Tunneling interlayer exchange coupling between oxide ferrimagnets: Analysis for Fe3 O4 /vac/ Fe3 O4 case

Han Chun Wu; O. N. Mryasov; K. Radican; I. V. Shvets

doi:10.1063/1.3167360

Tunneling interlayer exchange coupling between oxide ferrimagnets: Analysis for _Fe3 O₄ /vac/ Fe₃ O₄ case

Han Chun Wu^*, O. N. Mryasov, K. Radican, I. V. Shvets

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

We have investigated tunneling interlayer exchange coupling (TIEC) between ferrimagnetic Fe₃ O₄ films via a tunneling barrier. In this investigation we employ ab initio density functional theory to study a generic tunneling junction incorporating ferrimagnets Fe₃ O ₄ /vac/ Fe₃ O₄. In contrast with previously established TIEC theory, calculated thickness dependence is nonmonotonic and accompanied by TIEC sign change. Our calculations clearly demonstrate that TIEC is controlled mainly by an interfacial oxygen induced spin polarization. These results emphasize the importance of localized and strongly directional electronic interactions at the interface, thus showing limitations of free electron model treatment of the problem.

Original language	English
Article number	262506
Journal	Applied Physics Letters
Volume	94
Issue number	26
DOIs	https://doi.org/10.1063/1.3167360
Publication status	Published - 2009
Externally published	Yes

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title = "Tunneling interlayer exchange coupling between oxide ferrimagnets: Analysis for Fe3 O4 /vac/ Fe3 O4 case",

abstract = "We have investigated tunneling interlayer exchange coupling (TIEC) between ferrimagnetic Fe3 O4 films via a tunneling barrier. In this investigation we employ ab initio density functional theory to study a generic tunneling junction incorporating ferrimagnets Fe3 O 4 /vac/ Fe3 O4. In contrast with previously established TIEC theory, calculated thickness dependence is nonmonotonic and accompanied by TIEC sign change. Our calculations clearly demonstrate that TIEC is controlled mainly by an interfacial oxygen induced spin polarization. These results emphasize the importance of localized and strongly directional electronic interactions at the interface, thus showing limitations of free electron model treatment of the problem.",

author = "Wu, {Han Chun} and Mryasov, {O. N.} and K. Radican and Shvets, {I. V.}",

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T2 - Analysis for Fe3 O4 /vac/ Fe3 O4 case

AU - Wu, Han Chun

AU - Mryasov, O. N.

AU - Radican, K.

AU - Shvets, I. V.

PY - 2009

Y1 - 2009

N2 - We have investigated tunneling interlayer exchange coupling (TIEC) between ferrimagnetic Fe3 O4 films via a tunneling barrier. In this investigation we employ ab initio density functional theory to study a generic tunneling junction incorporating ferrimagnets Fe3 O 4 /vac/ Fe3 O4. In contrast with previously established TIEC theory, calculated thickness dependence is nonmonotonic and accompanied by TIEC sign change. Our calculations clearly demonstrate that TIEC is controlled mainly by an interfacial oxygen induced spin polarization. These results emphasize the importance of localized and strongly directional electronic interactions at the interface, thus showing limitations of free electron model treatment of the problem.

AB - We have investigated tunneling interlayer exchange coupling (TIEC) between ferrimagnetic Fe3 O4 films via a tunneling barrier. In this investigation we employ ab initio density functional theory to study a generic tunneling junction incorporating ferrimagnets Fe3 O 4 /vac/ Fe3 O4. In contrast with previously established TIEC theory, calculated thickness dependence is nonmonotonic and accompanied by TIEC sign change. Our calculations clearly demonstrate that TIEC is controlled mainly by an interfacial oxygen induced spin polarization. These results emphasize the importance of localized and strongly directional electronic interactions at the interface, thus showing limitations of free electron model treatment of the problem.

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DO - 10.1063/1.3167360

M3 - Article

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SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 262506

ER -

Tunneling interlayer exchange coupling between oxide ferrimagnets: Analysis for _Fe3 O₄ /vac/ Fe₃ O₄ case

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