热压处理对Nd0.7Sr0.3MnO3陶瓷磁电输运影响

陈顺生; 杨昌平; 阚芝兰; Medvedeva I V; Marchenkov S

doi:10.7498/aps.61.186202

摘要

在温度1273 K、压强9 GPa条件下对固相烧结Nd0.7Sr0.3MnO3陶瓷样品进行热压处理. 结果发现, 处理后样品的晶体结构和空间群没有改变, 但晶胞参数和结构参数, 特别是样品的显微结构发生了很大变化. 这些变化对样品的磁电输运产生显著影响: 在磁性上, 热压样品的低温饱和磁矩减小并出现磁矩排列弥散特点; 在电输运方面, 当负载电流小于1.5 mA时, 与烧结样品一样, 热压样品不产生电致电阻 (ER) 效应, 并在金属-绝缘体转变点出现最大磁电阻 (MR). 但在低温下, 热压样品仍有较大MR值. 当负载电流超过1.5 mA时, 热压样品原R-T曲线中的电阻峰替变为一电阻平台, 且随负载电流增大, 平台逐渐宽化, 阻值减小, 出现ER行为. 有趣的是, 在外磁场作用下, 电阻平台随外场增大逐渐变窄、消失并又演变为一电阻峰. 这些奇特的输运行为除与热压处理导致样品晶粒绝缘化有关外, 可能还与热压导致粒间相的形成有关.

关键词:

Abstract

The Nd0.7Sr0.3MnO3 compounds are treated at a thermal pressure (HTP) of temperature 1273 K and pressure 9 GPa. The results show that the crystal structure and space group of samples keep unchanged while the lattice and structural parameters, especially the microscopic structure change remarkably, which produces significant influence on magnetoelectric transport of the Nd0.7Sr0.3MnO3 ceramic. For electrical transport of the HTP sample, no electroresistance (ER) effect occurs when loaded current is less than 1.5 mA, however, an ER effect around 200% takes place when the loaded current goes up to more than 1.5 mA. Interestingly, the peak at -T curve disappears by replacing a platform, which can return to a peak if a magnetic field is applied again. The formation of intergranular phase and insulating behaviour of sample under thermal pressure condition are suggested to be responsible for the unique transport properties.

Keywords:

作者及机构信息

1.
湖北大学物理学与电子技术学院, 武汉 430062;

2.
黄石理工学院数理学院, 黄石 435003;

3.
Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Ekaterinburg 620219, Russia

基金项目: 国家自然科学基金(批准号: 11074067, 11174073)和教育部新世纪优秀人才支持计划(批准号: NCET-08-0674)资助的课题.

Authors and contacts

1.
Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China;

2.
School of Mathematics and Physics, Huangshi Institute Technology, Huangshi 435003, China;

3.
Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Ekaterinburg 620219, Russia

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 10774040, 11174073) and the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-08-0674).

参考文献

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[44]	Arnold Z, Kamenev K, Ibarra M R, Algarabel P A, Marquina C, Blasco J, García J 1995 Appl. Phys. Lett. 67 2875
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施引文献

