Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3700728
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Funding
- National Research Foundation of Korea
- Ministry of Education, Science and Technology [R32-2009-000-10124-0, 2010-0017004]
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Several rare earth elements (Gd, Dy, and Ce) having different valence numbers were doped into a solution-synthesized ZrO2 film, and the corresponding resistive memory characteristics were discussed in relation to the oxygen vacancies and film microstructure. Pure and trivalent ion-doped ZrO2 films showed forming-free behavior, probably because of the large amount of inherent and additional dopant-incurred oxygen vacancies, respectively. In contrast, tetravalent Ce ion doping caused the forming process to be required and afforded stable long-term switching characteristics with a relatively large memory window, which is attributed to the dopant-enhanced crystallization/densification effect without excessive oxygen vacancy generation. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3700728]
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