Magnetic properties of stoichiometric and nonstoichiometric ultrathin Fe3O4(111) films on AI2O3(0001)

F. Schedin; E. W. Hill; G. Van Der Laan; G. Thornton

doi:10.1063/1.1762715

Magnetic properties of stoichiometric and nonstoichiometric ultrathin Fe3O4(111) films on AI2O3(0001)

F. Schedin, E. W. Hill, G. Van Der Laan, G. Thornton

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

Abstract

The composition and magnetic properties of ultrathin iron oxide films grown epitaxially on Al2O3 (0001) were characterized. Using x ray magnetic circular dichroism (XMCD), the growth conditions for the well ordered epitaxial films with Fe3O4 stoichiometry were analyzed. The nonstoichiometric films, in addition to a relative reduction in Fe2+ ions, were found to exhibit a net transfer of Fe3+ from tetrahedral to octahedral sites. The in-plane magnetoresistance for both these films were found out to be 1% at room temperature in a field of 1T even though the electrical conductivity differed by a factor of 5.

Original language	English
Pages (from-to)	1165-1169
Number of pages	4
Journal	Journal of Applied Physics
Volume	96
Issue number	2
DOIs	https://doi.org/10.1063/1.1762715
Publication status	Published - 15 Jul 2004

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10.1063/1.1762715

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title = "Magnetic properties of stoichiometric and nonstoichiometric ultrathin Fe3O4(111) films on AI2O3(0001)",

abstract = "The composition and magnetic properties of ultrathin iron oxide films grown epitaxially on Al2O3 (0001) were characterized. Using x ray magnetic circular dichroism (XMCD), the growth conditions for the well ordered epitaxial films with Fe3O4 stoichiometry were analyzed. The nonstoichiometric films, in addition to a relative reduction in Fe2+ ions, were found to exhibit a net transfer of Fe3+ from tetrahedral to octahedral sites. The in-plane magnetoresistance for both these films were found out to be 1% at room temperature in a field of 1T even though the electrical conductivity differed by a factor of 5.",

author = "F. Schedin and Hill, {E. W.} and {Van Der Laan}, G. and G. Thornton",

year = "2004",

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doi = "10.1063/1.1762715",

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journal = "Journal of Applied Physics",

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publisher = "American Institute of Physics",

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T1 - Magnetic properties of stoichiometric and nonstoichiometric ultrathin Fe3O4(111) films on AI2O3(0001)

AU - Schedin, F.

AU - Hill, E. W.

AU - Van Der Laan, G.

AU - Thornton, G.

PY - 2004/7/15

Y1 - 2004/7/15

N2 - The composition and magnetic properties of ultrathin iron oxide films grown epitaxially on Al2O3 (0001) were characterized. Using x ray magnetic circular dichroism (XMCD), the growth conditions for the well ordered epitaxial films with Fe3O4 stoichiometry were analyzed. The nonstoichiometric films, in addition to a relative reduction in Fe2+ ions, were found to exhibit a net transfer of Fe3+ from tetrahedral to octahedral sites. The in-plane magnetoresistance for both these films were found out to be 1% at room temperature in a field of 1T even though the electrical conductivity differed by a factor of 5.

AB - The composition and magnetic properties of ultrathin iron oxide films grown epitaxially on Al2O3 (0001) were characterized. Using x ray magnetic circular dichroism (XMCD), the growth conditions for the well ordered epitaxial films with Fe3O4 stoichiometry were analyzed. The nonstoichiometric films, in addition to a relative reduction in Fe2+ ions, were found to exhibit a net transfer of Fe3+ from tetrahedral to octahedral sites. The in-plane magnetoresistance for both these films were found out to be 1% at room temperature in a field of 1T even though the electrical conductivity differed by a factor of 5.

U2 - 10.1063/1.1762715

DO - 10.1063/1.1762715

M3 - Article

SN - 1089-7550

VL - 96

SP - 1165

EP - 1169

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 2

ER -

Magnetic properties of stoichiometric and nonstoichiometric ultrathin Fe3O4(111) films on AI2O3(0001)

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