[1]	Medvedeva I V, Dyachkova T V, Tyutyunnik A P, Zaynulin Y G, Marchenkov V V, Marchenkova E B, Fomina K A, Yang C P, Chen S S, Baerner K 2012 Physica B 407 153
[2]	Senff D, Schumann O, Benomar M, Kriener M, Lorenz T, Sidis Y, Habicht K, Link P, Braden M 2008 Phys. Rev. B 77 184413
[3]	Sawa A, Fujii T, Kawasaki M, Tokura Y 2006 Appl. Phys. Lett. 88 232112
[4]	Moshnyaga V, Sudheendra L, Lebedev O I, Köter S A, Gehrke K, Shapoval O, Belenchuk A, Damaschke B, van Tendeloo G, Samwer K 2006 Phys. Rev. Lett. 97 107205
[5]	Yang Z Q, Zhang Y Q, Aarts J, Wu M Y, Zandbergen H W 2006 Appl. Phys. Lett. 88 072507
[6]	Hazama H, Goto T, Nemoto Y, Tomioka Y, Asamitsu A, Tokura Y 2004 Phys. Rev. B 69 064406
[7]	Jonker G H, van Santen J H 1950 Physica 16 337
[8]	Millis A J, Littlewood P B, Shraiman B I 1995 Phys. Rev. Lett. 74 5144
[9]	Kozlenko D P, Goncharenko I N, Savenko B N, Voronin V I 2004 J. Phys.: Condens. Matter 16 6755
[10]	Moritomo Y, Kuwahara H, Tomioka Y 1997 Phys. Rev. B 55 7549
[11]	Cui C W, Tyson T A, Zhong Z, Carlo J P, Qin Y H 2003 Phys. Rev. B 67 104107
[12]	Kreisel J, Dkhil B, Bouvier P, Kiat J M 2002 Phys. Rev. B 65 172101
[13]	Kozlenko D P, Glazkov V P, Jirák Z, Savenko B N 2003 J. Magn. Magn. Mater. 267 120
[14]	Congeduti A, Postorino P, Dore P, Nucara A, Lupi S, Mercone S, Calvani P, Kumar A, Sarma D D 2001 Phys. Rev. B 63 184410
[15]	Trukhanova S V, Kozlenkob D P, Trukhanov A V 2008 J. Magn. Magn. Mater. 320 e88
[16]	Garbarino G, Acha C, Vega D, Leyva G, Polla G, Martin C, Maignan A, Raveau B 2004 Phys. Rev. B 70 014414
[17]	Manoj Kumar, Usha Chandra, Parthasarathy G 2006 Mater. Lett. 60N 2066
[18]	Hwang H Y, Palstra T T M, Cheong S W, Batlogg B 1995 Phys. Rev. B 52 15046
[19]	Laukhin V, Fontcuberta J, García-Muñoz J L, Obradors X 1997 Phys. Rev. B 56 R10009
[20]	Meneghini C, Levy D, Mobilio S, Ortolani M, Nunez Reguero M, Ashwani Kumar, Sarma D D 2001 Phys. Rev. B 65 012111
[21]	Chen S S, Yang C P, Xiao H B, Xu L F, Ma C 2012 Acta Phys. Sin. 61 147301 (in Chinese) [陈顺生, 杨昌平, 肖海波, 徐玲芳, 马厂 2012 物理学报 61 147301]
[22]	Chen S S, Yang C P, Luo X J, Bärner K, Medvedeva I V 2012 Chin. Phys. Lett. 29 027302
[23]	Yang C P, Chen S S, Dai Q, Song X P 2011 Acta Phys. Sin. 60 117202 (in Chinese) [杨昌平, 陈顺生, 戴琪, 宋学平 2011 物理学报 60 117202]
[24]	Chen S S, Huang C, Wang R L, Yang C P, Medvedeva I V, Sun Z G 2011 Acta Phys. Sin. 60 037304 (in Chinese) [陈顺生, 黄昌, 王瑞龙, 杨昌平, Medvedeva I V, 孙志刚 2011 物理学报 60 037304]
[25]	Chen S S, Yang C P, Xu L F, Yang F J, Wang H B, Wang H, Xiong L B, Yu Y, Medvedeva I V, Bärner K 2010 Solid State Commun. 150 240
[26]	Chen S S 2010 M. S. Dissertation (Wuhan: Hubei University) (in Chinese) [陈顺生 2010 硕士学位论文 (武汉: 湖北大学)]
[27]	Krishnamoorthy C, Sethupathi K, Sankaranarayanan V, Nirmala R, Malik S K 2007 J. Magn. Magn. Mater. 308 28
[28]	Chen S S, Yang C P, Xu L F, Tang S L 2010 J. Mater. Sci. Technol. 26 721
[29]	Venkatesh R, Sethupathi K, Pattabiraman M, Rangarajan G 2007 J. Magn. Magn. Mater. 310 2813
[30]	Chen S S, Yang C P, Wang H, Medvedeva I V, Bärner K 2010 Mat. Sci. Eng. B 172 167
[31]	Yang C P, Chen S S, Dai Q, Guo D H, Wang H 2007 Acta Phys. Sin. 56 4908 (in Chinese) [杨昌平, 陈顺生, 戴琪, 郭定和, 王浩 2007 物理学报 56 4908]
[32]	Yang C P, Chen S S, Zhou Z H, Xu L F, Wang H, Hu J F, Morchshakov V, Bärner K 2007 J. Appl. Phys. 101 063909
[33]	Chen S S, Yang C P, Deng H, Sun Z G 2008 Acta Phys. Sin. 57 3798 (in Chinese) [陈顺生, 杨昌平, 邓恒, 孙志刚 2008 物理学报 57 3798]
[34]	Cui Congwu, Tyson Trevor A 2004 Phys. Rev. B 70 094409
[35]	Asamitsu A, Tomioka T, Kuwahara H, Tokura Y 1997 Nature 388 50
[36]	Markovich V, Rozenberg E, Yuzhelevski Y, Jung G, Gorodetsky G 2001 Appl. Phys. Lett. 78 3499
[37]	Sun J Z 1999 J. Magn. Magn. Mater. 202 157
[38]	Ma Y Q, Song W H, Dai J M, Zhang R L, Yang J, Zhao B C, Sheng Z G, Lu W J, Du J J, Sun Y P 2004 Phys. Rev. B 70 054413
[39]	Zhang X P, Xie B T, Xiao Y S, Yang B, Lang P L, Zhao Y G 2005 Appl. Phys. Lett. 87 72506
[40]	Furukuwa N 1994 J. Phys. Soc. Jpn. 63 3214
[41]	Hwang H Y, Cheong S W, Ong N P, Batlogg B 1996 Phys. Rev. Lett. 77 2041
[42]	Li X W, Gupta A, Xiao G, Gong G Q 1997 Appl. Phys. Lett. 71 1124
[43]	Gupta A, Gong G Q, Xiao G, Duncombe P R, Lecoeur P, Trouilloud P, Wang Y Y, Dravid V P, Sun J Z 1996 Phys. Rev. B 54 R15629
[44]	Arnold Z, Kamenev K, Ibarra M R, Algarabel P A, Marquina C, Blasco J, García J 1995 Appl. Phys. Lett. 67 2875
[45]	Neumeier J J, Hundley M F, Thompson J D, Heffner R H 1995 Phys. Rev. B 52 R7006
[46]	Markovich V, Rozenberg E, Gorodetsky G, Greenblatt M, McCarroll W H 2001 Phys. Rev. B 63 054423
[47]	Terashita H, Neumeier J J 2001 Phys. Rev. B 63 174436
[48]	Mahendiran R, Mahesh R, Raychaudhuri A K, Rao C N R 1996 Phys. Rev. B 53 12160
[49]	Aarts J, Freisem S, Hendrikx R, Zandbergen H W 1998 Appl. Phys. Lett. 72 2975

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