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】

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