La0.4Ca0.6MnO3中Mn-位Fe和Cr掺杂对磁性质的影响

胡妮; 刘雍; 汤五丰; 裴玲; 方鹏飞; 熊锐; 石兢

doi:10.7498/aps.63.237502

摘要

研究了Fe和Cr掺杂对La0.4Ca0.6MnO3 中电荷有序反铁磁基态的调控作用. 磁性质的测量结果表明, 两种离子掺杂均能有效抑制原型样品中的长程电荷有序相, 但是Fe离子掺杂样品均具有反铁磁的基态, 而Cr掺杂样品中则出现了显著的铁磁性. 结合电输运测量结果显示, Cr掺杂引起的铁磁态同时具有金属性, 表明其中是电子双交换作用占主导. 对比两种掺杂离子的电子结构发现, Cr离子空的eg电子轨道促进了电子双交换作用, 而Fe掺杂则只是引入了不同的自旋交换作用, 导致自旋无序.

关键词:

磁性氧化物 /
反铁磁

Abstract

We have investigated the Fe/Cr doping effects on the magnetic property of a charge-ordered antiferromagnetic manganite La0.4Ca0.6MnO3. Magnetic measurements reveal interesting doping effects. While all the Fe-doped samples still have antiferromagnetic ground state, strong ferromagnetic tendency can be seen in the Cr-doped samples. Meanwhile, Cr-doped samples show clear metallic transport behavior, indicating an inherent double exchange mechanism responsible for the ferromagnetic metallic state. We thus propose that the magnetic exchange interaction between Mn and dopants, and the d-orbital electronic structure of Cr/Fe are essential for the distinct doping effect of Fe and Cr.

Keywords:

magnetic oxide /
antiferromagnetic

作者及机构信息

1.
武汉大学物理科学与技术学院, 人工微结构教育部重点实验室, 武汉 430072;

2.
湖北工业大学理学院, 武汉 430068

基金项目: 国家自然科学基金(批准号:11304091)资助的课题.

Authors and contacts

1.
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China;

2.
School of Science, Hubei University of Technology, Wuhan 430068, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11304091).

参考文献

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[19]	Lu C L, Hu N, Yang M, Xia S C, Wang H W, Wang J F, Xia Z C, Liu J M 2014 Sci. Rep. 4 4902
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[22]	Martinelli A, Ferretti M, Castellano C, Cimberle M R, Ritter C 2008 J. Phys.: Condens. Matter 20 145210
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[24]	Kou Z Q, Di N L, Ma X, Li Q A, Cheng Z H 2005 Chin. Phys. 14 1653
[25]	Hu N, Liu Y, Cheng L, Shi J, Xiong R 2011 Acta Phys. Sin. 60 017503 (in Chinese) [胡妮, 刘雍, 程莉, 石兢, 熊锐 2011 60 017503]
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[27]	Sudyoadsuk T, Suryanarayanan R, Winotai P 2004 J. Magn. Magn. Mater. 272 E1379
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[30]	Martin C, Maignan A, Hervieu M, Autret C, Raveau B, Khomskii D I 2001 Phys. Rev. B 63 174402

