Tuning negative and positive magnetoresistances by variation of   spin-polarized electron transfer into pi-conjugated polymers

doi:10.1063/1.1667264

CORC > 北京大学 > 化学与分子工程学院

	Tuning negative and positive magnetoresistances by variation of spin-polarized electron transfer into pi-conjugated polymers
	Luo, F ; Song, W ; Wang, ZM ; Yan, CH
刊名	应用物理学快报
	2004
关键词	ROOM-TEMPERATURE MAGNETORESISTANCE ENHANCED MAGNETORESISTANCE COMPOSITES POLYPHENYL
DOI	10.1063/1.1667264
英文摘要	A series of polyparaphenyl derivatives with different conductivities have been synthesized to fabricate three kinds of polymer-embedded La0.7Ca0.3MnO3 (LCMO) composites by mixing different weight fractions of polymers and LCMO. X-ray diffraction and Fourier transform infrared spectra show the coexistence of the LCMO particles and polymers and no chemical reactions between each other. By adjusting the conductivity and pi electron polarization of polymers, spin-polarized electron transfer from the surfaces of LCMO magnetic particles through the interfacial coupling into polymers can be tuned, leading to the tunable negative and positive magnetoresistances in these composites. This abnormal positive MR can be mainly attributed to the spin-polarized electron tunneling weakening and magnetic scattering enhancement on polarized pi electrons through the LCMO/polymer interfaces. (C) 2004 American Institute of Physics.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000189384900033&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Physics, Applied; SCI(E); EI; 18; ARTICLE; 10; 1719-1721; 84
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/255409]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Luo, F,Song, W,Wang, ZM,et al. Tuning negative and positive magnetoresistances by variation of spin-polarized electron transfer into pi-conjugated polymers[J]. 应用物理学快报,2004.
APA	Luo, F,Song, W,Wang, ZM,&Yan, CH.(2004).Tuning negative and positive magnetoresistances by variation of spin-polarized electron transfer into pi-conjugated polymers.应用物理学快报.
MLA	Luo, F,et al."Tuning negative and positive magnetoresistances by variation of spin-polarized electron transfer into pi-conjugated polymers".应用物理学快报 (2004).