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Ferrimagnetism and abnormal spin lattice coupling in dilute magnetic ferroelectric (Bi0.46 Na0.46 Ba0.08)TiO3:Co

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【作者】 范婧； 董新伟； 宋友； 王克锋； 刘俊明； 江向平；

【Author】 Fan Jing a)b),Dong Xin-Wei a)b),Song You a),Wang Ke-Feng a)b),Liu Jun-Ming a)b),and Jiang Xiang-Ping c) a) Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China b) International Center for Materials Physics,Chinese Academy of Sciences,Shenyang 110016,China c) Department of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333001,China

【机构】 Laboratory of Solid State Microstructures,Nanjing University； International Center for Materials Physics,Chinese Academy of Sciences； Department of Material Science and Engineering,Jingdezhen Ceramic Institute；

【摘要】 We have investigated the low-temperature magnetism and spin-lattice coupling in (Bi 0.46 Na 0.46 Ba 0.08)TiO 3:Co in order to understand the magnetoelectric effect in such artificially synthesized dilute magnetic ferroelectrics.It is revealed that the as-prepared (Bi 0.46 Na 0.46 Ba 0.08)TiO 3: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.

【Abstract】 We have investigated the low-temperature magnetism and spin-lattice coupling in (Bi 0.46 Na 0.46 Ba 0.08)TiO 3:Co in order to understand the magnetoelectric effect in such artificially synthesized dilute magnetic ferroelectrics.It is revealed that the as-prepared (Bi 0.46 Na 0.46 Ba 0.08)TiO 3: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；
【Key words】 ferrimagnetics； magnetostriction； ferroelectricity；
【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)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2011年02期
  • 【分类号】O482.5
  • 【下载频次】22
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