%0 Journal Article
%T Rotation of ferromagnetic clusters induced magnetoresistance in the junction composed of La0.9Ca0.1MnO3 +δ and 1 wt.% Nb-doped SrTiO3
%A 谢燕武
%A 王登京
%A 沈保根
%A 孙继荣
%J 中国物理 B
%D 2007
%I 
%X A junction composed of ultrathin La0.9Ca0.1MnO3＋δ （LCMO） film and 1 wt.% Nb-doped SrTiO3 was fabricated and its magnetoresistance （MR） was studied and compared with LCMO film. It was found that the resistance of the junction has a similar dependence on magnetic field as that of the LCMO film： the curvature of R-H curves is upward above Curie temperature （Tc） and downward below TC. These behaviours strongly suggest that the rotation of ferromagnetic clusters in manganite also causes MR in the corresponding junction. This MR can be qualitatively understood by the change of the width of the barrier induced by the rotation of ferromagnetic clusters. These results suggest a possibility to obtain junctions with large low-field MR.
%K 磁致电阻
%K 水锰矿
%K 铁磁体
%K 自旋
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=51EC29F0F1FE4796EB485ABB509A0792&yid=A732AF04DDA03BB3&vid=7801E6FC5AE9020C&iid=F3090AE9B60B7ED1&sid=188F872C89A1B825&eid=D3A1CFE94F348BC6&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=17