尖晶石型 SrCoO2.5 的拓扑相转变为钙钛矿型 SrCoO3-δ。
Topotactic phase transformation of the brownmillerite SrCoO2.5 to the perovskite SrCoO3- δ.
机构信息
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
出版信息
Adv Mater. 2013 Jul 19;25(27):3651-6. doi: 10.1002/adma.201300531.
PMID:23852832
Abstract
Pulsed laser epitaxy of brownmillerite SrCoO2.5 thin films and their phase transformation to the perovskite SrCoO3-δ are investigated. While the direct growth of the fully oxidized perovskite films is found to be an arduous task, filling some of oxygen vacancies into SrCoO2.5 by topotactic oxidation accompanies systematic evolution of electronic, magnetic, and thermoelectric properties, useful for many information and energy technologies.
摘要
采用脉冲激光外延法制备了褐锰矿 SrCoO2.5 薄膜，并研究了其向钙钛矿 SrCoO3-δ 的相转变。虽然直接生长完全氧化的钙钛矿薄膜是一项艰巨的任务，但通过拓扑氧化填充 SrCoO2.5 中的部分氧空位，伴随着电子、磁性和热电性能的系统演变，这对许多信息和能源技术都很有用。
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