Xu, P. and Xia, K. and Yang, H. F. and Li, J. J. and Gu, C. Z. (2007) Domain wall scattering in the nanocontacts of ferromagnetic metals with different coercive forces. NANOTECHNOLOGY, 18 (29).
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Official URL: http://www.iop.org/EJ/abstract/-search=66177444.1/...
The electrical transport properties of nanocontact nanostructures of ferromagnetic metals with different coercive forces have been studied by the I-V measurements at room temperature without applied magnetic field. The result indicates that the nanocontact structure within the critical contact width for NiFe, Fe and Ni can pin a single domain wall at the nanocontact position. A sharp resistance drop will happen when the domain wall is depinned from the contact position by injecting the spin polarized current. Furthermore, we have found that the critical current density for depinning is constant for each ferromagnetic metal. They are 1.8 x 10(7) A cm(-2) for NiFe, 3.2 x 10(7) A cm(-2) for Ni and 3.8 x 10(7) A cm(-2) for Fe, respectively, which increases with the increase of the coercive force of ferromagnetic metal. Micromagnetic simulation results provided a detailed understanding on the magnetic configuration for ferromagnetic metals with different coercive forces.
|Uncontrolled Keywords:||RESISTIVITY - Nanocontact - ferromagnetic metals|
|Subjects:||Physical Science > Nanomagnetics|
|Deposited On:||28 Sep 2009 11:53|
|Last Modified:||28 Sep 2009 11:53|
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