Electron paramagnetic resonance (EPR) spectrum is an effective tool to investigate the optical and magnetic properties of crystals and complexes doped with transition-metal and rare-earth ions.

• 电子顺磁共振(EPR)谱是研究掺过渡和稀土金属离子晶体及络合物的微观结构、光学和磁学性质等的有力工具。