运用激光超声的方法测定了五种不同掺杂的巨磁锰氧化物La0.7Ca0.3Mn1-xCrxO3(0.01≤x≤0.60)室温(300 K)下的超声纵波声速.结合热导率的数据,对声速随掺杂浓度的变化原因进行了深入的分析.得到在顺磁绝缘态Cr3+离子的掺入造成了晶格局部涨落的变化,低掺杂使得晶格局部涨落增强,声子U散射弛豫时间减小.
参考文献
| [1] | A Maignan;C Martin;B Raveau .[J].Z Phys B:Condens Matter,1997,102:19. |
| [2] | K Ghosh;S B Ogale;R Ramesh;R L Greene,T Venkatesan,K M Gapchup,Ravi Bathe,S I Patil .[J].Physical Review B:Condensed Matter,1999,59:533. |
| [3] | Mark Rubinstein;D J Gillespie;John E Snyder;Terry M Tritt .[J].Physical Review B:Condensed Matter,1997,56:5412. |
| [4] | A Maignan;F Damay;A Barnab;C Martin,M Hervieu,B Raveau .[J].Philosophical Transactions of The Royal Society of London Series B,1998,356:1635. |
| [5] | Ji-Wen Feng;Lian-Pin Hwang .Ferromagnetic cluster behaviors and magnetoresistance in Ni-doped LaSrMnO_(3) systems[J].Applied physics letters,1999(11):1592-1594. |
| [6] | Z -H Wang;B -G Shen;N Tang;J -W Cai,T -H Ji,J -G Zhao .[J].Journal of Applied Physics,1999,85:5399. |
| [7] | J Blasco;J Gareia;J M de Teresa et al.[J].Physical Review B:Condensed Matter,1998,57:7841. |
| [8] | K H Ahn;X W Wu;K Liu et al.[J].Physical Review B:Condensed Matter,1996,54:15299. |
| [9] | J Cai;C Wong;B Shen;J Zhao,W Zhan .[J].Applied Physics Letters,1997,71:1727. |
| [10] | S B Ogale;R Shreekala;Ravi Bathe;S K Da etc.[J].Physical Review B:Condensed Matter,1998,57:7841. |
| [11] | Young Sun;Xiaojun Xu;Lei Zheng;Yuheng Zhang .[J].Physical Review B:Condensed Matter,1999,60:12317. |
| [12] | N Garathri;A K Raychaudhuri;S K Tiwary;R Gundakar etc.[J].Physical Review B:Condensed Matter,1997,56:1345. |
| [13] | O Cabeza;M Long;C Severac;M A Bari .[J].Journal of Physics:Condensed Matter,1999,11:2569. |
| [14] | B Raveau;A Maignan;C Martin .[J].Journal of Solid State Chemistry,1997,130:162. |
| [15] | Kessler L W;Palermo P R;Korpel A;G Wade.1972 in Acoustic Imaging[M].New York Plenum:451. |
| [16] | 李宜德,杜英磊,李纪焕,吴柏枚.光声谱研究多孔碳化硅的能带特性[J].物理学报,2003(05):1260-1263. |
| [17] | 李宜德 .光声技术研究多孔碳化硅的能带特性和巨磁阻材料的力学性质[D].中国科学技术大学,2003. |
| [18] | 李宜德,杜英磊,吴柏枚.激光超声系统的定标[J].安徽大学学报（自然科学版）,2005(06):57-60. |
| [19] | 郑卫华,吴柏枚,李波,杨东升,曹烈兆.La0.7Ca0.3Mn1-xCrxO3 （0.01≤x≤0.60）的低温热导[J].低温物理学报,2002(03):230-235. |
| [20] | Hiroyuki Fujishiro;Tetsuo Fukase;Manabu Ikebe .[J].Journal of the Physical Society of Japan,2001,70:628. |
| [21] | 柴一晟,杨宏顺,刘剑,余旻,曹烈兆.电子型超导体Nd1.85Ce0.15CuO4单晶输运性质研究[J].低温物理学报,2003(04):267-271. |
| [22] | 余勇,阮可青,黄胜利,钱朔,柴一晟,杨宏顺,曹烈兆.Nd2-xSrxNiO4多晶输运性质的研究[J].低温物理学报,2004(03):199-204. |
| [23] | 李波;吴柏枚;高惠平;王明,杜衎,王小平 .[J].低温物理学报,2005,27(08) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%