论文标题
热梯度中的抗铁磁域壁的磁场控制
Magnetic field control of antiferromagnetic domain walls in a thermal gradient
论文作者
论文摘要
发现热梯度中的抗铁磁域壁在沿易于轴沿均匀磁场应用后，向较冷区域施加了力。这种力随应用场的强度而增加，并且对于足够高的值，它克服了熵力，将壁推向更热的区域。该力与热梯度成正比，并显示出线性依赖性，该磁力壁的净磁矩是由磁场引起的。这种力的起源在于由于田间引起的抗铁磁秩序的相当大的突破，域壁反射率的增加，这将其变成了镁的有效屏障，当它们在其上反射时，它们将线性动量转移到域壁上
An antiferromagnetic domain wall in a thermal gradient is found to experience a force towards colder regions upon the application of a uniform magnetic field along the easy axis. This force increases with the strength of the applied field and, for sufficiently high values, it overcomes the entropic force the that pushes wall towards the hotter regions. The force is proportional to the thermal gradient and it shows a linear dependence with the net magnetic moment of the domain wall induced by the field. The origin of this force lies on the increase of the domain wall reflectivity due the field-induced sizable break of antiferromagnetic order inside it, which turns it into an efficient barrier for magnons, which transfer linear momentum to the domain wall when they are reflected on it
