采用固相法制备了样品La0.3Ca0.7Mn0.96W0.04O3. 通过测量样品的M-T曲线、 M-H曲线和ESR曲线, 研究了La0.3Ca0.7Mn0.96W0.04O3的磁性质. 结果表明: 在265 K时形成电荷有序相(CO相). 当T＞265 K时, 表现为顺磁;当T＜225 K时, 表现为长程反铁磁(在AFM本底中存在少量FM成分), 形成少量FM相与AFM/CO相共存;从265～225 K, 随温度降低在电荷有序态下从顺磁向反铁磁转变. 测量了La0.3Ca0.7Mn0.96W0.04O3样品的ESR谱线宽, 样品的顺磁共振线宽ΔHPP的值随着温度的降低是增加的, 表明随着温度的降低样品的铁磁关联增强.
参考文献
| [1] | 彭振生,刘宁,蔡之让,郭焕银,童伟,张昌景,张裕恒.Influence of Gd Doping at A Site upon the Magnetic Structure of La0.7-xGdxSr0.3MnO3 Systems[J].中国物理快报(英文版),2003(04):564-567. |
| [2] | 蔡之让,刘宁,童伟,张裕恒.La0.7-xDyxSr0.3MnO3（0.00≤x≤0.70）的TCR研究[J].中国稀土学报,2004(06):760-764. |
| [3] | 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. |
| [4] | 彭振生;蔡之让;郭焕银 等.A位稀土离子(Sm,Gd,Dy)掺杂对La0.7Sr0.3MnO3居里温度的影响[J].中国稀土学报,2005,23:49. |
| [5] | 郭焕银,刘宁,徐素军,童伟,张裕恒.La0.67-xDyxSr0.33MnO3（0.00≤x≤0.30）中的晶格效应[J].稀有金属,2004(06):967-970. |
| [6] | 刘宁,严国清,童伟.Zn掺杂对LaMnO3体系磁性的影响[J].中国稀土学报,2005(05):609-612. |
| [7] | 刘宁,孙勇.La2/3Ca1/3MnO3中绝缘体-金属的转变：小极化子的退局域[J].稀有金属,2004(04):613-616. |
| [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] | 蔡之让,刘宁,童伟,徐素军,张裕恒.La0.7-xSmxSr0.3MnO3中的晶格效应[J].稀有金属,2004(05):847-851. |
| [10] | 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. |
| [11] | 郭焕银,刘宁,童伟.Dy和Sm部分替代La对La0.7Sr0.3MnO3磁电行为的影响[J].稀有金属,2005(02):143-148. |
| [12] | 朱志强,丁铁柱,赵倩,杨建华,白振华.钙钛矿氧化物La1-x MxCoO3-δ的电输运性能研究[J].稀有金属,2006(03):269-273. |
| [13] | 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. |
| [14] | Millis A J;Littlewoo P B;Shraiman B I .Double exchange alone does not explain the resistivity of La1-xSrxMnO3[J].Physical Review Letters,1995,74:5144. |
| [15] | Adriana Moreo;Seiji Yunoki;Elbio Dagotto .Phase separation scenario for manganese oxides and related materials[J].Science,1999(5410):2034-2040. |
| [16] | 束正煌,董锦明.轨道序对半掺杂锰氧化物光学性质的影响[J].物理学报,2003(11):2919-2922. |
| [17] | 田宏伟,胡小颖,郑伟涛.钙钛矿锰氧化物Y0.5Ca0.5Mn0.8Fe0.2O3的电子顺磁共振研究[J].稀有金属,2005(05):725-727. |
| [18] | 孔辉,谢津桥,张士龙,苏金瑞,朱长飞.La1/3Sr2/3Mn1-xFexO3（x=0,0.05）中电荷有序现象的超声研究[J].金属学报,2003(11):1183-1185. |
| [19] | Kamirez A P;Schiffer P;Cheong S W et al.Thermodynamic and electron diffraction signatures of charge and spin ordering in La1-xCaxMnO3[J].Physical Review Letters,1996,76(17):3188. |
| [20] | Radaelli PG.;Capogna L.;Cheong SW.;Marezio M.;Cox DE. .Wigner-crystal and bi-stripe models for the magnetic and crystallographic superstructures of La0.333Ca0.667MnO3[J].Physical Review.B.Condensed Matter,1999(22):14440-14450. |
| [21] | Wang R;Gui J;Zhu Y et al.Orientational domains at room temperature in La0.33Ca0.67MnO3 perovskite[J].Wuhan Univ J Natural Sci,1999,4(04):415. |
| [22] | Joshi J P;Gupta R-Sood A K et al.Temperature-dependent electron paramagnetic resonance studies of Charge-ordered Nd0.5Ca0.5MnO3[J].Physical Review B,2001,65(02):24410-24411. |
| [23] | 梁燕,彭振生,严国清,郭焕银,蔡之让.钙钛矿氧化物La0.3Ca0.7MnO3的磁性质[J].稀有金属,2005(04):513-516. |
| [24] | Gupta R.;Bhat SV.;Sood AK.;Rao CNR.;Joshi JP. .An electron paramagnetic resonance study of Pr0.6Ca0.4MnO3 across the charge-ordering transition[J].Journal of Physics. Condensed Matter,2000(30):6919-6926. |
| [25] | Tian H W;Zheng W U;Zhao Z D et al.Magnetic properties and electron spin resonance of charge ordering manganite Y0.5Ca0.5MnO3[J].Chinese Physics Letters,2005,401(4-6):585. |
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