イオン交換法により作製した層状ペロブスカイト型ニオブ酸塩，KCa₂Nb₃O₁₀，における超伝導の可能性

抄録

We prepared low temperature phase of triple layered perovksite KCa₂Nb₃O₁₀ by an ion-exchange reaction. Li-intercalated low temperature phase, Li_0.79KCa₂Nb₃O₁₀, shows strong diamagnetic signal around at 7.8 K. The magnetic phase transition temperature of Li-intercalated low temperature phase is higher than that of Li-intercalated high temperature phase.