摘要:
脉冲强磁场具有峰值磁场强及扫场速度快的特点,在一个磁场脉冲内可获得从零场到最高磁场强度的全部数据,因而测量结果具有较高的精确度和对比度.稀土发光材料因具有发光谱线丰富、发光效率高的特点,在照明、显示和传感等领域有着广泛的应用.在强磁场作用下,稀土发光材料展现出发光强度和颜色可调的特征,在磁场传感、磁场标定和磁控发光器件等方面有重要应用价值.文章利用武汉国家脉冲强磁场科学中心磁光测量装置,系统地研究了铒、铕等稀土元素掺杂的发光材料在脉冲强磁场作用下的发光光谱、发光强度以及精细能级结构等特征随磁场变化的规律,初步探索了脉冲强磁场下的磁光谱在晶体结构分析、能级结构确定、磁场标定以及磁场传感等方面的应用.
Abstract:
Due to the high peak intensity and fast sweep rate of pulsed magnetic fields, magneto-optical measurements have the advantages of fast data acquisition, good accuracy and contrast, and low system errors which could arise from environmental fluctuations. Rare earth lumi-nescent materials have broad applications in lighting, display, and sensing, thanks to their rich, strong, and sharp spectral lines in both visible and near infrared wavelength regions. When a high external magnetic field is applied, these materials exhibit behaviors such as PL enhancement, PL suppression, and color change, which make them very useful in magnetic field calibration, and magnetically controlled photonic and optical devices. In this paper, the evolution characteristics of the PL spectra, PL intensity, and fine electronic structures of erbium and europium doped lumines-cent materials under pulsed high magnetic fields are investigated with the magneto-optical facili-ties in Wuhan National High Magnetic Field Center. The applications of pulsed high magnetic fields in various areas, for example, crystal structure exploration, electronic structure characteriza-tion, magnetic field calibration, and magnetic field sensing, are described as well.
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