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PhD Theses

Milena Cervo Sulzbach will defend her PhD Thesis on Wednesday, 26 May 2021, at 3 pm!

The PhD researcher Milena Cervo Sulzbach from the Multifunctional Thin Films and Complex Structures (MULFOX) group (ICMAB, CSIC), will defend her PhD thesis on Wednesday, 26 May 2021, at 3 pm in an hybrid session, from the ICMAB Seminar Room "Carles Miravitlles", which will be also possible to follow online by Zoom.
Anna
May 12, 2021

Resistive Switching in Hf0.5Zr0.5O2 ferroelectric tunnel junctions

 

by Milena Cervo Sulzbach, Multifunctional Thin Films and Complex Structures (MULFOX) group (ICMAB, CSIC)

Date: Wednesday, 26 May 2021
Time: 3 pm
Venue: ICMAB Seminar Room "Carles Miravitlles" and online session by Zoom. Register here to attend by Zoom.

Abstract: HfO2-based oxides have been explored as ReRAM elements due to their resistance change caused by redox reactions. However, the discovery of ferroelectricity in doped-HfO2 opens doors to use polarization reversal as a phenomenon to control the resistance. Here, Hf0.5Zr0.5O2 epitaxial ferroelectric tunnel junctions with thickness smaller than 5 nanometers are studied. Electrical and structural analyses have allowed identifying the coexistence of genuine ferroelectric switching and ionic-like motion as mechanisms to induce resistance change in the same junction. By engineering the film's microstructure, the ferroelectric switching was optimized and the ionic motion was suppressed. In addition, its memristive behavior were. The results presented indicate HZO tunnel junctions are feasible alternatives for application in non-volatile memories.

Supervisor:

  • Josep Fontcuberta, MULFOX, ICMAB, CSIC

PhD Committee:

  • President: Gustau Catalán, Institut Català de Nanociència i Nanotecnologia ICN2 - Spain
  • Secretary: Anna Palau, Institut de Ciència de Materials de Barcelona ICMAB-CSIC - Spain
  • Vocal: Christian Rinaldi, Politecnico di Milano - Italy

Tutor UAB:

  • Jordi Sort Viñas, Physics Department, UAB

University: Universitat Autònoma de Barcelona (UAB)
PhD Programme: Physics

 MILENA THESIS

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