Fabrication of FeO{sub x} thin films and the modulation of transport and magnetic properties by resistance switching in Au/α-Fe{sub 2}O{sub 3}/Pt heterostructure

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4868077· OSTI ID:22273719

Yun, C.; Chen, X. G.; Fu, J. B.; Zhang, Y. X.; Sun, J. R.; Wang, Y. F.; Zhang, Y.; Liu, S. Q.; Lian, G. J.; Yang, Y. C.

It was found that by using the same α-Fe{sub 2}O{sub 3} target in fabrication process, an oxygen-deficient and an oxygen-sufficient atmosphere facilitated the formation of Fe{sub 3}O{sub 4} and α-Fe{sub 2}O{sub 3}, respectively. The Au/α-Fe{sub 2}O{sub 3}/Pt heterostructure showed a memristive bipolar resistance switching. A clear difference was observed in the transport and magnetic properties between the two resistance states. The enhanced conductivity and magnetization in the Au/α-Fe{sub 2}O{sub 3}/Pt heterostructure are believed to result from an enhanced electron hopping between Fe{sup 3+}-Fe{sup 2+} pairs and Fe{sup 3+}-O-Fe{sup 2+} double exchange coupling effect. The enhanced Fe{sup 2+} comes from a redox transition between two phases (one behaves like Fe{sub 3}O{sub 4} and the other like α-Fe{sub 2}O{sub 3}), due to the electrochemical migration of oxygen vacancies.

• OSTI ID: 22273719
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
ELECTRIC CONDUCTIVITY
ELECTROCHEMISTRY
ELECTRONS
GOLD
HETEROJUNCTIONS
INTERFACES
IRON IONS
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
OXYGEN
PLATINUM
THIN FILMS
VACANCIES