论文标题
旋转革命
Spin revolution
论文作者
论文摘要
物理的经典定律通常在时间逆转下是不变的。在这里，我们揭示了一类新型的磁力学效应严格破坏时间反向对称性。该效果基于在存在摩擦和外部磁场的情况下硬磁铁围绕其磁化轴的机械旋转，我们称之为旋转革命。时间反转对称性破坏的物理原因是旋转革命，而不是耗散。时间反转对称性破裂会导致各种意外影响，包括对垂直表面的向上推进，以及垂直于施加力的垂直于重力的垂直表面以及磁性陀螺运动。与自旋相反，自旋革命的角动量与平衡磁化强度可以平行或反平行。旋转革命自发出现，没有外部旋转，并在磁性，机器人和能量收集等领域提供了各种应用。
The classical laws of physics are usually invariant under time reversal. Here, we reveal a novel class of magnetomechanical effects rigorously breaking time-reversal symmetry. The effect is based on the mechanical rotation of a hard magnet around its magnetization axis in the presence of friction and an external magnetic field, which we call spin revolution. The physical reason for time-reversal symmetry breaking is the spin revolution and not the dissipation. The time-reversal symmetry breaking leads to a variety of unexpected effects including upward propulsion on vertical surfaces defying gravity as well as magnetic gyroscopic motion that is perpendicular to the applied force. In contrast to the spin, the angular momentum of spin revolution can be parallel or antiparallel to the equilibrium magnetization. The spin revolution emerges spontaneously, without external rotations, and offers various applications in areas such as magnetism, robotics and energy harvesting.
