Mechanochemically assisted synthesis of yttrium-lanthanum orthoferrite: Structural and magnetic characterization

被引：14
|
作者：
Cristobal, A. A. [1 ]
Botta, P. M. [1 ]
Bercoff, P. G. [2 ]
Aglietti, E. F. [3 ]
Bertorello, H. R. [2 ]
Porto Lopez, J. M. [1 ]
机构：
[1] CONICET UNMdP, Inst Invest Ciencia & Tecnol Mat INTEMA, Mar Del Plata, Buenos Aires, Argentina
[2] UNC, IFEG, CONICET, Fac Matemat Astron & Fis FaMAF, RA-5000 Cordoba, Argentina
[3] CIC CONICET, Ctr Tecnol Recursos Minerales & Ceram CETMIC, Gonnet, Argentina
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 495卷 / 02期
关键词：
Magnetically ordered materials; Mechanochemical processing; Magnetic measurements; NONEQUILIBRIUM CATION DISTRIBUTION; CANTED SPIN ARRANGEMENT; LAFEO3; MECHANOSYNTHESIS; PEROVSKITES; SYSTEM; FERRITE; POWDERS; ROUTE;
D O I：
10.1016/j.jallcom.2009.10.061
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：
Polycrystalline Y(0 5)La(0 5)FeO(3) powder was synthesized by mechanochemical activation of Fe(3)O(4)-La(2)O(3)-Y(2)O(3) reactive mixtures X-ray diffraction was used to follow the evolution of the formation of this orthoferrite. Peaks corresponding to reactants were no longer observed after 3 h of activation, showing the completion of the reaction after this time. Magnetic hysteresis loops measured at room temperature revealed a gradual decrease of saturation magnetization, consistent with the consumption of ferrimagnetic Fe(3)O(4) and the formation of antiferromagnetic Y(0 5)La(0 5)FeO(3). However, a small ferromagnetic contribution was observed even after 3 h of milling, which can be attributed to a canting in the alignment of the two sub-lattices in the orthoferrite structure This uncompensated antiferromagnetism disappeared when the solid was heated, giving rise to a nearly antiferromagnetic structure (C) 2009 Elsevier B V. All rights reserved
引用
收藏
页码：516 / 519
页数：4
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