Search for itinerant helimagnet showing anomalous magnetotransport properties by high pressure synthesis

点击翻译按钮获取中文摘要

A cubic perovskite SrFeO3 has been known for long as a rare oxide showing metallic conductivity and helimagnetic ordering, which can be a potential system hosting a topologically new phase such as a skyrmion lattice phase. In this study, we have for the first time succeeded in growing large single crystals of SrFeO3 and the related compounds by combining floating zone method and a high pressure technique. Based on the magnetic, resistivity, and Hall resistivity measurements, we have established the magnetic phase diagram containing a rich variety of novel helimagnetic phases. To study these phases in detail, we have performed polarized neutron diffraction measurements under magnetic field, and revealed that this is the novel multiple-Q helimagnetic system, whose propagation vectors are along the <111> equivalents.