Banca de QUALIFICAÇÃO: CARLOS ADOLFO VILCA HUAYHUA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : CARLOS ADOLFO VILCA HUAYHUA
DATE: 21/12/2023
TIME: 10:00
LOCAL: Remoto
TITLE:

Influence of Transition Metal Doping on the Structural, Optical, Electrical and Magnetic Properties of ITO Films Grown by DC Sputtering.

KEY WORDS:

DC sputtering, MT doped ITO, Transparent conductive oxide, Dilute magnetic conductive oxide, magnetic properties.

PAGES: 48
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

Technologies based on thin films of semiconducting oxides have been aroused considerable interest due to their attractive properties for the development of several optoelectronic devices. Tin-doped indium oxide (ITO) is recognized as a transparent conductor (TCO), exhibiting a low electrical resistivity (~10-4 ohm-cm) and high optical transmittance (>85%). The doping of ITO with transition metals introduces an additional degree of freedom, forming the Oxide-Diluted Magnetic Semiconductors (O-DMS). In recent years, O-DMS have been the subject of study due to the possibility of exhibiting magnetic order at room temperature, depending on the transition metal dopant and the film manufacturing process. It is known that the doping can influence the optical, electrical and magnetic properties of the TCO. However, the role of transition metals for the defects formation (cationic or anionic) in the ITO crystal structure, and its influence on the resultant charge carrier density, is not fully understood yet. Also, the origin of the magnetism in O-DMS remains unclear. In this sense, the present work aims to investigate the impact of the ITO doping with transition metals (Fe, Co or Ni) on its structural, optical, electrical and magnetic properties. It will be deposited metal transition doped ITO films using the DC sputtering technique. After the films deposition a comprehensive study will be carried out varying the dopant content in the ITO matrix and seeking to understand the underlying mechanisms in order to optimize the structural, optical, electrical and magnetic properties for potential applications in optoelectronic and spintronic.

COMMITTEE MEMBERS:
Externo à Instituição - LUIZ CARLOS CAMARGO MIRANDA NAGAMINE - USP
Externo à Instituição - RAMÓN RAUDEL PEÑA GARCIA - UFRPE
Externo à Instituição - JUAN CARLOS ROMERO AQUINO - UNI
Presidente - 1273560 - RICARDO GARGANO