Spin noise and damping in individual metallic ferromagnetic nanoparticles

Article

关键词: MAGNETIZATION REVERSAL;    ELECTRONIC STATES;    SINGLE;    ANISOTROPY;    TRANSPORT;   

DOI  :  10.1103/PhysRevB.96.241402

来源: SCIE

【 摘 要 】

We introduce a highly sensitive and relatively simple technique to observe magnetization motion in single Ni nanoparticles, based on charge sensing by electron tunneling at millidegrees Kelvin temperature. Sequential electron tunneling via the nanoparticle drives nonequilibrium magnetization dynamics, which induces an effective charge noise that we measure in real time. In the free spin diffusion regime, where the electrons and magnetization are in detailed balance, we observe that magnetic damping time exhibits a peak with the magnetic field, with a record long damping time of similar or equal to 10 ms.

【 授权许可】

Free