通过对样品磁化强度-温度(M-T)曲线、磁化强度-磁场强度(M-H)曲线、电阻率-温度(ρ-T)曲线及部分样品ESR谱的测量, 研究了Mn位W掺杂对CaMn1-xWxO3(x=0.05, 0.07, 0.10, 0.12, 0.14, 0.16, 0.20)体系磁结构的影响. 结果表明, 随着W掺杂量的增加, 体系磁结构发生了复杂的变化过程. 当掺杂量x≤0.07时, 体系为铁磁(FM), 反铁磁(AFM)和顺磁(PM)态的共存, 随掺杂量增加, FM态减弱, AFM态增强;当x=0.10, 0.12时, 体系建立电荷有序(charge ordering, CO)态, AFM/CO态共存于相变温度以下, 且电荷有序温度TCO随掺杂量增加而增加;当x≥0.14时, 体系电荷有序(CO)态减弱并消失.
参考文献
| [1] | Rao CNR.;Cheetham AK.;Raveau B.;Arulraj A. .Charge ordering in the rare earth manganates: the experimental situation [Review][J].Journal of Physics. Condensed Matter,2000(7):R83-R106. |
| [2] | Rao C N R;Cheetham A K .Materials science:Charge ordering in manganates[J].Science,1997,276(09):911. |
| [3] | Adriana Moreo;Seiji Yunoki;Elbio Dagotto .Phase separation scenario for manganese oxides and related materials[J].Science,1999(5410):2034-2040. |
| [4] | 李宝河,鲜于文旭,张健,马廷钧.钙钛矿型稀土锰氧化物La0.7Sr0.3FexMn1-xO3的磁性和巨磁电阻效应[J].中国稀土学报,2001(02):174-177. |
| [5] | 刘宜华,王成建,张汝贞,栾开政,岳龙强,梅良膜.La-Sm-Ca-Mn-O的晶格效应[J].中国稀土学报,2001(05):418-421. |
| [6] | 崔旭高,夏洪旭,张世远,杨名,康琳,杨森祖.Nd-Sr-Mn-O钙态矿锰氧化物的低场磁电阻效应[J].中国稀土学报,2003(01):31-35. |
| [7] | 任世伟,王爱坤,孙敬伟,赵慈,李志清,白海力.La0.7Ca0.3MnO3薄膜庞磁电阻（CMR）现象的分析[J].中国稀土学报,2003(04):391-394. |
| [8] | 刘宁,童伟,张裕恒.La0.7-xGdxSr0.3MnO3中的相分离和输运行为[J].中国稀土学报,2003(05):512-517. |
| [9] | 彭振生.La2/3Ca1/3MnO3中的输运机制与CMR效应[J].中国稀土学报,2003(06):664-667. |
| [10] | 刘宁,高贵珍,童伟,张裕恒.A位的Gd掺杂对La0.7Sr0.3MnO3体系磁电性质的影响[J].物理学报,2003(12):3168-3175. |
| [11] | 刘宁,徐素军,郭焕银,童伟,张裕恒.A位的Sm掺杂对La0.67Sr0.33MnO3体系磁电性质的影响[J].物理学报,2005(02):912-919. |
| [12] | 蔡之让,刘宁,童伟,张裕恒.Dy的高掺杂对La0.7Sr0.3MnO3体系磁电性质的影响[J].物理学报,2005(02):920-929. |
| [13] | 王志宏,蔡建旺,沈保根,赵见高,詹文山.自旋玻璃锰氧化物La0.67Ca0.33（Mn，Fe）O3中的分步磁化和超大磁电阻[J].物理学报,1999(04):757-762. |
| [14] | 李广,汤萍,孙霞,姜勇,陈岳,王胜,黄真,袁松柳.La2/3Ca1/3Mn1-xCuxO3（x=0.15）系统低温下的电阻极小值现象及其起因[J].物理学报,1999(03):505-510. |
| [15] | 郭焕银,刘宁,徐素军,童伟,张裕恒.掺杂少量Sm时La0.67-xSmxSr0.33MnO3（0.00≤x≤0.30）的磁电性质[J].硅酸盐学报,2004(12):1481-1485,1495. |
| [16] | Zener C .Interaction between the d-shells in the transition metals.II.Ferromagnetic compounds of manganese with perovskite structure[J].Physical Review,1951,82(03):403. |
| [17] | Millis A J .Lattice effects in magnetoresistive manganese perovskites[J].Nature,1998,392(12):147. |
| [18] | Millis A J;Littlewood P B;Shraiman B I .Double exchange alone does not explain the resistivity of La1-xSrxMnO3[J].Physical Review Letters,1995,74(25):5144. |
| [19] | Hejtmánek J;Jirák Z;Marysko M .Interplay between transport,magnetic,and ordering phenomena in Sm1-xCaxMnO3[J].Physical Review B,1999,60(20):14057. |
| [20] | Khomskii DI.;Kugel KI. .Why stripes? Spontaneous formation of inhomogeneous structures due to elastic interactions[J].EPL,2001(2):208-213. |
| [21] | Ahn KH.;Millis AJ. .Effects of uniaxial strain in LaMnO3 - art. no. 114103[J].Physical Review.B.Condensed Matter,2001(11):5103-0. |
| [22] | Levy P.;Polla G.;Vega D.;Leyva G.;Lanza H.;Freitas RS. Ghivelder L.;Parisi F. .Controlled phase separation in La0.5Ca0.5MnO3[J].Physical Review.B.Condensed Matter,2000(10):6437-6441. |
| [23] | Podzorov V.;Kiryukhin V.;Gershenson ME.;Cheong SW.;Kim BG. .Martensitic accommodation strain and the metal-insulator transition in manganites - art. no. 140406[J].Physical Review.B.Condensed Matter,2001(14):0406-0. |
| [24] | Amlan Biswas;Rajeswari M;Srivastava R C et al.Greene strain-driven charge-ordered state in La0.67Ca0.33MnO3[J].Physical Review B,2001,63(18):184424. |
| [25] | Calderon MJ.;Millis AJ.;Ahn KH. .Strain selection of charge and orbital ordering patterns in half-doped manganites - art. no. 100401[J].Physical review, B. Condensed matter and materials physics,2003(10):401-0. |
| [26] | Raveau B.;Martin C.;Maignan A. .INSULATOR-METAL TRANSITION INDUCED BY CR AND CO DOPING IN PR0.5CA0.5MNO3[J].International Journal of Quantum Chemistry,1997(1):162-166. |
| [27] | Vanitha P V;Arulraj A;Raju A R.Effect of substitution of Ru4+ in the B-site of rare earth manganates on charge-ordering[J].Comptes Rendus de l'Académie des Sciences Paris,1999:595. |
| [28] | Vanitha PV.;Natarajan S.;Rao CNR.;Singh RS. .Distinction between two types of charge-ordered states in the rare earth manganates, Ln(0.5)A(0.5)MnO(3), based on chemical melting[J].International Journal of Quantum Chemistry,1998(2):365-368. |
| [29] | Martin C.;Hervieu M.;Raveau B.;Hejtmanek J.;Maignan A. .Electron doping in CaMnO3 induced by Mo for Mn substitution: An efficient route to orbital and charge ordering - art. no. 100406[J].Physical Review.B.Condensed Matter,2001(10):100406-1-100406-4. |
| [30] | Zeng Z;Greenblatt M;Croft M .Charge ordering and magnetoresistance in Ca1-xCexMnO3[J].Physical Review B,2001,63(22):224410. |
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%