施引文献

[1]	Dagotto E, Hotta T, Moreo A 2001 Phys. Rep. 344 1
[2]	Shen J, Ward T Z, Yin L F 2013 Chin. Phys. B 22 017501
[3]	Liu Y K, Yin Y W, Li X G 2013 Chin Phys. B 22 087502
[4]	Zhang F H, Huang Z, Gao G Y, Chen P F, Wang L F, Tan X L, Wu W B 2010 Appl. Phys. Lett. 96 062507
[5]	Takubo N, Miyano K 2007 Phys. Rev. B 76 184445
[6]	Rini M, Tobey R, Dean N, Itatani J, Tomioka Y, Tokura Y, Schoenlein R W, Cavalleri A 2007 Nature 449 72
[7]	Pradhan K, Mukherjee A, Majumdar P 2007 Phys. Rev. Lett. 99 147206
[8]	Banerjee A, Mukherjee K, Kumar K, Chaddah P 2006 Phys. Rev. B 74 224445
[9]	Moritomo Y, Murakami K, Ishikawa H, Hanawa M, Nakamura A, Ohoyama K 2004 Phys. Rev. B 69 212407
[10]	Kim J S, Kim D C, McIntosh G C, Chu S W, Park Y W, Kim B J, Kim Y C, Maignan A, Raveau B 2002 Phys. Rev. B 66 224427
[11]	Markovich V, Fita I, Puzniak R, Rozenberg E, Wisniewski A, Martin C, Maignan A, Hervvieu M, Raveau B, Gorodetsky G 2002 Phys. Rev. B 65 224415
[12]	Markovich V, Rozenberg E, Gorodetsky G, Martin C, Maignan A, Hervieu M, Raveau B 2001 Phys. Rev. B 64 224410
[13]	Martin C, Maignan A, Hervieu M, Autret C, Raveau B, Khomskii D I 2001 Phys. Rev. B 63 174402
[14]	Hébert S, Maignan A, Martin C, Raveau B 2002 Solid State Commun. 121 229
[15]	Guo H Y, Liu N, Cai Z R, Zhang Y H 2006 Acta Phys. Sin. 55 865 (in Chinese) [郭焕银, 刘宁, 蔡之让, 张裕恒 2006 55 865]
[16]	Lu C L, Chen X, Dong S, Wang K F, Cai H L, Liu J M 2009 Phys. Rev. B 79 245105
[17]	Wang K F, Wang Y, Wang L F, Dong S, Li D, Zhang Z D, Yu H, Li Q C, Liu J M 2006 Phys. Rev. B 73 134411
[18]	Hu N, Lu C L, Wang K F, Cheng L, Liu Y, Liu J M, Xiong R, Shi J 2011 Appl. Phys. A 103 485
[19]	Lu C L, Hu N, Yang M, Xia S C, Wang H W, Wang J F, Xia Z C, Liu J M 2014 Sci. Rep. 4 4902
[20]	Shannon R D 1976 Acta Crystallogr. Ser. A: Cryst. Phys. Diffr. Theor. Gen. Crystallogr. A 32 751
[21]	Studer F, Toulemonde O, Goedkoop J B, Barnabe A, Raveau B 1999 Jpn. J. Appl. Phys. Part I 38 377
[22]	Martinelli A, Ferretti M, Castellano C, Cimberle M R, Ritter C 2008 J. Phys.: Condens. Matter 20 145210
[23]	Ramesha K, Thangadurai V, Sutar D, Subramanyam S V, Subbanna G N, Gopalakrishnan J 2000 Mater. Res. Bull. 35 559
[24]	Kou Z Q, Di N L, Ma X, Li Q A, Cheng Z H 2005 Chin. Phys. 14 1653
[25]	Hu N, Liu Y, Cheng L, Shi J, Xiong R 2011 Acta Phys. Sin. 60 017503 (in Chinese) [胡妮, 刘雍, 程莉, 石兢, 熊锐 2011 60 017503]
[26]	Wenger L E, Tsoi G M, Suryanarayanan R, Sudyoadsuk T 2008 J. Appl. Phys. 103 07F723
[27]	Sudyoadsuk T, Suryanarayanan R, Winotai P 2004 J. Magn. Magn. Mater. 272 E1379
[28]	Kirkpatrick S 1973 Rev. Mod. Phys. 45 574
[29]	Kang J S, Kim J H, Sekiyama A, Kasai A, Suga S, Han S W, Kim K H, Choi E J, Kimura T, Muro T, Saitoh Y, Olson C G, Shim J H, Min B I 2003 Phys. Rev. B 68 012410
[30]	Martin C, Maignan A, Hervieu M, Autret C, Raveau B, Khomskii D I 2001 Phys. Rev. B 63 174402

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