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

页码：516 / 519

页数：4

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