Transversal magneto-resistance in epitaxial Fe 3O 4 and Fe 3O 4/NiO exchange biased system

Han Chun Wu; R. Ramos; R. G.S. Sofin; Zhi Min Liao; M. Abid; I. V. Shvets

doi:10.1063/1.4739951

Transversal magneto-resistance in epitaxial Fe ₃O ₄ and Fe ₃O ₄/NiO exchange biased system

Han Chun Wu^*, R. Ramos, R. G.S. Sofin, Zhi Min Liao, M. Abid, I. V. Shvets

^*Corresponding author for this work

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

19 Citations (Scopus)

Abstract

We have investigated transversal magneto-resistance (MR) in epitaxial Fe ₃O ₄ and Fe ₃O ₄/NiO exchange biased systems. It was found that the magnetic field dependence and the magnitude of the transversal MR in both systems strongly depend on the bias current density which suggests that the transversal MR in metal oxide with anti-phase boundaries (APBs) cannot be described by the conventional transversal MR for a single magnetic domain. The effect of electron scattering at the APBs may have to be considered. Angular dependence of the transversal MR at low temperature further indicates that the current explanation of the origin of transversal MR on the basis of anisotropic MR alone may not be sufficient for a system experiencing charge ordering.

Original language	English
Article number	052402
Journal	Applied Physics Letters
Volume	101
Issue number	5
DOIs	https://doi.org/10.1063/1.4739951
Publication status	Published - Jul 30 2012
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Transversal magneto-resistance in epitaxial Fe 3O 4 and Fe 3O 4/NiO exchange biased system",

abstract = "We have investigated transversal magneto-resistance (MR) in epitaxial Fe 3O 4 and Fe 3O 4/NiO exchange biased systems. It was found that the magnetic field dependence and the magnitude of the transversal MR in both systems strongly depend on the bias current density which suggests that the transversal MR in metal oxide with anti-phase boundaries (APBs) cannot be described by the conventional transversal MR for a single magnetic domain. The effect of electron scattering at the APBs may have to be considered. Angular dependence of the transversal MR at low temperature further indicates that the current explanation of the origin of transversal MR on the basis of anisotropic MR alone may not be sufficient for a system experiencing charge ordering.",

author = "Wu, {Han Chun} and R. Ramos and Sofin, {R. G.S.} and Liao, {Zhi Min} and M. Abid and Shvets, {I. V.}",

note = "Funding Information: This work was supported by the Science Foundation of Ireland (SFI) under Contract No. 06/IN.1/I91, 08/ERA/I1760. H.C.W. is grateful to the SFI Short Term Travel fellowship support during his stay at PKU and thanks Professor O. N. Mryasov at MINT for useful discussion.",

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AU - Wu, Han Chun

AU - Ramos, R.

AU - Sofin, R. G.S.

AU - Liao, Zhi Min

AU - Abid, M.

AU - Shvets, I. V.

N1 - Funding Information: This work was supported by the Science Foundation of Ireland (SFI) under Contract No. 06/IN.1/I91, 08/ERA/I1760. H.C.W. is grateful to the SFI Short Term Travel fellowship support during his stay at PKU and thanks Professor O. N. Mryasov at MINT for useful discussion.

PY - 2012/7/30

Y1 - 2012/7/30

N2 - We have investigated transversal magneto-resistance (MR) in epitaxial Fe 3O 4 and Fe 3O 4/NiO exchange biased systems. It was found that the magnetic field dependence and the magnitude of the transversal MR in both systems strongly depend on the bias current density which suggests that the transversal MR in metal oxide with anti-phase boundaries (APBs) cannot be described by the conventional transversal MR for a single magnetic domain. The effect of electron scattering at the APBs may have to be considered. Angular dependence of the transversal MR at low temperature further indicates that the current explanation of the origin of transversal MR on the basis of anisotropic MR alone may not be sufficient for a system experiencing charge ordering.

AB - We have investigated transversal magneto-resistance (MR) in epitaxial Fe 3O 4 and Fe 3O 4/NiO exchange biased systems. It was found that the magnetic field dependence and the magnitude of the transversal MR in both systems strongly depend on the bias current density which suggests that the transversal MR in metal oxide with anti-phase boundaries (APBs) cannot be described by the conventional transversal MR for a single magnetic domain. The effect of electron scattering at the APBs may have to be considered. Angular dependence of the transversal MR at low temperature further indicates that the current explanation of the origin of transversal MR on the basis of anisotropic MR alone may not be sufficient for a system experiencing charge ordering.

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Transversal magneto-resistance in epitaxial Fe ₃O ₄ and Fe ₃O ₄/NiO exchange biased system

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