強磁性La_<2/3>Sr_<1/3>MnO_3セラミックのトンネル型磁気抵抗効果

概要

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La_<2/3>Sr_<1/3>MnO_3 ceramics were prepared with extra La-O and (La, Sr)-O and mineralizers SiO_2 and PbO. The extra La-O and (La, Sr)-O were expected to interpose between the grains and then to weaken their magnetic interaction, which might be effective to make low-field tunneling magnetoresistance. In addition, the mineralizers were expected not only to lower the sintering temperature, but also to interpose between the grains. As a result, the addition of extra La-O and (La, Sr)-O worked in sharpening ρ-B curves, while the SiO_2 and PbO only lowered the sintering temperature. This finding will bring about a useful way to develope low - field tunneling magnetoresistance devices in the future.
東海大学の論文
2001-03-30