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Title: 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

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.
Authors:
; ; ; ; ; ; ; ; ; ; ;  [1]
  1. State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
22273719
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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