Fe3O4(111) thin films with bulk-like properties: growth and atomic characterization

Kosuke Matsuzaki; Vlado K. Lazarov; Leonardo Lari; Hideo Hosono; Tomofumi Susaki

doi:10.1088/0022-3727/46/2/022001

Fe3O4(111) thin films with bulk-like properties: growth and atomic characterization

Kosuke Matsuzaki^*, Vlado K. Lazarov, Leonardo Lari, Hideo Hosono, Tomofumi Susaki

^*Corresponding author for this work

Physics

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

Abstract

Growth defects, domain structures and off-stoichiometric compositional deviation are the cause of significant deviation of magnetic and transport properties of magnetite (Fe3O4) thin films. We show that these anomalous properties can be fully controlled by postannealing in CO/CO2 atmosphere. Aberration corrected electron microscopy has revealed a full structural transformation from Fe/FeOx to Fe3O4 and a drastic reduction of growth defects in the postannealed films. The magnetic and magnetotransport measurements show that postannealed film properties are bulk-like: the magnetization was fully saturated with similar to 480 emu cm(-3), as in bulk single crystal, and the negative magnetoresistance was suppressed an order of magnitude.

Original language	English
Article number	ARTN 022001
Number of pages	5
Journal	Journal of Physics D: Applied Physics
Volume	46
Issue number	2
DOIs	https://doi.org/10.1088/0022-3727/46/2/022001
Publication status	Published - 16 Jan 2013

Keywords

MAGNETITE FE3O4
MAGNETORESISTANCE
VERWEY TRANSITION
PHASE
POINT
ANISOTROPY
TEMPERATURE

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10.1088/0022-3727/46/2/022001

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abstract = "Growth defects, domain structures and off-stoichiometric compositional deviation are the cause of significant deviation of magnetic and transport properties of magnetite (Fe3O4) thin films. We show that these anomalous properties can be fully controlled by postannealing in CO/CO2 atmosphere. Aberration corrected electron microscopy has revealed a full structural transformation from Fe/FeOx to Fe3O4 and a drastic reduction of growth defects in the postannealed films. The magnetic and magnetotransport measurements show that postannealed film properties are bulk-like: the magnetization was fully saturated with similar to 480 emu cm(-3), as in bulk single crystal, and the negative magnetoresistance was suppressed an order of magnitude.",

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T2 - growth and atomic characterization

AU - Matsuzaki, Kosuke

AU - Lazarov, Vlado K.

AU - Lari, Leonardo

AU - Hosono, Hideo

AU - Susaki, Tomofumi

PY - 2013/1/16

Y1 - 2013/1/16

N2 - Growth defects, domain structures and off-stoichiometric compositional deviation are the cause of significant deviation of magnetic and transport properties of magnetite (Fe3O4) thin films. We show that these anomalous properties can be fully controlled by postannealing in CO/CO2 atmosphere. Aberration corrected electron microscopy has revealed a full structural transformation from Fe/FeOx to Fe3O4 and a drastic reduction of growth defects in the postannealed films. The magnetic and magnetotransport measurements show that postannealed film properties are bulk-like: the magnetization was fully saturated with similar to 480 emu cm(-3), as in bulk single crystal, and the negative magnetoresistance was suppressed an order of magnitude.

AB - Growth defects, domain structures and off-stoichiometric compositional deviation are the cause of significant deviation of magnetic and transport properties of magnetite (Fe3O4) thin films. We show that these anomalous properties can be fully controlled by postannealing in CO/CO2 atmosphere. Aberration corrected electron microscopy has revealed a full structural transformation from Fe/FeOx to Fe3O4 and a drastic reduction of growth defects in the postannealed films. The magnetic and magnetotransport measurements show that postannealed film properties are bulk-like: the magnetization was fully saturated with similar to 480 emu cm(-3), as in bulk single crystal, and the negative magnetoresistance was suppressed an order of magnitude.

KW - MAGNETITE FE3O4

KW - MAGNETORESISTANCE

KW - VERWEY TRANSITION

KW - PHASE

KW - POINT

KW - ANISOTROPY

KW - TEMPERATURE

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DO - 10.1088/0022-3727/46/2/022001

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JO - Journal of Physics D: Applied Physics

JF - Journal of Physics D: Applied Physics

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M1 - ARTN 022001

ER -

Fe3O4(111) thin films with bulk-like properties: growth and atomic characterization

Abstract

Keywords

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