论文标题
范·弗莱克（Van Vleck）磁磁性和稀土正叉齿中磁场有效力矩的增强euvo4
Van Vleck paramagnetism and enhancement of effective moment with magnetic field in rare earth orthovanadate EuVO4
论文作者
论文摘要
假设4f^6系统具有非磁（J = 0）基态。但是，所有此类系统都清楚地表明存在非零的有效力矩。在这种情况下，尽管具有J = 0的基态，但具有非零的磁矩。我们的研究揭示了该化合物中的三个不同区域，其界限与易感性数据划分。高温易感性表现出对四方晶体引起的温度的线性依赖性，其次是温度独立的高原区域，归因于范·弗莱克（Van Vleck）磁磁性。在低温下，观察到居里 - 韦斯的行为，这是由于磁性EU2+矩而产生的，并导致非零的有效力矩。我们的分析表明，j = 0和j = 1之间的分离（λ）在增加外部磁场时会降低，从而导致在较高场上增强的有效力矩。
The 4f^6 systems were hypothesized to possess non-magnetic (J = 0) ground state. However, all such systems have distinctly shown the presence of non-zero effective moment. In this context, a rare earth orthovanadate EuVO4, which in spite of having J = 0 ground state, possess non-zero magnetic moment. Our studies reveal three different regions in this compound, boundaries of which are demarcated from susceptibility data. The high temperature susceptibility exhibits linear dependence on temperature which arises due to tetragonal crystal field, followed by a temperature independent plateau like region, ascribed to Van Vleck paramagnetism. At low temperatures, Curie-Weiss like behaviour is observed, which arise due to magnetic Eu2+ moments and results in non-zero effective moment. Our analysis reveals that the separation (λ) between the J = 0 and J = 1 states decreases on increasing the external magnetic field which leads to an enhanced effective moment at higher fields.
