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Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions. / Zhuravlev, M. Ye; Velev, J.; Vedyayev, A. V.; Tsymbal, E. Y.

In: Journal of Magnetism and Magnetic Materials, Vol. 300, No. 1, 01.05.2006, p. e277-e280.

Research output: Contribution to journal › Conference article › peer-review

Harvard

Zhuravlev, MY, Velev, J, Vedyayev, AV & Tsymbal, EY 2006, 'Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions', Journal of Magnetism and Magnetic Materials, vol. 300, no. 1, pp. e277-e280. https://doi.org/10.1016/j.jmmm.2005.10.099

APA

Zhuravlev, M. Y., Velev, J., Vedyayev, A. V., & Tsymbal, E. Y. (2006). Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions. Journal of Magnetism and Magnetic Materials, 300(1), e277-e280. https://doi.org/10.1016/j.jmmm.2005.10.099

Vancouver

Zhuravlev MY, Velev J, Vedyayev AV, Tsymbal EY. Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions. Journal of Magnetism and Magnetic Materials. 2006 May 1;300(1):e277-e280. https://doi.org/10.1016/j.jmmm.2005.10.099

Author

Zhuravlev, M. Ye ; Velev, J. ; Vedyayev, A. V. ; Tsymbal, E. Y. / Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions. In: Journal of Magnetism and Magnetic Materials. 2006 ; Vol. 300, No. 1. pp. e277-e280.

BibTeX

@article{5eb492783e3c42adba892c1154166af4,
title = "Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions",
abstract = "We have investigated the interlayer exchange coupling (IEC) in Fe/MgO/Fe(0 0 1) tunnel junctions with and without oxygen vacancies in MgO, using model and density functional calculations. The model predicts that IEC changes sign from ferromagnetic to antiferromagnetic if a defect level matches the Fermi energy. Ab initio calculations show that for perfect junctions, IEC is ferromagnetic and decreases exponentially with MgO thickness. Oxygen vacancies placed in the middle of MgO make IEC antiferromagnetic for three monolayers (MLs) of MgO, but do not change the sign of IEC for five MLs. The latter fact is explained within the model, which suggests that for the impurity level lying below the Fermi energy IEC can change sign with increasing barrier thickness due to the weaker coupling of the impurity level to the ferromagnets.",
keywords = "Ab initio calculations, Impurity, Interlayer exchange coupling, Magnetic tunnel junction, O vacancy, Spin current",
author = "Zhuravlev, {M. Ye} and J. Velev and Vedyayev, {A. V.} and Tsymbal, {E. Y.}",
year = "2006",
month = may,
day = "1",
doi = "10.1016/j.jmmm.2005.10.099",
language = "English",
volume = "300",
pages = "e277--e280",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",
number = "1",
note = "Third International Symposium on Magnetism 2005 ; Conference date: 26-06-2005 Through 30-06-2005",

}

RIS

TY - JOUR

T1 - Effect of oxygen vacancies on interlayer exchange coupling in Fe/MgO/Fe tunnel junctions

AU - Zhuravlev, M. Ye

AU - Velev, J.

AU - Vedyayev, A. V.

AU - Tsymbal, E. Y.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - We have investigated the interlayer exchange coupling (IEC) in Fe/MgO/Fe(0 0 1) tunnel junctions with and without oxygen vacancies in MgO, using model and density functional calculations. The model predicts that IEC changes sign from ferromagnetic to antiferromagnetic if a defect level matches the Fermi energy. Ab initio calculations show that for perfect junctions, IEC is ferromagnetic and decreases exponentially with MgO thickness. Oxygen vacancies placed in the middle of MgO make IEC antiferromagnetic for three monolayers (MLs) of MgO, but do not change the sign of IEC for five MLs. The latter fact is explained within the model, which suggests that for the impurity level lying below the Fermi energy IEC can change sign with increasing barrier thickness due to the weaker coupling of the impurity level to the ferromagnets.

AB - We have investigated the interlayer exchange coupling (IEC) in Fe/MgO/Fe(0 0 1) tunnel junctions with and without oxygen vacancies in MgO, using model and density functional calculations. The model predicts that IEC changes sign from ferromagnetic to antiferromagnetic if a defect level matches the Fermi energy. Ab initio calculations show that for perfect junctions, IEC is ferromagnetic and decreases exponentially with MgO thickness. Oxygen vacancies placed in the middle of MgO make IEC antiferromagnetic for three monolayers (MLs) of MgO, but do not change the sign of IEC for five MLs. The latter fact is explained within the model, which suggests that for the impurity level lying below the Fermi energy IEC can change sign with increasing barrier thickness due to the weaker coupling of the impurity level to the ferromagnets.

KW - Ab initio calculations

KW - Impurity

KW - Interlayer exchange coupling

KW - Magnetic tunnel junction

KW - O vacancy

KW - Spin current

UR - http://www.scopus.com/inward/record.url?scp=33644645645&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2005.10.099

DO - 10.1016/j.jmmm.2005.10.099

M3 - Conference article

AN - SCOPUS:33644645645

VL - 300

SP - e277-e280

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 1

T2 - Third International Symposium on Magnetism 2005

Y2 - 26 June 2005 through 30 June 2005

ER -

ID: 51235073