Magnetoresistance, micromagnetism, and domain-wall scattering in epitaxial hcp Co films

U. Rödiger; J. Yu; L. Thomas; S. S.P. Parkin; A. D. Kent

doi:10.1103/PhysRevB.59.11914

Magnetoresistance, micromagnetism, and domain-wall scattering in epitaxial hcp Co films

U. Rödiger, J. Yu, L. Thomas, S. S.P. Parkin, A. D. Kent

Research output: Contribution to journal › Article › peer-review

Abstract

Large negative magnetoresistance (MR) observed in transport measurements of hcp Co films with stripe domains were recently reported and interpreted in terms of domain-wall (DW) scattering mechanism. Here detailed MR measurements, magnetic force microscopy, and micromagnetic calculations are combined to elucidate the origin of MR in this material. The large negative room-temperature MR reported previously is shown to be due to ferromagnetic resistivity anisotropy. Measurements of the resistivity for currents parallel (CIW) and perpendicular to DW’s (CPW) have been conducted as a function of temperature. Low-temperature results show that any intrinsic effect of DW’s scattering on MR of this material is very small compared to the anisotropic MR.

Original language	English (US)
Pages (from-to)	11914-11918
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	59
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.59.11914
State	Published - 1999

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Magnetoresistance, micromagnetism, and domain-wall scattering in epitaxial hcp Co films",

abstract = "Large negative magnetoresistance (MR) observed in transport measurements of hcp Co films with stripe domains were recently reported and interpreted in terms of domain-wall (DW) scattering mechanism. Here detailed MR measurements, magnetic force microscopy, and micromagnetic calculations are combined to elucidate the origin of MR in this material. The large negative room-temperature MR reported previously is shown to be due to ferromagnetic resistivity anisotropy. Measurements of the resistivity for currents parallel (CIW) and perpendicular to DW{\textquoteright}s (CPW) have been conducted as a function of temperature. Low-temperature results show that any intrinsic effect of DW{\textquoteright}s scattering on MR of this material is very small compared to the anisotropic MR.",

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AU - Rödiger, U.

AU - Yu, J.

AU - Thomas, L.

AU - Parkin, S. S.P.

AU - Kent, A. D.

PY - 1999

Y1 - 1999

N2 - Large negative magnetoresistance (MR) observed in transport measurements of hcp Co films with stripe domains were recently reported and interpreted in terms of domain-wall (DW) scattering mechanism. Here detailed MR measurements, magnetic force microscopy, and micromagnetic calculations are combined to elucidate the origin of MR in this material. The large negative room-temperature MR reported previously is shown to be due to ferromagnetic resistivity anisotropy. Measurements of the resistivity for currents parallel (CIW) and perpendicular to DW’s (CPW) have been conducted as a function of temperature. Low-temperature results show that any intrinsic effect of DW’s scattering on MR of this material is very small compared to the anisotropic MR.

AB - Large negative magnetoresistance (MR) observed in transport measurements of hcp Co films with stripe domains were recently reported and interpreted in terms of domain-wall (DW) scattering mechanism. Here detailed MR measurements, magnetic force microscopy, and micromagnetic calculations are combined to elucidate the origin of MR in this material. The large negative room-temperature MR reported previously is shown to be due to ferromagnetic resistivity anisotropy. Measurements of the resistivity for currents parallel (CIW) and perpendicular to DW’s (CPW) have been conducted as a function of temperature. Low-temperature results show that any intrinsic effect of DW’s scattering on MR of this material is very small compared to the anisotropic MR.

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Magnetoresistance, micromagnetism, and domain-wall scattering in epitaxial hcp Co films

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