Abstract
Quantum coherence of electrons in ferromagnetic metals is difficult to assess experimentally. We report measurements of time-dependent universal conductance fluctuations in ferromagnetic metal 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.
- Received 31 March 2004
DOI:https://doi.org/10.1103/PhysRevB.70.212407
©2004 American Physical Society