Magnetism and magnetotransport in symmetry matched spinels: Fe{sub 3}O{sub 4}/MgAl{sub 2}O{sub 4}

Journal Article · Tue May 07 04:00:00 EDT 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4800690· OSTI ID:22102393

Gilks, D.; Thompson, S. ^[1]; Lari, L.; Lazarov, V. K. ^[1]; Cai, Z.; Ziemer, K. ^[2]; Cespedes, O. ^[3]; Gerber, A. ^[4]

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1. Department of Physics, University of York, Heslington, York YO10 5DD (United Kingdom)
2. Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115-5000 (United States)
3. School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT (United Kingdom)
4. School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel)

In this work, we show that Fe{sub 3}O{sub 4} films grown by oxygen plasma assisted molecular beam epitaxy have anomalous magnetic properties such as negative magnetoresistance and high saturation magnetic fields. The film substrate mismatch of 3% is relieved by the formation of misfit dislocations at the interface. Transmission electron microscopy results show that misfit dislocations are not the cause of antiphase domain boundary (APB). This suggests that in this system APB formation is a property of the three dimensional Fe{sub 3}O{sub 4} growth.

• OSTI ID: 22102393
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 113; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINATES
DISLOCATIONS
FERRITES
FILMS
INTERFACES
IRON OXIDES
LAYERS
MAGNESIUM COMPOUNDS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETORESISTANCE
MOLECULAR BEAM EPITAXY
OXYGEN
SATURATION
SPINELS
SUBSTRATES
SYMMETRY
TRANSMISSION ELECTRON MICROSCOPY