Quantum coherence in a ferromagnetic metal: Time-dependent conductance fluctuations | |
Article | |
关键词: DOMAIN-WALL; 1/F NOISE; ANISOTROPIC MAGNETORESISTANCE; WEAK-LOCALIZATION; LOW-TEMPERATURE; MAGNETIC-FIELD; THIN-FILMS; CONDUCTIVITY; INTERFERENCE; PARTICLES; | |
DOI : 10.1103/PhysRevB.70.212407 | |
来源: SCIE |
【 摘 要 】
Quantum coherence of electrons in ferromagnetic metals is difficult to assess experimentally. We report measurements of time-dependent universal conductance fluctuations in ferromagnetic metal (Ni0.8Fe0.2) nanostructures as a function of temperature and magnetic field strength and orientation. We find that the Cooperon contribution to this quantum correction is suppressed, and that domain wall motion can be a source of coherence-enhanced conductance fluctuations. The fluctuations are more strongly temperature dependent than those in normal metals, hinting that an unusual dephasing mechanism may be at work.
【 授权许可】
Free