Synthesis and Ferrimagnetic Behaviour of Mn Doped Rare Earth Iron Garnets  

作　　者：GUO Li YUAN Lin PENG Wen YUAN Hong-ming FENG Shou-hua 

机构地区：[1]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,R R.China

出　　处：《Chemical Research in Chinese Universities》2012年第3期391-394,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.90922034,20771042)

摘　　要：Rare earth iron garnets R3Fe5-xMnxO12（R=Pr, Nd, Sm, Eu） were prepared through mild hydrothermal me- thod. The initial alkalinity of solutions was thought to play an important role in governing the content of Mn. The effect of substitution Fe^3＋ ions by Mn^3＋ ions on magnetic properties was investigated. The saturation magnetizations of Mn-doped samples are larger than that of corresponding parent compounds due to the moment of Mn^3＋ ion being smaller than that of Fe^3＋. It is clearly shown that incorporation of Mn^3＋ gives rise to significant variations in the Curie temperature. With increasing of Mn content x, Curie temperatures reduced sharply for the garnets, which could be explained by the exchange interaction between a-d Fe^3＋ being reduced in these compounds.Rare earth iron garnets R3Fe5-xMnxO12（R=Pr, Nd, Sm, Eu） were prepared through mild hydrothermal me- thod. The initial alkalinity of solutions was thought to play an important role in governing the content of Mn. The effect of substitution Fe^3＋ ions by Mn^3＋ ions on magnetic properties was investigated. The saturation magnetizations of Mn-doped samples are larger than that of corresponding parent compounds due to the moment of Mn^3＋ ion being smaller than that of Fe^3＋. It is clearly shown that incorporation of Mn^3＋ gives rise to significant variations in the Curie temperature. With increasing of Mn content x, Curie temperatures reduced sharply for the garnets, which could be explained by the exchange interaction between a-d Fe^3＋ being reduced in these compounds.

关 键 词：Hydrothermal synthesis GARNET SUBSTITUTION FERRIMAGNETISM 

分 类 号：O482.5[理学—固体物理] TP212[理学—物理]