期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
The Enhancement of Magnetoresistance in Manganite La0.7Sr0.3MnO3 Doped with Ferrite at Low Temperature
摘要/Abstract
摘要：
采用溶胶凝胶法制备了纳米钙钛矿锰氧化物La0.7Sr0.3MnO3,并同一定量的软磁铁氧体材料制备了复合体.用XRD对复合体系进行了测定,发现在经高温退火后,2种物质仍保持各自结构,两者之间没有发生反应;在200K左右的低温下,体系磁电阻有增强效应.
Abstract：
La0.7Sr0.3MnO3 polycrystalline nanometer powders are prepared by sol-gel method,then doped with soft ferrite.The phase structure and crystal size were presented by X ray diffractometer.The two powders La0.7Sr0.3MnO3 and (Ni,Zn)Fe2O4 keep in their structure and ingredient respectively after being high temperature annealed,and there is no new phase engender.An enhancement of the magnetoresistance response was founded in the region of 180～220K.
关键词
Key words：
magnetoresistance
;
soft magnetic ferrite
;
manganite
;
sol-gel method
;