光电效应测定普朗克常量实验的计算机仿真的教学探讨

计算机仿真实验是近年来在计算机教学中开辟的新领域,在实验教学中发挥了积极的作用。本文介绍了"光电效应测定普朗克常量实验的计算机仿真"的实验过程以及实验教学中需注意的难点。     

A New Empirical Model for Estimation of sp^3 Fraction in Diamond-Like Carbon Films

A new empirical model to estimate the content of sp^3 in diamond-like carbon （DLC） films is presented, based on the conventional Raman spectra excited by 488nm or 514nm visible light for different carbons. It is found that bandwidth of the G peak is related to the sp^3 fraction. A wider bandwidth of the G peak shows a higher sp^3 fraction in DLC films.     

惠斯通电桥测电阻及电阻温度系数的教学探讨

"惠斯通电桥测电阻及电阻温度系数"实验是大学物理实验中一项重要的研究性实验,介绍"惠斯通电桥测电阻及电阻温度系数"的基本原理及实验过程,针对实验教学中经常出现的问题,提出了一些从教学实践中总结出来的解决方法。     

Local structure of oxygen-deficient Yttrium oxide

Yttrium oxide thin films have been deposited on Si (100) substrate by using pulsed laser deposition (PLD) method. X-ray diffraction (XRD), hard and soft X-ray absorption spectroscopy (XAFS) are employed to investigate the origin of oxygen vacancies and their influence on the structure and atomic distributions. The XRD results indicate that the Y₂O₃ thin films strongly orient the (111) axis of the cubic structure. Analyses on the Y K-edge extended X-ray absorption fine structures reveal that the coordination number of Y atoms decreases and the bond length of Y-O contracts due to the loss of oxygen atoms. The X-ray absorption near edge structure analysis together with a theoretical approach further confirms the oxygen vacancies formation and their possible location.