Magnetic properties of ultrathin magnetite films grown by molecular beam epitaxy

S. K. Arora; Han Chun Wu; Hongzhi Yao; W. Y. Ching; R. J. Choudhary; I. V. Shvets; O. N. Mryasov

doi:10.1109/TMAG.2008.2003173

Magnetic properties of ultrathin magnetite films grown by molecular beam epitaxy

S. K. Arora, Han Chun Wu, Hongzhi Yao, W. Y. Ching, R. J. Choudhary, I. V. Shvets, O. N. Mryasov

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

14 Citations (Scopus)

Abstract

Magnetic properties as a function of film thickness (2-55 nm) for magnetite (Fe₃O₄) thin films grown on MgO (100) substrates show that the small thickness films (≤ 5 nm) are ferromagnetic and possess magnetization values which are much greater than that of bulk Fe ₃O₄. The inverse thickness dependence of the magnetization points to an interface related mechanism. Whereas, our detailed spin polarized density functional theoretical calculations suggests that there is only a marginal enhancement in the local spin moments of Fe-atom in the vicinity of the Fe₃ O₄-MgO interface and it turns out that the noncompensation of spin moments between the two magnetic sublattices of spinel Fe₃ O₄ is a major factor contributing to the enhancement of magnetization.

Original language	English
Pages (from-to)	2628-2631
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	44
Issue number	11 PART 2
DOIs	https://doi.org/10.1109/TMAG.2008.2003173
Publication status	Published - Nov 2008
Externally published	Yes

Keywords

Epitaxial layers
Interface phenomena
Magnetite
Surfaces

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10.1109/TMAG.2008.2003173

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title = "Magnetic properties of ultrathin magnetite films grown by molecular beam epitaxy",

abstract = "Magnetic properties as a function of film thickness (2-55 nm) for magnetite (Fe3O4) thin films grown on MgO (100) substrates show that the small thickness films (≤ 5 nm) are ferromagnetic and possess magnetization values which are much greater than that of bulk Fe 3O4. The inverse thickness dependence of the magnetization points to an interface related mechanism. Whereas, our detailed spin polarized density functional theoretical calculations suggests that there is only a marginal enhancement in the local spin moments of Fe-atom in the vicinity of the Fe3 O4-MgO interface and it turns out that the noncompensation of spin moments between the two magnetic sublattices of spinel Fe3 O4 is a major factor contributing to the enhancement of magnetization.",

keywords = "Epitaxial layers, Interface phenomena, Magnetite, Surfaces",

author = "Arora, {S. K.} and Wu, {Han Chun} and Hongzhi Yao and Ching, {W. Y.} and Choudhary, {R. J.} and Shvets, {I. V.} and Mryasov, {O. N.}",

year = "2008",

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language = "English",

volume = "44",

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journal = "IEEE Transactions on Magnetics",

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TY - JOUR

T1 - Magnetic properties of ultrathin magnetite films grown by molecular beam epitaxy

AU - Arora, S. K.

AU - Wu, Han Chun

AU - Yao, Hongzhi

AU - Ching, W. Y.

AU - Choudhary, R. J.

AU - Shvets, I. V.

AU - Mryasov, O. N.

PY - 2008/11

Y1 - 2008/11

N2 - Magnetic properties as a function of film thickness (2-55 nm) for magnetite (Fe3O4) thin films grown on MgO (100) substrates show that the small thickness films (≤ 5 nm) are ferromagnetic and possess magnetization values which are much greater than that of bulk Fe 3O4. The inverse thickness dependence of the magnetization points to an interface related mechanism. Whereas, our detailed spin polarized density functional theoretical calculations suggests that there is only a marginal enhancement in the local spin moments of Fe-atom in the vicinity of the Fe3 O4-MgO interface and it turns out that the noncompensation of spin moments between the two magnetic sublattices of spinel Fe3 O4 is a major factor contributing to the enhancement of magnetization.

AB - Magnetic properties as a function of film thickness (2-55 nm) for magnetite (Fe3O4) thin films grown on MgO (100) substrates show that the small thickness films (≤ 5 nm) are ferromagnetic and possess magnetization values which are much greater than that of bulk Fe 3O4. The inverse thickness dependence of the magnetization points to an interface related mechanism. Whereas, our detailed spin polarized density functional theoretical calculations suggests that there is only a marginal enhancement in the local spin moments of Fe-atom in the vicinity of the Fe3 O4-MgO interface and it turns out that the noncompensation of spin moments between the two magnetic sublattices of spinel Fe3 O4 is a major factor contributing to the enhancement of magnetization.

KW - Epitaxial layers

KW - Interface phenomena

KW - Magnetite

KW - Surfaces

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U2 - 10.1109/TMAG.2008.2003173

DO - 10.1109/TMAG.2008.2003173

M3 - Article

AN - SCOPUS:68949125334

SN - 0018-9464

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EP - 2631

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 11 PART 2

ER -

Magnetic properties of ultrathin magnetite films grown by molecular beam epitaxy

Abstract

Keywords

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