高压物理学报2006，Vol.20Issue(3)：230-236,7.
名义成分为La1.0Ca2.0Mn2O7锰氧化物的压阻效应
Pressure Effect on Electrical Properties of a Manganate with Nominal Composition La1.0Ca2.0Mn2O7
摘要
Abstract
Pressure effects on electrical properties of a manganate with nominal composition La1.0Ca2.0Mn2O7,which has a layered perovskite structure as majority phase,have been investigated under hydrostatic pressures up to 1.05GPa by using a self-clamped CuBe piston-cylinder cell.An abnormal pressure effect was observed.At a pressure of 0.55GPa,a large pressure resistance effect of ≈40% was observed in a lower temperature range of 5～150K.Besides,it is found that the metal-insulator transition temperature increases at low pressure but deceases with further loading pressure.关键词
层状钙钛矿结构锰氧化物/电阻率/压阻效应Key words
layered perovskite manganate/electrical resistivity/pressure resistance effect分类
数理科学引用本文复制引用
朱嘉林,刘振兴,禹日成,李凤英,靳常青..名义成分为La1.0Ca2.0Mn2O7锰氧化物的压阻效应[J].高压物理学报,2006,20(3):230-236,7.基金项目
National Natural Science Foundation of China (10274099 （）
50321101 （）
50332020) （）
State Key Development Program for Basic Research of China (2002CB613301). （2002CB613301）
