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应变作用下量子顺电材料EuTiO3的磁电性质

周文亮 夏坤 许达 仲崇贵 董正超 方靖淮

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应变作用下量子顺电材料EuTiO3的磁电性质

周文亮, 夏坤, 许达, 仲崇贵, 董正超, 方靖淮

Magnetoelectric properties of quantum paraelectric EuTiO3 materials on the strain effect

Zhou Wen-Liang, Xia Kun, Xu Da, Zhong Chong-Gui, Dong Zheng-Chao, Fang Jing-Huai
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  • 由于磁性和介电性质的强烈耦合, 量子顺电材料EuTiO3材料的研究近来倍受人们的关注. 本文通过运用基于密度泛函理论的第一性原理计算研究了量子顺电(PE) 材料EuTiO3的磁性和电子结构, 分析了应变对磁性和结构相变的作用, 从而探讨了该材料中可能的磁电耦合机理. 结果发现, 在无应变状态下, EuTiO3处于顺电立方-G型反铁磁性态, 而对于c轴方向的无论张应变还是压应变, 当应变增加到一定程度时, 由于Ti 3d空轨道与周围O 2p 电子的杂化平衡被打破, EuTiO3将相变到铁电( FE) 四方-铁磁结构, 显示了强烈的自旋-晶格耦合效应.
    Because of the strong coupling between the magnetic and dielectric properties, the study of quantum paraelectric EuTiO3 has attracted more and more attention in both theoretical and experimental research recently. In this paper, the first principles based on the density functional theory within the generalized gradient approxiamtion is used to investigate the magnetic and electronic structure of quantum paraelectric EuTiO3, and to analyze the effects of the strain on the magnetic and strutural phase transition, in turn to discuss the possible magnetoelectric coupling mechanism of this material. The calculations show that EuTiO3 with the strain-free is in a paraelectric cubic and G-type antiferromagnetic state at low temperature, while appling either compressive or tensile strain along the c-axis to it, the balance of hybridization between Ti 3d and O 2p orbit will be breaken and EuTiO3 will transite from paraelectric and G-antiferromagnetic to ferroelectric-ferromagnetic structure as the strain is increased to a certain value. All those indicate the strong spin-lattice coupling effect in EuTiO3.
    • 基金项目: 国家自然科学基金 (批准号: 10974104, 50832002), 江苏省教育厅青蓝工程和 南通大学博士 科研 启动基金资助的课题.
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974104, 50832002), the Qing Lan Project of Education Department of Jiangsu Province, China, and the Initializiing Funds Project on Scientific Research of Doctors in Nantong University.
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  • [1]

    Ramesh R, Spaldin N A 2007 Nature Mater 6 21

    [2]

    Wang K F, Liu J M, Ren Z F 2009 Adv. Phys. 58 321

    [3]

    Ma J, Hu J M, Li Z, Nan C W 2011 Adv. Mater. 23 1062

    [4]

    Lee J H, Rabe K M 2010 Phys. Rev. Lett. 104 207204

    [5]

    Zhong C G, Jiang Q, Fang J H, Jiang X F, Luo L J 2009 Acta Phys. Sin. 58 7227 (in Chinese) [仲崇贵, 蒋青, 方靖淮, 江学范, 罗礼进 2009 物理学报 58 7227]

    [6]

    Katsufuji T, Takagi H 2001 Phys. Rev. B 64 054415

    [7]

    Jiang Q, Wu H 2003 J. Appl. Phys. 93 2121

    [8]

    Jiang Q, Wu H 2002 Chin. Phys. 11 1303

    [9]

    Shvartsman V V, Borisov P, Kleemann W, Kamba S, Katsufuji T 2010 Phys. Rev. B 81 064426

    [10]

    Kamba S, Nuzhnyy D, Vaněk P, Savinov M, Knek K, Shen Z, Šantavá E, Maca K, Sadowski M, Petzelt J 2007 Europhys. Lett. 80 27002

    [11]

    Fennie C J, Rabe K M 2006 Phys. Rev. Lett.97 267602

    [12]

    Lee J H, Fang L, Vlahos E, Ke X, Jung Y W, Kourkoutis L F, Kim J W, Ryan P J, Heeg T, Roeckerath M, Goian V, Bernhagen M, Uecker R, Hammel P C, Rabe K M, Kamba S, Schubert J, Freeland J W, Muller D A, Fennie C J, Schiffer P, Gopalan V, Johnston-Halperin E, Schlom D G 2010 Nature 466 954

    [13]

    Sushkov A O, Eckel S, Lamoreaux S K 2010 Phys. Rev. A 81 022104

    [14]

    Rushchanskii K Z, Kamba S, Goian V, Vanek P, Savinov M, Prokleska J, Nuzhnyy D, Knzek K, Laufek F, Eckel S, Lamoreaux S K, Sushkov A O, Lezaic M, Spaldin N A 2010 Nature Mater. 9 649

    [15]

    van Mechelen J L M, van der Marel D, Crassee I, Kolodiazhnyi T 2011 Phys. Rev. Lett. 106 217601

    [16]

    Morozovska A N, Glinchuk M D, Behera R K, Zaylichniy B Y, Deo C S, Eliseev E A 2011 arXiv: 1107.1785

    [17]

    Li T X, Zhang M, Wang G M, Guo H R, Li K S, Yan H 2011 Acta Phys. Sin. 60 087501 (in Chinese) [李廷先, 张铭, 王光明, 郭宏瑞, 李扩社, 严辉 2011 物理学报 60 087501]

    [18]

    Hlinka J, Ostapchuk T, Nuzhnyy D, Petzelt J, Kuzel P, Kadlec C, Vanek P, Ponomareva I, Bellaiche L 2008 Phys. Rev. Lett. 101 167402

    [19]

    Choi K J, Biegalski M, Li Y L, Sharan A, Schubert J, UeckerR, Reiche P, Chen Y B, Pan X Q, Gopalan V, Chen L Q, Schlom D G and Eom C B 2004 Science 306 1005

    [20]

    Xue W D, Chen Z Y, Yang C, Li Y R 2005 Acta Phys. Sin. 54 857 (in Chinese) [薛卫东, 陈召勇, 杨春, 李言荣 2005 物理学报 54 857]

    [21]

    Ranjan R, Nabi H S and Pentcheva R 2007 J Phys: Condens Matter. 19 406217

    [22]

    Yang J J, Zhao Y G, Tian H F, Luo L B, Zhang H Y, He Y J, Luo H S 2009 Appl. Phys. Lett. 94 212504

    [23]

    Sondena R, Ravindran P, Stonlen S, Grande T, Hanfland M 2006 Phys. Rev. B 74 144102

    [24]

    Ravindran P, Kjekshus A, Fjellvåg H, Delin A and Eriksson O 2002 Phys. Rev. B 65 06445

    [25]

    Blochl P E 1994 Phys. Rev. B 50 17953

    [26]

    Kresse G, Joubert D 1999 Phys. Rev. B 59 1758

    [27]

    Perdew J P, Burke K, Ernzerhof M 1996 Phys. Rev. Lett. 77 3865

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出版历程
  • 收稿日期:  2011-08-02
  • 修回日期:  2012-05-10
  • 刊出日期:  2012-05-05

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