[8a-Z07-1~8] 6.3 Oxide electronics

△ [8a-Z07-3] Ferromagnetism and magnetotransport properties of Pb doped SrRuO₃ thin films

〇(M1)Lingfei Zhang¹, Takahiro Fujita¹, Masashi Kawasaki^1,2 (1.The Univ. of Tokyo, 2.RIKEN CEMS)

Keywords:oxide thin film, perovskite, ferromagnetism

It is well known that chemical substitution into the A-site of itinerant ferromagnet SrRuO₃ results in a drastic change on its magnetic properties. The ferromagnetic transition temperature has been considered to be strongly correlated with lattice constants and volume. However, previous reports with bulk polycrystalline samples revealed that the scenario was not that simple. When the dopant is Ba²⁺, whose ion radius is larger than Sr²⁺, the system sustains ferromagnetism regardless of the doping level. On the other hand, in case of Pb²⁺, it was reported that the ferromagnetism vanished when doping level was around 60% although its ion radius is between those of Sr²⁺ and Ba²⁺. In this research, we fabricate Pb doped SrRuO₃ single crystalline thin films and evaluate the evolution of ferromagnetism and magnetotransport properties in accordance with the doping level.