材料科学与工程学报2012，Vol.30Issue(3)：468-472,5.
La_（0.60）Sr_（0.40-x）K_xMnO_3系列材料的磁电阻效应
Magnetoresistance of La0.60Sr0.40-xKxMnO3
摘要
Abstract
Polycrystalline perovskite rare-earth manganites La0.60Sr0.40-xKxMnO3（x=0.00,0.15,0.20,0.30） were synthesized by sol-gel method.It is found that when Sr2＋ ions are partly substituted by K＋ ions,the Curie temperature of substituted samples can decrease to room temperature and the room temperature magnetoresistance（MR） increases obviously comparing with un-substituted La0.60Sr0.40MnO3.Under an applied filed of 1.8T,there is a maximum MR with 21% at 304 K for the sample La0.60Sr0.1K0.3MnO3.However,under the same applied field,there is only a maximum MR with 6.4% at 373 K for the un-substituted sample La0.60Sr0.40MnO3.Therefore,K＋ ion substitution can remarkably improve the MR of this kind of material.关键词
钙钛矿锰氧化物/磁电阻/溶胶-凝胶法Key words
perovskite manganite/magnetoresistance/sol-gel method分类
数理科学引用本文复制引用
赵福伟,唐贵德..La_（0.60）Sr_（0.40-x）K_xMnO_3系列材料的磁电阻效应[J].材料科学与工程学报,2012,30(3):468-472,5.基金项目
河北省自然科学基金资助项目 （）
河北省基础研究重点资助项目 （）
