Efeito Seebeck de spin e efeito Nernst anômalo em nanoestruturas compostas por Co2FeAl

Abstract

In the spintronics field, the spin caloritronics is an active and exciting research of area with potential to the development of energy-efficient technologies, covering the impacts of temperature gradient on the production of spin and charge currents in materials. In this scenario, the spin caloritronics arise as a area exciting to production of high-performance efficient devices. Focused in this perspective, we explore the possibility of modulate a thermoeletric effect through magnetic anisotropy induction. In special, we investigate the Longitudial spin Seebeck effect (LSSE) with anomalous Nernst effect (ANE) in bilayers of Co2FeAl (CFA)/Tungsten (W) grown onto GaAs (100) substrate oriented. The manipulation of anisotropies is perform through of simultaneous induction of uniaxial and cubic anisotropy during the deposition process. Moreover, we investigate the structural, quasistatic magnetic and thermoeletric properties of Co2FeAl deposited onto glass and Kapton substrate. Thus, we explore the possibility of modulate the anomalous Nernst effect through magnetic uniaxial anisotropy induction. In this context, we simulate the magnetic behavior of two system without and with uniaxial anisotropy dispersion and the thermoeletric response for both system. In a general point of view, the comparison between the theoretical approach and experimental results show the Co2FeAl as a promising candidate for active elements in spintronic devices.