Abstract
Non-cuprate layered perovskite Sr2RuO4, which is an analogue of (La,Sr)2CuO4, exhibits superconductivity below Tc≈1K. We have synthesized a new system Sr3−xCaxRu2Oy and found the solubility of Ca to be at least as much as x = 2. These samples are not superconductive down to 2K but magnetically ordered. The x dependence of the lattice parameters and that of Tmag clearly indicate that there are at least two distinct structural phases in Sr3−xCaxRu2Oy.
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