V替代Mn对La0.45Ca0.55MnO3电荷有序相及自旋玻璃态的影响

王桂英; 郭焕银; 毛强; 杨刚; 彭振生

doi:10.7498/aps.59.8883

摘要

用固相反应法制备了La0.45Ca0.55Mn1－xVxO3(x=0.00,0.10)多晶样品. 通过X射线衍射谱、质量磁化强度-温度曲线、电子自旋共振谱,研究了V5+替代Mn3+/Mn4+对La0.45Ca0.55MnO3电荷有序相和自旋玻璃态的影响. 实验结果表明,当x=0.10时,不仅母体的电荷有序相基本破坏,而且母体在40 K左右出现的自旋玻璃态也被融化. 电荷有序相被破坏的主要原因是用V5+替代Mn3+/Mn4+后,增加了Mn3+与Mn4+的比例,使铁磁双交换作用优于反铁磁超交换作用;自旋玻璃态的融化是由于V替代Mn后破坏了反铁磁背景下有少量铁磁成分的自旋玻璃态的形成条件.

关键词:

Abstract

The polycrystalline samples of La0.45Ca0.55Mn1-xVxO3(x=0.00, 0.10) have been prepared by the solid-phase reaction. Efects of V5+ substitution for Mn3+/Mn4+ on charge ordering and spin-glass state are studied by X-ray diffraction spectrum, temperature dependence of magnetization, and electron spin resonance spectra. The results indicate that charge ordering of the original system is almost destroyed, and spin-glass state at about 40 K is melted by 10% of V substitution for Mn. The charge ordering phase is destroyed mainly because of V5+ ions substitution for Mn3+/Mn4+, which increases the ratio of Mn3+ to Mn4+ and so causes ferromagnetic double-exchange to be superior to antiferromagnetic super-exchange. In addition, the spin-glass state is melted because V substitution for Mn destroys the formation condition of spin-glass state that a small quantity of ferromagnetic components exist under the antiferromagnetic backgrornd.

Keywords:

作者及机构信息

(1)宿州学院电子与电气工程系,宿州 234000; (2)宿州学院电子与电气工程系,宿州 234000;中国科学技术大学合肥微尺度物质科学国家实验室,合肥 230026

基金项目: 国家自然科学基金重点项目(批准号:19934003)、安徽省教育厅自然科学基金重点项目(批准号:KJ2008A19ZC)和安徽省教育厅自然科学基金(批准号:KJ2009B281Z,KJ2010B228,KJ2010B229).

Authors and contacts

(1)Department of Electronic and Electrical Engineering, Suzhou University, Suzhou 234000, China; (2)Department of Electronic and Electrical Engineering, Suzhou University, Suzhou 234000, China;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China

