Spin thermo-electric phenomena have attracted wide attention recently, e.g., the spin Peltier effect—heat generation by magnonic spin currents. Here, we find that the spin Peltier effect also manifests as a heat wave accompanying fast moving magnetic textures. High speed and extreme magnetic excitation localisation are paramount for efficient transfer of energy from the spin-degrees of freedom to electrons and lattice. While satisfying both conditions is subject to severe restrictions in ferromagnets, we find that domain walls in antiferromagnets can overcome these limitations due to their ultrahigh mobility and ultra-small widths originating from the relativistic contraction. To illustrate our findings, we show that electric current driven domain wall motion in the antiferromagnetic metal Mn₂Au can carry a localised heat wave with temperature up to 1 K. Since domain walls are localised magnetic objects, this effect has the potential for nanoscale heating sensing and functionalities.

自旋热电现象最近引起了广泛的关注，例如自旋珀尔帖效应-由强力自旋电流产生的热量。在这里，我们发现自旋珀尔帖效应也表现为伴随快速移动的磁性纹理的热波。高速和极限磁激发本地化对于将能量从自旋自由度有效转移到电子和晶格至关重要。虽然满足这两个条件都受到铁磁体的严格限制，但我们发现反铁磁体中的畴壁可以克服这些限制，因为它们的超高迁移率和源自相对论性收缩的超小宽度。为了说明我们的发现，我们表明电流驱动反铁磁金属Mn ₂中的畴壁运动Au可以承载温度高达1 K的局部热波。由于畴壁是局部磁性物体，因此这种效应具有用于纳米级热感测和功能的潜力。