磁场诱导LaCoO3自旋跃迁的级联
A cascade of magnetic field induced spin transitions in LaCoO3
摘要：
研究了绝缘钙钛矿LaCoO 3在近100 T磁场下的磁化强度和磁致伸缩特性。与单离子模型的预期形成鲜明对比，数据显示两个不同的一阶自旋跃迁和明确的磁化平台。在较高的平台的磁化强度只有大约一半的自旋-1钴离子的饱和值预期。这些研究结果强烈建议集体行为诱导不同的电子之间的强相互作用-因此自旋-配置的钴3+离子。我们提出了一个模型，这些相互作用，预测晶体自旋纹理和级联的四个磁相变在高场，其中前两个占实验数据。
英文摘要：
We present magnetization and magnetostriction studies of the insulating perovskite LaCoO3 in magnetic fields approaching 100 T. In marked contrast with expectations from single-ion models, the data reveal two distinct first-order spin transitions and well-defined magnetization plateaux. The magnetization at the higher plateau is only about half the saturation value expected for spin-1 Co3+ ions. These findings strongly suggest collective behavior induced by strong interactions between different electronic -- and therefore spin -- configurations of Co3+ ions. We propose a model of these interactions that predicts crystalline spin textures and a cascade of four magnetic phase transitions at high fields, of which the first two account for the experimental data.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
