Fabrication of polycrystalline La-0.67(Sr1-xCdx)(0.33)MnO3 thin films on Si(100) substrates by sol-gel process

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	Fabrication of polycrystalline La-0.67(Sr1-xCdx)(0.33)MnO3 thin films on Si(100) substrates by sol-gel process
	Z. L. Liu; J. Zhang; K. L. Yao; H. R. Liu; L. H. Jia; H. G. Cheng
	2007
发表期刊	Journal of Sol-Gel Science and Technology
ISSN	0928-0707
卷号	43 期号:1 页码:93-97
摘要	Polycrystalline La-0.67 (Sr1-x Cd (x) )(0.33)MnO3 (LSCMO x = 0, 1/8, 2/8, 3/8, 4/8) films were fabricated on Si(100) single crystal substrates by the sol-gel and the rapid annealing process. According to the field-emission scan electron microscopy (FE-SEM) observation and X-ray (XRD) diffraction studies, all the samples are single phase. We also prepared a series of samples by fixing the ratio of La at 0.67. It is shown that with increase of the doping amount x in La-0.67(Sr1-x Cd (x) )(0.33)MnO3, the average A-site cation radius < A > decreases, the temperature of metal-insulator transition (T-MI) decreases monotonically, rho and magnetoresistance (MR) values increase dramatically, which can be explained by the lattice effects. The enhanced MR effect at low temperature for the LSCMO film is attributed to the suppression of the spin dependent scattering of polarized electrons at the grain boundaries. The low-field magnetoresistance values under 0.3 T are observed to be 2.48% (x = 0) at 300 K and 37.5% (x = 4/8) at 85 K, respectively.
部门归属	huazhong univ sci & technol, inst mat phys, dept phys, wuhan 430074, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;zhang, j (reprint author), huazhong univ sci & technol, inst mat phys, dept phys, wuhan 430074, peoples r china;zlliu@mail.hust.edu.cn greatzhangjian@gmail.com klyao@mail.hust.edu.cn
关键词	Sol-gel Polycrystalline Low-field Magnetoresistance Grain Boundaries Transport-properties Electrical-properties Magnetoresistance Perovskites Growth Oxide Size Mn La
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WOS记录号	WOS:000247194300014
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33726
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. L. Liu,J. Zhang,K. L. Yao,et al. Fabrication of polycrystalline La-0.67(Sr1-xCdx)(0.33)MnO3 thin films on Si(100) substrates by sol-gel process[J]. Journal of Sol-Gel Science and Technology,2007,43(1):93-97.
APA	Z. L. Liu,J. Zhang,K. L. Yao,H. R. Liu,L. H. Jia,&H. G. Cheng.(2007).Fabrication of polycrystalline La-0.67(Sr1-xCdx)(0.33)MnO3 thin films on Si(100) substrates by sol-gel process.Journal of Sol-Gel Science and Technology,43(1),93-97.
MLA	Z. L. Liu,et al."Fabrication of polycrystalline La-0.67(Sr1-xCdx)(0.33)MnO3 thin films on Si(100) substrates by sol-gel process".Journal of Sol-Gel Science and Technology 43.1(2007):93-97.