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Fabrication of FeOx thin films and the modulation of transport and magnetic properties by resistance switching in Au/α-Fe2O3/Pt heterostructure.
- Source :
- Journal of Applied Physics; 2014, Vol. 115 Issue 17, p17C306-1-17C306-3, 3p
- Publication Year :
- 2014
-
Abstract
- It was found that by using the same α-Fe<subscript>2</subscript>O<subscript>3</subscript> target in fabrication process, an oxygen-deficient and an oxygen-sufficient atmosphere facilitated the formation of Fe<subscript>3</subscript>O<subscript>4</subscript> and α-Fe<subscript>2</subscript>O<subscript>3</subscript>, respectively. The Au/α-Fe<subscript>2</subscript>O<subscript>3</subscript>/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<subscript>2</subscript>O<subscript>3</subscript>/Pt heterostructure are believed to result from an enhanced electron hopping between Fe<superscript>3+</superscript>-Fe<superscript>2+</superscript> pairs and Fe<superscript>3+</superscript>-O-Fe<superscript>2+</superscript> double exchange coupling effect. The enhanced Fe<superscript>2+</superscript> comes from a redox transition between two phases (one behaves like Fe<subscript>3</subscript>O<subscript>4</subscript> and the other like α-Fe<subscript>2</subscript>O<subscript>3</subscript>), due to the electrochemical migration of oxygen vacancies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 115
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 95982647
- Full Text :
- https://doi.org/10.1063/1.4868077