外磁场诱导下的硫化钴晶相转变

Magnetic Field Induced Phase Transition of Crystalline Cobalt Sulfides

利用磁场诱导生长技术,成功地控制了Co9S8晶体向Co3S4晶体的晶相过渡生长.通过对晶体产物的XRD,SEM和TEM分析,证实了这种磁场诱导下的晶相结构转变.研究结果表明,通过设计在完全相同的化学反应条件下施加不同磁场,证明外磁场是该晶相相变的惟一诱导因素.并对诱导相变的机理进行了解释.该成果有望为过渡金属硫化物的低温生长提供新技术.

Applied magnetic-field was proved to be an effective approach for inducing crystal phase transition from Co9S8 to Co3S4.XRD,SEM and TEM were employed to identify the crystal phase transitions between the samples as-prepared.The growth and magnetic-field-induced mechanism was proposed and validated by synthesizing cobalt sulfide under an identical chemical reaction condition except for the intensity of applied magnetic field.This technique is hopeful for realizing crystal phase transformation at a lower temperature in the transition-metal sulfide system.