Propriedades magnéticas de sistemas de Fe e Ir nanoestruturados
Fecha
2019-03-15Autor
http://lattes.cnpq.br/9051654243672851
SANTOS, Tulio Mota dos
AMARAL, Yahgo Sá
Metadatos
Mostrar el registro completo del ítemResumen
Nanomagnetism is an area of strong relevance to science and technology. The
possibility of understanding magnetic properties of nanostructured systems can
provide a chance to improve features of interest for systems sensitive to magnetism in
several fields of technological application. There are a variety of areas for which this
topic is relevant, like the computer industry, such as magnetic recording and even
biology as the case of magnetotatic bacteria. These comprehensions may allow us to
describe and understand, with support from theoretical and experimental physics,
complex magnetic structures formed from interaction competition. As the magnetic
behavior of systems organized in nanometric dimensions presents huge differences to
macroscopic systems (due to boundary conditions, such as number of neighboring
atoms and interactions), we will carry out a theoretical study with simulations using Fe
and Ir elements in nanostructured arrangements to investigate local properties from
the determination of their local density of states (LDOS). In order to do this, we will use
the RS-LMTO-ASA (Real Space - Linear Muffin-Tin Orbital) method based on the DFT
(Density Functional Theory) to provide an improved description of the structure of the
atoms of our interest. We will determine properties such as the magnetic moments of
Fe atoms starting from Fe bulk up to adatom and dimer arrangements treated as an
impurity causing perturbation on a surface of Ir. As well as the verification of the
appearance of a magnetic moment induced in the Ir, that it is a non-magnetic material.