Ferrimagnetism and abnormal spin lattice coupling in dilute magnetic ferroelectric (Bi_(0.46) Na_(0.46) Ba_(0.08))TiO_3:Co  

作　　者：范婧 董新伟 宋友 王克锋 刘俊明 江向平 

机构地区：[1]Laboratory of Solid State Microstructures,Nanjing University [2]International Center for Materials Physics,Chinese Academy of Sciences [3]Department of Material Science and Engineering,Jingdezhen Ceramic Institute

出　　处：《Chinese Physics B》2011年第2期487-494,共8页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50832002 and 10874075);the National Basic Research Program of China (Grant Nos. 2009CB613303 and 2009CB929501);the Natural Science Foundation of Jiangsu Province,China (Grant No. BK2008024)

摘　　要：We have investigated the low-temperature magnetism and spin-lattice coupling in （Bio.46Nao.46Bao.os）TiO3 ：Co in order to understand the magnetoelectric effect in such artificially synthesized dilute magnetic ferroelectrics. It is revealed that the as-prepared （Bio.46Nao.46Bao.os）TiO3：Co at Co content of 20%~30% exhibits fascinating ferrimagnetism which is robust against magnetic field, the abnormal spin lattice coupling characterized by a negative magnetostriction effect; and the suppressed magnetic moment within the temperature range of 30 K-50 K is identified. These magnetic behaviours at low temperatures can be explained by the competition between the ferrimagnetic response and the magnetic moment suppression induced by the abnormal spin lattice coupling effect. Finally, the ferroelectric and magnetodielectric properties are also discussed.We have investigated the low-temperature magnetism and spin-lattice coupling in （Bio.46Nao.46Bao.os）TiO3 ：Co in order to understand the magnetoelectric effect in such artificially synthesized dilute magnetic ferroelectrics. It is revealed that the as-prepared （Bio.46Nao.46Bao.os）TiO3：Co at Co content of 20%~30% exhibits fascinating ferrimagnetism which is robust against magnetic field, the abnormal spin lattice coupling characterized by a negative magnetostriction effect; and the suppressed magnetic moment within the temperature range of 30 K-50 K is identified. These magnetic behaviours at low temperatures can be explained by the competition between the ferrimagnetic response and the magnetic moment suppression induced by the abnormal spin lattice coupling effect. Finally, the ferroelectric and magnetodielectric properties are also discussed.

关 键 词：FERRIMAGNETICS MAGNETOSTRICTION FERROELECTRICITY 

分 类 号：O482.5[理学—固体物理]