This work focuses on Au/HfO2/TiN nonvolatile resistive memory [ resistive random access memories (RRAMs)] stacks, where HfO2 is deposited by the atomic layer deposition technique on TiN electrodes. For as-grown RRAMs, no Reset is observed (the structure remains locked in a low resistive state). It is observed that an NH3 plasma treatment of the HfO2/TiN bilayer can restore a Reset stage. X-ray photoelectron spectroscopy analyses showed that the Reset recovery is related to a modification of the HfO2/TiN interface via transformation of the TiON interfacial layer. Thus, postdeposition plasma treatments of the oxide/ electrode interface are identified as a valuable tool to improve the switching properties of oxide-based RRAMs. (C) 2011 American Vacuum Society. [DOI: 10.1116/1.3599825]
机构:
Univ Hong Kong, HKU CAS, Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China
Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R ChinaUniv Algarve, CEOT, P-8005139 Faro, Portugal
Roy, V. A. L.
Xu, Zong-Xiang
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Univ Hong Kong, HKU CAS, Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China
Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R ChinaUniv Algarve, CEOT, P-8005139 Faro, Portugal
Xu, Zong-Xiang
Xiang, Hai-Feng
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机构:
Univ Hong Kong, HKU CAS, Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China
Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R ChinaUniv Algarve, CEOT, P-8005139 Faro, Portugal
Xiang, Hai-Feng
Che, Chi-Ming
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机构:
Univ Hong Kong, HKU CAS, Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China
Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R ChinaUniv Algarve, CEOT, P-8005139 Faro, Portugal