论文标题
通过拉曼光谱研究
Magnetic characteristics of epitaxial NiO films studied by Raman spectroscopy
论文作者
论文摘要
拉曼光谱法用于研究由MGO（100）底物上血浆辅助分子束外延生长的异急症Nio薄膜的磁性特性。为了确定néel温度，我们通过分析拉曼峰的温度依赖性来证明一种可靠的方法，该温度依赖于元素的二阶散射。发现抗磁耦合强度受到生长条件的强烈影响。表现出低温镁频率和Néel温度取决于双轴晶格菌株以及由点缺陷主导的结构障碍程度。
Raman spectroscopy is utilized to study the magnetic characteristics of heteroepitaxial NiO thin films grown by plasma-assisted molecular beam epitaxy on MgO(100) substrates. For the determination of the Néel temperature, we demonstrate a reliable approach by analyzing the temperature dependence of the Raman peak originating from second-order scattering by magnons. The antiferromagnetic coupling strength is found to be strongly influenced by the growth conditions. The low-temperature magnon frequency and the Néel temperature are demonstrated to depend on the biaxial lattice strain and the degree of structural disorder which is dominated by point defects.
