采用固相反应法制备了La0.6Sr0.15Na0.1□0.15MnO3+xAgNO3 (x=0.08、0.16、1.00,x为物质的量比,□代表空位)系列复合材料样品,对复合样品的相结构、磁性质及其磁电阻效应进行了研究.通过相结构的研究发现:复合样品近似呈现La0.6Sr0.15Na0.1□0.15MnO/Ag/Mn3O4的特殊复合结构.通过对磁电阻的研究发现:复合样品不同程度地提高了母体样品的MR峰值,降低了峰值温度,使其更接近室温.在204～280K的温度范围内和1.8T外磁场作用下,当x=0.08时,MR保持在(4.70±0.25)％;x=0.16时,MR保持在(7.20±0.28)％.所以,复合样品较之母体样品,磁电阻的温度稳定性有了很大提高.
参考文献
| [1] | Ziese M. .Extrinsic magnetotransport phenomena in ferromagnetic oxides [Review][J].Reports on Progress in Physics,2002(2):143-249. |
| [2] | Kou Zhi-Qi,Di Nai-Li,Ma Xiao,Li Qing-An,Cheng Zhao-Hua.Enhancement of "intrinsic" magnetoresistance ratio and activation energy of La0.67Ca0.33MnO3 single crystals by Fe doping[J].中国物理（英文版）,2005(08):1653-1656. |
| [3] | Peng Z S;Wang G Y;Tang Y G et al.Enhancement of roomtemperature magnetuvesistance in La0.5 Sm0.2 Sr0.3 MnO3 /(Ag2O)x/2[J].Rare Metals,2010,29(01):45. |
| [4] | SONG Qixiang,NIU Xiaofei,WANG Guiying,TANG Yonggang,CAI Zhirang,PENG Zhensheng.Enhancement of room-temperature magnetoresistance in La_(0.6)Dy_(0.1)Sr_(0.3)MnO_3/Ag_x[J].稀有金属(英文版),2010(02):126-131. |
| [5] | B. Vertruyen;R. Cloots;A. Rulmont;G. Dhalenne;M. Ausloos;Ph. Vanderbemden .Magnetotransport properties of a single grain boundary in a bulk La-Ca-Mn-O material[J].Journal of Applied Physics,2001(11):5692-5697. |
| [6] | G. D. Tang;D. L. Hou;W. Chen;P. Hao;G. H. Liu;S. P. Liu;X. L. Zhang;L. Q. Xu .Estimation of Mn~(4+) ion content ratio in self-doped compound La_(1－x)MnO_(3-δ)[J].Applied physics letters,2007(15):152503.1-152503.3. |
| [7] | Liu S P;Tang G D;Li Z Z et al.Study of the structure,magnetic properties and free energy of the three phase composites La0.7-y-z Sr0.3-x Mn1-δ/3 O3-δ / (La2 O3) y/2 / (La (OH) 3)x[J].Journal of Alloys and Compounds,2011,509(05):2320. |
| [8] | 刘俊明,王克锋.稀土掺杂锰氧化物庞磁电阻效应[J].物理学进展,2005(01):82-130. |
| [9] | 王克锋,刘俊明.稀土锰氧化物的低场磁电阻效应[J].物理学进展,2003(02):192-211. |
| [10] | Siwach PK;Singh HK;Srivastava ON .Low field magnetotransport in manganites[J].Journal of Physics. Condensed Matter,2008(27):273201-1-273201-43-0. |
| [11] | Shreekala R;Rajeswari M et al.Improved properties of Lay3 Ca1/3 MnO3 thin films by addition of silver[J].Applied Physics Letters,1999,74(19):2857. |
| [12] | Tang T;Zhang S Y et al.Giant magnetoresistance of bulk polycrystalline La0.8a3 Na0.167 MnO3 with Ag2O addition[J].Journal of Alloys and Compounds,2003,353(1-2):91. |
| [13] | 唐贵德,刘兴民,刘力虎,赵旭,白一鸣,潘成福,侯登录,余勇,禹日成,靳常青.La0.67Sr0.33-xAgxMnO3的室温磁电阻效应[J].功能材料,2004(04):434-436. |
| [14] | Ye SL.;Song WH.;Dai JM.;Wang KY.;Wang SG.;Zhang CL.;Du JJ.;Sun YP. Fang J. .Effect of Ag substitution on the transport property and magneto resistance of LaMnO3[J].Journal of Magnetism and Magnetic Materials,2002(1):26-33. |
| [15] | 原晓波,刘宜华,黄宝歆,王成建,梅良模.La0.67Ba0.33MnO3中Ag的掺杂效应[J].功能材料,2005(01):32-34. |
| [16] | Zhang N.;Zhong W.;Xing DY.;Du YW.;Ding WP. .TUNNEL-TYPE GIANT MAGNETORESISTANCE IN THE GRANULAR PEROVSKITE LA0.85SR0.15MNO3[J].Physical Review.B.Condensed Matter,1997(13):8138-8142. |
| [17] | WANG Guiying,YAN Guoqing,YANG Jie,WANG Wenqi,TANG Yonggang,SONG Qixiang,ZHANG Mingyu,PENG Zhensheng.Magnetoresistance enhancement and temperature stability of magnetoresistance in La1-x(Sr1-yNay)xMnO3[J].稀有金属（英文版）,2012(04):387-391. |
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