Effect of Pt underlayer on the coercivity of FePt sputtered film

Magnetic Properties and Crystallographic Structure of Fe$_{3}$Pt Thin Films

“…This demonstrates a lower thermal stability for Fe Pt phase [3]. In thin film system, the ordering parameter is 0.59 for the Fe Pt thin films annealed at 400 C for 60 min [19]. In comparison to this paper, low (0.29) is observed in Fe Pt thin films annealed under the similar conditions, indicating sluggish progress of ordering in Fe Pt thin films.…”

Effects of annealing temperature, atomic composition, film thickness on structure and magnetic properties of CoPt composite films

“…Tensile stress occurs and is relaxed by the formation of microtwins due to the lattice mismatch between substrate and film [34]. Stress is considered to be effective to influence texture in the L1 0 -MPt (M = Co and Fe) films [3,6,22,24]. We believe that the relaxation mechanism of the stress may favor the formation of the L1 0 -CoPt.…”

“…It is worthy of note that the stress can arise from various sources such as the different coefficient of thermal expansion (CTE), the lattice mismatch between substrate and film layer, the residual stress of the as-deposited films, the volume shrinkage during phase transformation and the grain growth during the annealing process [3,[21][22][23]. Stress is not only effective to induce the texture in the L1 0 -CoPt films, but also lead to the distortion of the lattice of the films, which may have a great impact on the magnetic properties of the materials [24].…”

Effects of Ru and Ag cap layers on microstructure and magnetic properties of FePt ultrathin films

“…Several methods have been used for reducing the ordering temperature and enhancing the perpendicular magnetic anisotropy (PMA) of the L 1 0 phase FePt thin films, for example, i) introduction of an underlayer, ii) introduction of a cap layer, and iii) addition of a third element to form a ternary alloy compound. For the underlayer method, different underlayers have been investigated, such as Ag [ 4 , 5 ], Pt [ 6 ], Hf [ 7 ], Al [ 8 ], and Ti [ 9 , 10 ]. For the cap layer method, the Ag [ 11 ], Au [ 12 ], etc.…”