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为充分发挥近代物理实验培养学生创新实践能力作用,在传统偏向验证性实验基础上融入创新设计元素,将科研和教学实验有机融合,既能切实培养学生自主创新思维能力及实践能力,又能保留传统实验教学效果,既面向本科教学,更面向未来学生职业发展。以磁控溅射制备金属元素掺杂碲化铋基热电材料为例阐述创新型设计性实验模式,将真空镀膜、热电性能与X射线衍射实验三大重要近代物理实验项目结合起来,重点培养学生自主学习、自主设计、自主创新能力,以适应未来社会和国家发展需要。 相似文献
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A new long-lasting phosphorescence (LLP) phosphor, Sr2SnO4:Sm3+ which emits reddish-orange LLP upon UV-excitation, is prepared by a conventional high-temperature solid-state method. After irradiation under 247-nm UV light, Sr2SnO4:Sm3+ emits an intense reddish-orange emission afterglow from the 4G5/2 to 6HJ (J = 5/2,7/2,9/2) transitions. The afterglow decay curve of the Sm3+-doped Sr2SnO4 phosphor contains a fast decay component and another slow decay one. Due to the presence of the slow decay component, the afterglow can be seen with the naked eye in the dark clearly for more than 1 h after removal of the excitation source. 相似文献
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对Origin软件在"多普勒效应"与"弗兰克-赫兹"实验数据处理中的运用进行了分析比较,有助于发挥其在近代物理实验课程中的促进作用。 相似文献
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采用磁控溅射后退火的方式成功制备了硒化银薄膜,膜厚约为310 nm.X射线粉末衍射分析表明所制备薄膜为单相正交结构,伴随择优取向;比较不同退火温度的效果后发现300℃退火后的薄膜样品结晶最好.扫描电子显微镜、X射线能谱分析表明300℃退火后样品均匀致密,元素组分接近原始比例,是较为适宜的退火温度.低温磁电阻测试显示薄膜样品具有明显的正磁电阻效应,90K附近达到最大磁电阻值7.3;.霍尔系数测量得到薄膜样品室温载流子浓度与霍尔迁移率分别为2.2×1019 cm-3与221 cm2·V-1·s-1. 相似文献
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The resistivity and magnetization for the CuIr2(S1-xTex)4 (0≤x≤ 0.10) system are investigated. Compared with the Se doping, the substitution of Te for S leads to stronger suppression on the metal-insulator transition. Vacancies and imperfections in the sample lattice are found to modify the magnetization, which can be qualitatively understood to consist of the Pauli paramagnetism, Landau diamagnetism, Larmor diamagnetism and Curie magnetism contributions. 相似文献