作者: Changjin Zhang , Langsheng Ling , Wei Tong , Wei Ling , Guolin Feng
DOI: 10.1063/1.3556915
关键词:
摘要: The magnetic states of the BaFe2-xCoxAs2 single crystal samples have been studied by magnetization and electron spin resonance measurements. We find a transformation Fe2+ state from high temperature high-spin to low low-spin state, indicating small field splitting energy. In superconducting samples, both results suggest an itinerant behavior system.