河北师范大学学报(自然科学版)
河北師範大學學報(自然科學版)
하북사범대학학보(자연과학판)
JOURNAL OF HEBEI NORMAL UNIVERSITY(NATURAL SCIENCE)
2012年
1期
49-53
,共5页
钙铁矿锰氧化物%磁电阻%溶胶-凝胶法
鈣鐵礦錳氧化物%磁電阻%溶膠-凝膠法
개철광맹양화물%자전조%용효-응효법
利用溶胶-凝胶法制备了La0.60Sr0.20K0.20 - yyMnO3(y=0,0.03,0.05,0.07)的类钙钛矿型稀土锰氧化物多晶样品.研究发现,引入离子空位后,样品CMR的温度稳定性得到改善.在1.8T的磁场下,样品y=0.03,0.05,T=220~320 K时,其CMR值保持在4.7%(±0.2%)左右,温度稳定性较好.
利用溶膠-凝膠法製備瞭La0.60Sr0.20K0.20 - yyMnO3(y=0,0.03,0.05,0.07)的類鈣鈦礦型稀土錳氧化物多晶樣品.研究髮現,引入離子空位後,樣品CMR的溫度穩定性得到改善.在1.8T的磁場下,樣品y=0.03,0.05,T=220~320 K時,其CMR值保持在4.7%(±0.2%)左右,溫度穩定性較好.
이용용효-응효법제비료La0.60Sr0.20K0.20 - yyMnO3(y=0,0.03,0.05,0.07)적류개태광형희토맹양화물다정양품.연구발현,인입리자공위후,양품CMR적온도은정성득도개선.재1.8T적자장하,양품y=0.03,0.05,T=220~320 K시,기CMR치보지재4.7%(±0.2%)좌우,온도은정성교호.