Applied Physics Laboratory

The study of the structural, morphological and magnetic properties of alloys, thin and ultrathin films, granular solids and other nanostructured materials, as well as the study of surfaces and interfaces by means of Low Energy Electron Spectroscopy and the study of solid properties by Mössbauer Spectroscopy constitute the objectives of the laboratory. For the production of these nanostructures, the main techniques used are Magnetron Sputtering (DC and RF) deposition and also via Molecular Beam Epitaxy (MBE). The investigations are carried out using techniques such as Mössbauer spectroscopy of 57Fe and 119Sn, in transmission or conversion electron geometry (CEMS), at temperatures ranging from 4 K to 900 K, by conventional analyses (X-ray diffraction and X-ray fluorescence), and by analyses using low-energy electron spectroscopy techniques (LEED - Low Energy Electron Diffraction, XPS - X-ray Photoelectron Spectroscopy), magnetometry by Kerr effect in polar and longitudinal configurations (MOKE, magneto-optical Kerr effect), magnetometry by vibrating sample (VSM, Vibrating Sample Magnetometer), and magnetoresistance measurement system.

Contact: 

Waldemar Augusto de Almeida Macedo - wmacedo@cdtn.br