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

doi:10.1088/1674-1056/20/2/027502

中国物理B ›› 2011, Vol. 20 ›› Issue (2): 27502-027502.doi: 10.1088/1674-1056/20/2/027502

Ferrimagnetism and abnormal spin–lattice coupling in dilute magnetic ferroelectric (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co

江向平¹, 范婧², 董新伟², 宋友², 王克锋², 刘俊明²

(1)Department of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China; (2)Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China

收稿日期:2009-12-29 修回日期:2010-06-18 出版日期:2011-02-15 发布日期:2011-02-15
基金资助:
Project 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), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2008024).

Ferrimagnetism and abnormal spin–lattice coupling in dilute magnetic ferroelectric (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co

Fan Jing(范婧)^a)b), Dong Xin-Wei(董新伟)^a)b), Song You(宋友)^a), Wang Ke-Feng(王克锋)^a)b), Liu Jun-Ming(刘俊明)^a)b)†, and Jiang Xiang-Ping(江向平)^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

Received:2009-12-29 Revised:2010-06-18 Online:2011-02-15 Published:2011-02-15
Supported by:
Project 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), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2008024).

摘要/Abstract

摘要： We have investigated the low-temperature magnetism and spin--lattice coupling in (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co in order to understand the magnetoelectric effect in such artificially synthesized dilute magnetic ferroelectrics. It is revealed that the as-prepared (Bi_0.46Na_0.46Ba_0.08)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

Abstract: We have investigated the low-temperature magnetism and spin–lattice coupling in (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co in order to understand the magnetoelectric effect in such artificially synthesized dilute magnetic ferroelectrics. It is revealed that the as-prepared (Bi_0.46Na_0.46Ba_0.08)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.

Key words: ferrimagnetics, magnetostriction, ferroelectricity

中图分类号: (Ferrimagnetics)

75.50.Gg

75.30.Wx (Spin crossover) 75.80.+q (Magnetomechanical effects, magnetostriction)

范婧, 董新伟, 宋友, 王克锋, 刘俊明, 江向平. Ferrimagnetism and abnormal spin–lattice coupling in dilute magnetic ferroelectric (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co[J]. 中国物理B, 2011, 20(2): 27502-027502.

Fan Jing(范婧), Dong Xin-Wei(董新伟), Song You(宋友), Wang Ke-Feng(王克锋), Liu Jun-Ming(刘俊明), and Jiang Xiang-Ping(江向平). Ferrimagnetism and abnormal spin–lattice coupling in dilute magnetic ferroelectric (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co[J]. Chin. Phys. B, 2011, 20(2): 27502-027502.

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Ferrimagnetism and abnormal spin–lattice coupling in dilute magnetic ferroelectric (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co

Ferrimagnetism and abnormal spin–lattice coupling in dilute magnetic ferroelectric (Bi_0.46Na_0.46Ba_0.08)TiO₃:Co

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