Mechanochemical synthesis of yttrium manganite

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• 作者：M. Po?u?a-Ne&scaron ; i?^a ; Z. Marinkovi? Stanojevi?^a ; ^{mzorica@afrodita.rcub.bg.ac.rs} ; Z. Brankovi?^a ; P. Coti?^b ; S. Bernik^c ; M. Sousa Gó ; es^d ; B.A. Marinkovi?^e ; J.A. Varela^d ; G. Brankovi?^a
• 关键词：Mechanochemistry ; Multiferroic materials ; Yttrium manganite ; Microstructure ; Magnetic properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：5 March, 2013
• 年：2013
• 卷：552
• 期：Complete
• 页码：451-456
• 全文大小：1130 K

文摘

Yttrium manganite (YMnO₃) is a multiferroic material, which means that it exhibits both ferromagnetic and ferroelectric properties, so making it interesting for a variety of technological applications. In this work, single-phase YMnO₃ was prepared for the first time by mechanochemical synthesis in a planetary ball mill. The YMnO₃ was formed directly from the highly activated constituent oxides, Y₂O₃ and Mn₂O₃, after 60 min of milling time. During prolonged milling, the growth of the particles occurred. The cumulative energy introduced into the system during milling for 60 min was 86 kJ/g. The X-ray powder-diffraction analysis indicates that the as-prepared samples crystallize with an orthorhombic (Pnma) YMnO₃ structure. The morphology and chemical composition of the powder were investigated by SEM and FESEM. The magnetic properties of the obtained YMnO₃ powders were found to change as a function of the milling time in a manner consistent with the variation in the nanocomposite microstructure.