| Effect of particle size on the structure and magnetic properties of La0.6Pb0.4MnO3 nanoparticles |
| T. Zhang; G. Li; T. Qian; J. F. Qu; X. Q. Xiang; X. G. Li
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| 2006
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| 发表期刊 | Journal of Applied Physics
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| ISSN | 0021-8979
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| 卷号 | 100期号:9 |
| 摘要 | We studied the effect of particle size on the structure and magnetic properties of La0.6Pb0.4MnO3 compounds with particle diameters varying from 5 to 100 nm. With decreasing particle size, the increase of the rhombohedral distortion narrows the bandwidth W-O2p and hence results in the decrease of ferromagnetic transition temperature. At the same time, the magnetic domain structure evolves from multidomain to single domain, and finally a superparamagnetic behavior is detected. The critical single domain size determined by experiment is about 25 nm, and the critical superparamagnetic behavior size obtained by calculation is 5.8 nm. It is found that the variation of coercivity is related to the evolution of magnetic domain states with particle size, and the saturation magnetization decreases significantly due to the increasing contribution of the surface effect with decreasing particle size. (c) 2006 American Institute of Physics. |
| 部门归属 | univ sci & technol china, hefei natl lab phys sci microscale, anhua 230026, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;li, xg (reprint author), univ sci & technol china, hefei natl lab phys sci microscale, anhua 230026, peoples r china;lixg@ustc.edu.cn
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| 关键词 | Optical Phonons
Glassy Behavior
Magnetoresistance
Perovskite
Coercivity
Lamno3
Raman
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| URL | 查看原文
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| WOS记录号 | WOS:000242041500102
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/34707
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
T. Zhang,G. Li,T. Qian,et al. Effect of particle size on the structure and magnetic properties of La0.6Pb0.4MnO3 nanoparticles[J]. Journal of Applied Physics,2006,100(9).
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| APA |
T. Zhang,G. Li,T. Qian,J. F. Qu,X. Q. Xiang,&X. G. Li.(2006).Effect of particle size on the structure and magnetic properties of La0.6Pb0.4MnO3 nanoparticles.Journal of Applied Physics,100(9).
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| MLA |
T. Zhang,et al."Effect of particle size on the structure and magnetic properties of La0.6Pb0.4MnO3 nanoparticles".Journal of Applied Physics 100.9(2006).
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