Crystal growth and magnetic properties of the double perovskites R2MnNiO6 (R=Pr, Sm and Ho) by a hydrothermal route

被引：28
|
作者：
Zhang, Ganghua [1 ]
Li, Guobao [1 ]
Liao, Fuhui [1 ]
Fu, Yin [1 ]
Xiong, Ming [2 ]
Lin, Jianhua [1 ]
机构：
[1] Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
[2] China Univ Geosci, Xray Lab, Beijing 100083, Peoples R China
来源：
JOURNAL OF CRYSTAL GROWTH | 2011年 / 327卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Hydrothermal synthesis; Single-crystal growth; Double-perovskite oxides; R2MnNiO6; Ferromagnetism; RARE-EARTH-ELEMENT; ROOM-TEMPERATURE; MAGNETORESISTANCE; RE; LN; MANGANITES; OXIDE; LA; NI; CO;
D O I：
10.1016/j.jcrysgro.2011.06.002
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Double-perovskite oxides R2MnNiO6 (R=Pr, Sm, and Ho) were synthesized under mild hydrothermal conditions. Crystal growths of the samples were sensitive to the alkalinity, the reaction temperature and the time. The X-ray diffraction data show that all the compounds crystallize in the monoclinic structure of space group P2(1)/n. The purity and composition of the crystals are detected by ICP, SEM and EDX analysis. The magnetic studies for all the compounds indicated the dominance of ferromagnetic contribution and revealed a trivalent valence of both Mn and Ni with partial disorder. The T-C temperature of the R2NiMnO6 series is depended on the radius of R3+ atoms, which is consistent with the previous reported. (C) 2011 Elsevier B.V. All rights reserved.
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收藏
页码：262 / 266
页数：5
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