Self-stabilizing exchange-mediated spin transport

Article

关键词: BOSE-EINSTEIN CONDENSATION;    ROOM-TEMPERATURE;    MAGNONS;   

DOI  :  10.1103/PhysRevB.103.144412

来源: SCIE

【 摘 要 】

Long-range spin transport in magnetic systems can be achieved by means of exchange-mediated spin textures with robust topological winding, a phenomenon referred to as spin superfluidity. Its experimental signatures have been discussed in antiferromagnets, which are nearly free of dipolar interaction. However, in ferromagnets, which possess non-negligible dipole fields, realization of such spin transport has remained a challenge. Using micromagnetic simulations, we investigate coherent exchange-mediated spin transport in extended thin ferromagnetic films. We uncover a two-fluid state in which the long-range spin transport by spin textures coexists with spin waves, as well as a soliton-screened spin transport regime at high spin injection biases. Both states are associated with distinct spin texture reconstructions near the spin injection region and sustain spin transport over large distances.

【 授权许可】

Free