参考文献

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施引文献

[1]	Jin S, Tiefel T H, McConmack M, Fastnacht R A, Ramesh R, Chen L H, Rao C N R, Raveau B 1994 Science 264 413
[2]	Autret C, Gervais M, Gervais F, Raimboux N, Simon P 2004 Solid State Sci. 6 815
[3]	Salamon M B, Jaime M 2001 Rev. Mod. Phys. 73 583
[4]	Zener C 1951 Phys. Rev. 82 403
[5]	Millis A J, Littlewoo P B, Shraiman B I 1995 Phys. Rev. Lett. 74 5144
[6]	Yu J, Zhang J C, Cao G X, Wang S P, Jing C, Cao S X 2006 Acta Phys. Sin. 55 5190 (in Chinese) [俞坚、张金仓、曹桂新、王仕鹏、敬超、曹世勋 2006 55 5190]
[7]	Peng Z S, Guo H Y, Cai Z R, Wang G Y 2008 Chin. J. Low Temp. Phys. 30 298 (in Chinese) [彭振生、郭焕银、蔡之让、王桂英 2008 低温 30 298]
[8]	Xu M X, Jiao Z K 1998 Acta Phys. Sin. 47 1007 (in Chinese) [徐明祥、焦正宽1998 47 1007]
[9]	Kiryukhin V, Casa D, Hill J P, Keimer B, Vigliante A, Tomioka Y, Tokura Y 1997 Nature 386 813
[10]	Li X J, Wang Q 2009 Acta Phys. Sin. 58 6482 (in Chinese) [李晓娟、王强 2009 58 6482]
[11]	Chen C H, Cheong S W 1996 Phys. Rev. Lett. 76 4042
[12]	Mori S, Chen C H, Cheong S W 1998 Nature 392 473
[13]	Peng Z S 2004 J. Rare Earths 22 232
[14]	Vanitha P V, Singh R S, Natarajan S, Rao C N R 1998 J. Solid State Chem. 137 365
[15]	Wang G Y, Yan G Q, Mao Q, Liu N, Peng Z S, Guo H Y 2009 Chin. Rare Earths 30 10 (in Chinese) [王桂英、严国清、毛强、刘宁、彭振生、郭焕银 2009 稀土 30 10]
[16]	Liang Y, Peng Z S, Yan G Q, Guo H Y, Cai Z R 2005 J. Rare Metals 28 513 (in Chinese) [梁燕、彭振生、严国清、郭焕银、蔡之让 2005 稀有金属 28 513]
[17]	Qu Z, Pi L, Fan J Y, Zhang B, Zhang T, Tan S, Zhang B, Zhang M, Zhang Y H 2007 Chin. Phys. 16 258
[18]	Shu M M, Cao S X, Gao T, Yuan S J, Kang B J, Yu L M, Zhang J C 2009 Acta Phys. Sin. 58 3309 (in Chinese) [舒苗苗、曹世勋、高湉、袁淑娟、康保娟、郁黎明、张金仓 2009 58 3309]
[19]	Liu N, Yan G Q, Cai Z R, Guo H Y, Peng Z S, Qu Z, Zhang Y H 2005 Chin. Sci. Bull. 50 1492 (in Chinese) [刘宁、严国清、蔡之让、郭焕银、彭振生、曲哲、张裕恒 2005 科学通报 50 1492]
[20]	Rivadulla F, Freita-Alvite M, Lopez-Quinteal M A 2002 J. Appl. Phys. 91 785
[21]	Kuwahara H, Tomioka Y, Asamitsu A, Moritomo Y, Tokura Y 1995 Science 270 961
[22]	Asamitsu A, TomiokaY, Kuwahara H, Tokura Y 1997 Nature 388 55
[23]	Tokunaga M, Miura N , TomikaY, Tokura Y 1998 Phys. Rev. B 57 5259
[24]	Damay F, Maignan A, Martin C, Raveah B 1997 J. Appl. Phys. 82 1458
[25]	Li R W, Sun J R, Wang Z H, Zhang S Y, Tong N, Shen B G 2000 J. Appl. Phys. 88 7041
[26]	Damay F, Martin C, Maignan A, Hervien M, Raveah B 1998 Appl. Phys. Lett. 73 3772
[27]	Zhu Y W, Fang J, Huang Z, Gao B J 2003 Chin. J. Low Temp. Phys. 25 151 (in Chinese) [朱永文、方军、黄真、高秉钧 2003 低温 25 151]
[28]	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]
[29]	Wang S P, Zhang J C, Cao G X, Yu J, Jing C, Cao S X 2006 Acta Phys. Sin. 55 367 (in Chinese) [王仕鹏、张金仓、曹桂新、俞坚、敬超、曹世勋 2006 55 367]
[30]	Kundaliya D C, Vij R, Kulkarni R G, Tulapurkar A A, Pinto R, Malik S K, Yelon W B 2003 J. Magn. Magn. Mater. 264 62
[31]	Chen Z P, Wang C M, Li Y F, Su Y L, Liu D W, Li T, Zhang J C 2009 Cryo. Supercond. 37 76 (in Chinese) [陈镇平、王春梅、李越峰、苏玉玲、刘德伟、李涛、张金仓 2009 低温与超导 37 76]

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