Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/39410
Título: | Enhanced resistive switching and multilevel behavior in bilayered HfAlO/HfAlOx structures for non-volatile memory applications |
Autor(es): | Faita, F. L. Silva, J. P. B. Pereira, Mário Gomes, M. J. M. |
Palavras-chave: | Resistive switching |
Data: | 18-Dez-2015 |
Editora: | AIP Publishing |
Revista: | Applied Physics Letters |
Resumo(s): | In this work, hafnium aluminum oxide (HfAlO) thin films were deposited by ion beam sputtering deposition technique on Si substrate. The presence of oxygen vacancies in the HfAlOx layer deposited in oxygen deficient environment is evidenced from the photoluminescence spectra. Furthermore, HfAlO(oxygen rich)/HfAlOx(oxygen poor) bilayer structures exhibit multilevel resistive switching (RS), and the switching ratio becomes more prominent with increasing the HfAlO layer thickness. The bilayer structure with HfAlO/HfAlOx thickness of 30/40 nm displays the enhanced multilevel resistive switching characteristics, where the high resistance state/ intermediate resistance state (IRS) and IRS/low resistance state resistance ratios are 102 and 5 105 , respectively. The switching mechanisms in the bilayer structures were investigated by the temperature dependence of the three resistance states. This study revealed that the multilevel RS is attributed to the coupling of ionic conduction and the metallic conduction, being the first associated to the formation and rupture of conductive filaments related to oxygen vacancies and the second with the formation of a metallic filament. Moreover, the bilayer structures exhibit good endurance and stability in time. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39410 |
DOI: | 10.1063/1.4937801 |
ISSN: | 0003-6951 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FMNC - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1.4937801.pdf Acesso restrito! | 1,41 MB | Adobe PDF | Ver/Abrir |