Thin film Curie temperature

The orderedisorder phase transition in thin films at finite temperature and zero temperature (quantum phase transition) is discussed within the transverse Ising model using molecular field approximation.

5p viberbers 09-08-2023 7 3   Download

Magnetite (Fe3O4) is a potential material for spintronic development due to its high Curie temperature (858 K) and half-metallic structure with only one spin polarization at Fermi level. The bulk properties of Fe3O4 make it a big challenge to grow perfectly stoichiometric thin films at a low temperature.

5p viharry 14-12-2022 8 2   Download

The Gaussian spin fluctuation theory is applied to study magnetic properties (Curie temperature, magnetization) of EuO ultra-thin films within nearest neighbor and next nearest neighbor exchange approximation. The dependence of Curie temperature on the thickness of the free EuO ultrathin film is calculated and compared with the results of the other mean field methodconstant coupling approximation. The effect of nearly independence of saturation magnetization on the EuO films thickness measured in [8] can be explained by controlling the next nearest neighbor exchange in presence of substrates.

6p thuyliebe 12-10-2018 22 2   Download