Abstracts Book - IMRC 2018

• SD7-P021
SYNTHESIS AND CHARACTERIZATION OF Fe-Cu MULTILAYER
THIN FILMS SYNTHETIZED BY SPUTTERING METHOD
Jes?s Angel Arenas Alatorre 1 , Víctor Manuel Mendoza Pérez 2 , Héctor Cruz Manjarrez 1
1 Universidad Nacional Autónoma de México, Instituto de Física, Mexico. 2 Universidad
Politécnica del Valle de México, Naotecnología, Mexico.
Magnetic properties of Fe-Cu system at nano scale exhibit novel properties, such
as, giant magnetoresistance, superparamagnetism and high magnetic
coercivity, however, it has not yet been fully established whether these
properties are due to nanoparticles core-shell or at some bimetallic crystalline
phase. In this work we study the crystal growth of Fe-Cu thin films grown by
sputtering technique. During the synthesis, two ferromagnetic layers of Fe were
separated by an ultra-thin film of about 10 nm of a non-ferromagnetic metal
(Cu). Microstructural characterization of thin films were characterized by
Transmission Electron Microscopy (TEM), scanning electron microscopy (FSEM),
Energy Dispersive X-ray Spectroscopy (EDS) and Atomic Force Microscopy (AFM).
The FSEM image obtained with secondary electrons shown thin films with
thickness in the range 10 - 90.8 nm. By High Resolution Transmission Electron
Microscopy (HRTEM) were identified the phases Fe2O3 and CuO, intermetallic
phases not were identified. Also were identified Moiré patterns, indicating two
overlapping lattices associated with Fe and Cu crystalline phases. By AFM was
found that the surface of the film was not uniform, this could be explained with
the nucleation model of Volmer – Weber. This work received financial support
from the projects PAPIIT IN108418
Acknowledgment:
This work was supported by Dirección General de Asuntos del Personal
Académico-Universidad Nacional Autónoma de México (DGAPA-UNAM), project
IN108418. We also thank to M.Sc. Jaqueline Cañetas, M.Sc. Manuel Aguilar and
Roberto Hernández by technical assistance in Electron microscopy and AFM. To
Diego Quiterio by sample preparation.
Keywords: Fe-Cu, multilayer thin films, sputtering
Presenting authors email: jarenas@fisica.unam.mx