稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2003年
5期
548-551
,共4页
盛晓波%童林夙%林萍华%杨石强%储成林%翟亚
盛曉波%童林夙%林萍華%楊石彊%儲成林%翟亞
성효파%동림숙%림평화%양석강%저성림%적아
metal materials%colossal magnetoresistance%low-field magnetoresistance%perovskite manganites%ceramics%rare earths
Porous ceramic samples of Y doped perovskite manganites were prepared. In these samples, the transition from high temperature paramagnetic insulator to low temperature ferromagnetic metal as well as the low field magnetoresistance (LFMR) effect at the low temperature is similar to that in dense samples. Opposite to that in dense samples, LFMR effect in porous sample is observed at the high temperature close to the peak of MR-T curves. The results suggest that the high temperature LFMR effect and the applicable colossal magnetoresistance (CMR) materials could be obtained by controlling the microstructures of this class of perovskite manganites.
