275 and 220 K for La2NiMnO6 (LNMO) and La2CoMnO6 (LCMO) nanoparticles, respectively. ac susceptibility revealed that the LCMO nanoparticles had a single magnetic transition indicative of Co2+-O2--Mn4+ ordering, whereas the LNMO nanoparticles showed more complex magnetic behaviors suggesting a re-entrant spin glass.
引用
收藏
页码:4720 / 4728
页数:9
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