Kamenev KV, Lees MR, Balakrishnan G, Paul DM, Marshall WG, Tissen VG, Nefedova MV
Department of Physics and Astronomy, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom.
Phys Rev Lett. 2000 Mar 20;84(12):2710-3. doi: 10.1103/PhysRevLett.84.2710.
The effect of pressure of up to 9 GPa on the magnetic and structural properties of layered (La0.6Nd0.4)1.2Sr1.8Mn2O7 manganite has been investigated. Pressure shifts the Mn atoms from the center of each bilayer towards the adjacent bilayer. The observed shift of the Mn atoms involves mainly a charge redistribution within the d(3z(2)-r(2)) axial orbital. The decrease in the interbilayer spacing and the shift of the Mn atoms away from the center of each bilayer result in increased magnetic and electronic coupling between the adjacent bilayers along the c axis.
研究了高达9吉帕的压力对层状（La0.6Nd0.4）1.2Sr1.8Mn2O7锰酸盐的磁性和结构性质的影响。压力使锰原子从每个双层的中心向相邻双层移动。观察到的锰原子移动主要涉及d(3z(2)-r(2))轴向轨道内的电荷重新分布。双层间距的减小以及锰原子从每个双层中心的移动导致沿c轴相邻双层之间的磁耦合和电子耦合增加。
