CAJ | 학술논문

利用低温高压电阻原位测量装置(自箝铍青铜活塞-圆筒式压砧),在0～1.05GPa静水压力范围内,对以层状钙钛矿结构为主相、名义成分为La 1.0Ca 2.0Mn2O7的锰氧化物样品进行了压阻效应研究.实验观测到异常的压阻效应.在低温5～150K范围内,压力为 0.55GPa时,样品呈现出高达40%的压阻效应,而且,金属-绝缘体相变温度在低压范围内随压力的增加而增加,但随着压力的进一步增加而减小.
이용저온고압전조원위측량장치(자겸피청동활새-원통식압침),재0～1.05GPa정수압력범위내,대이층상개태광결구위주상、명의성분위La 1.0Ca 2.0Mn2O7적맹양화물양품진행료압조효응연구.실험관측도이상적압조효응.재저온5～150K범위내,압력위 0.55GPa시,양품정현출고체40%적압조효응,이차,금속-절연체상변온도재저압범위내수압력적증가이증가,단수착압력적진일보증가이감소.
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.