I - V asymmetry and magnetoresistance in nickel nanoconstrictions

O. Céspedes; A. R. Rocha; S. Lioret; M. Viret; C. Dennis; J. F. Gregg; S. van Dijken; S. Sanvito; J. M D Coey

doi:10.1016/j.jmmm.2003.12.293

I - V asymmetry and magnetoresistance in nickel nanoconstrictions

O. Céspedes^*, A. R. Rocha, S. Lioret, M. Viret, C. Dennis, J. F. Gregg, S. van Dijken, S. Sanvito, J. M D Coey

^*Corresponding author for this work

Not published at Aalto University

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

11 Citations (Scopus)

Abstract

We present a joint experimental and theoretical study on the transport properties of nickel nanoconstrictions. The samples show highly non-linear and asymmetric I-V characteristics when the conductance is smaller than G ₀ = 2e²/h, and huge magnetoresistance ratios exceeding 99.9%. We model a single point contact in a two-band tight-binding model as a 2 × 2 nickel chain connected to two semi-infinite nickel leads. The magnetoresistance is calculated by using a non-equilibrium Green's function technique.

Original language	English
Pages (from-to)	1571-1572
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	Part 2
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.293
Publication status	Published - May 2004
MoE publication type	A1 Journal article-refereed

Keywords

Ballistic magnetoresistance
Electron transport theory
Nickel nanocontact
Spin polarized transport

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@article{7e880997688e48ae9a3ab83c0f7de82b,

title = "I - V asymmetry and magnetoresistance in nickel nanoconstrictions",

abstract = "We present a joint experimental and theoretical study on the transport properties of nickel nanoconstrictions. The samples show highly non-linear and asymmetric I-V characteristics when the conductance is smaller than G 0 = 2e2/h, and huge magnetoresistance ratios exceeding 99.9%. We model a single point contact in a two-band tight-binding model as a 2 × 2 nickel chain connected to two semi-infinite nickel leads. The magnetoresistance is calculated by using a non-equilibrium Green's function technique.",

keywords = "Ballistic magnetoresistance, Electron transport theory, Nickel nanocontact, Spin polarized transport",

author = "O. C{\'e}spedes and Rocha, {A. R.} and S. Lioret and M. Viret and C. Dennis and Gregg, {J. F.} and {van Dijken}, S. and S. Sanvito and Coey, {J. M D}",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.12.293",

language = "English",

volume = "272-276",

pages = "1571--1572",

journal = "Journal of Magnetism and Magnetic Materials ",

issn = "0304-8853",

publisher = "Elsevier Science B.V.",

number = "Part 2",

}

I - V asymmetry and magnetoresistance in nickel nanoconstrictions. / Céspedes, O.; Rocha, A. R.; Lioret, S.; Viret, M.; Dennis, C.; Gregg, J. F.; van Dijken, S.; Sanvito, S.; Coey, J. M D.

In: Journal of Magnetism and Magnetic Materials , Vol. 272-276, No. Part 2, 05.2004, p. 1571-1572.

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

TY - JOUR

T1 - I - V asymmetry and magnetoresistance in nickel nanoconstrictions

AU - Céspedes, O.

AU - Rocha, A. R.

AU - Lioret, S.

AU - Viret, M.

AU - Dennis, C.

AU - Gregg, J. F.

AU - van Dijken, S.

AU - Sanvito, S.

AU - Coey, J. M D

PY - 2004/5

Y1 - 2004/5

N2 - We present a joint experimental and theoretical study on the transport properties of nickel nanoconstrictions. The samples show highly non-linear and asymmetric I-V characteristics when the conductance is smaller than G 0 = 2e2/h, and huge magnetoresistance ratios exceeding 99.9%. We model a single point contact in a two-band tight-binding model as a 2 × 2 nickel chain connected to two semi-infinite nickel leads. The magnetoresistance is calculated by using a non-equilibrium Green's function technique.

AB - We present a joint experimental and theoretical study on the transport properties of nickel nanoconstrictions. The samples show highly non-linear and asymmetric I-V characteristics when the conductance is smaller than G 0 = 2e2/h, and huge magnetoresistance ratios exceeding 99.9%. We model a single point contact in a two-band tight-binding model as a 2 × 2 nickel chain connected to two semi-infinite nickel leads. The magnetoresistance is calculated by using a non-equilibrium Green's function technique.

KW - Ballistic magnetoresistance

KW - Electron transport theory

KW - Nickel nanocontact

KW - Spin polarized transport

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DO - 10.1016/j.jmmm.2003.12.293

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VL - 272-276

SP - 1571

EP - 1572

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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