标题： 关于自旋自由电子气双交换相互作用导致的一维铁磁畴壁变形的注记 显示英文标题

标题： A note on the deformation of 1D ferromagnetic domain walls due to double exchange interaction with a free electron gas

摘要： 利用S矩阵形式化方法，我们评估了布洛赫或奈尔磁畴壁与一维自由电子气通过双交换相互作用相互作用时的热力学势和电导。 弹性磁能加电子热力学势的最小化表明，对于化学势大于磁相互作用的情况，磁畴壁通常变形为薄壁；而对于磁相互作用大于化学势的情况，则趋向于宽壁。 相比之下，对于双壁结构，变形总是趋向于宽壁。 对于单个以及双磁壁结构，随着壁宽减小，电导单调下降。 在此原型模型中，布洛赫和奈尔磁畴壁的热力学势和电导相同。 显示英文摘要

摘要： Using an S-matrix formulation we evaluate the thermodynamic potential and conductance of a Bloch or N\'eel magnetic wall interacting with a one dimensional free electron gas via a double exchange interaction. The minimization of the elastic magnetic energy plus electronic thermodynamic potential indicates that for chemical potential larger than the magnetic interaction the domain wall is generally deformed to a thin wall, while for magnetic interaction larger than the chemical potential tends towards wide walls. In contrast, for a double wall configuration the deformation is always towards wide walls. For the single as well as the double magnetic wall configurations the conductance monotonically decreases with decreasing wall width. The thermodynamic potential and conductance of Bloch and N\'eel magnetic domain walls are identical within this prototype model.