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Magnetoresistance in Thin Films Deposited by the Magnetron Sputtering Method

Project summary

The experimental process provides the student with a better way of learning because the student is not only observing the material being applied, but manipulating the materials when performing the experiments. The insertion of the Giant Magnetoresistance contextualization for high school students is of great importance because this technology is present in our daily lives. Introducing theoretical concepts seeking to arouse students' curiosity, greatly contributes to the academic development of students. Reflectivity measurements (low angle) of films made from materials to be deposited were performed and with this we determined the deposition rates for Co and Cu to be 0,25 Angstron/s and 1,07 Angstron/s, respectively. This way we go to the next stage of deposition. We performed the characterization of a film [Co(10 Å)/Cu(15 Å)]15 through resistance measurements, using the four-point method under the action of a magnetic field ranging from -1,5 T to 1,5 T, having presented Magnetoresistance (MR) of approximately 3,5% at room temperature and 7% at 50 K. The characterized film was prepared using the Magnetron Sputtering equipment at room temperature. We conclude that the present deposited sample is promising for use in the sensor, as the literature shows that by changing the thickness and quantity of layers, MR of up to 40% can be obtained at room temperature. The sensor circuit is at an early stage and needs further improvement. A test bed for the film was made using 3D Sketchup modeling software. Keywords: Thin films, giant magnetoresistance, Magnetron Sputtering

Students

Raphael Nunes da Silva Moreira Souza

Guidance counsellors

Isabel Liz Castro Merino

Institution

Federal Center for Technological Education Celso Suckow da Fonseca (CEFET RJ) – Maracanã Campus
Rio de Janeiro /
  RJ -
  Brazil

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Waldir da Silva Souza
Waldir da Silva Souza
1 year ago

Very interesting and promising work due to the huge variety of use of thin films in the most varied areas. And understanding the effects of Magnetoresistance becomes fundamental!! Congratulations for the project, contributing to the development of the research spirit in the new researchers, as well as to the scientific development of the country!! Success!!

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Popular vote*

Did you like it? So vote and share now:

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Students

Raphael Nunes da Silva Moreira Souza

Guidance counsellors

Isabel Liz Castro Merino

Institution

Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET RJ) – Campus Maracanã
  RJ –
  Brasil

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