Study of magnetic nanowires of amorphous Co20Fe60B20 prepared by oblique angle deposition on nanorippled substrate

Morphology induced large magnetic anisotropy in obliquely grown nanostructured thin film on nanopatterned substrate

“…This magnetostatic coupling between two dipoles, therefore, causes the pair to have a uniaxial anisotropy with an easy axis along the line joining the dipoles and reduces the effective uniaxial anisotropy field. It has been shown that with the decrease in the separation of the ripples, the anisotropy strength decreases along the axis of the ripple [71][72][73]. In the present case, since the ripple structure in the OAD 90 • sample has large porosity and separation due to the substantial masking effect, the weak dipolar interaction among them would result in a significant increase in the shape anisotropy as compared to that of other samples.…”

Controlled evolution of three-dimensional magnetic states in strongly coupled cylindrical nanowire pairs

“…We used micromagnetic parameters matching those typically obtained for FEBID cobalt [41]: saturation magnetisation, M s = 900 × 10 3 A m −1 (typically lower than the bulk); exchange stiffness, A = 10 −11 J m −1 , and zero magnetocrystalline anisotropy due to the nanocrystalline or amorphous nature of the material deposited in this manner [31,43]. The geometry and material properties used here are also representative of common electrodeposited materials [41,[45][46][47]. Here, we simulate fully uniform structures, in terms of both material and geometry, as is expected for FEBID cobalt structures [35,43].…”

Numerical study of structural and magnetic properties of thin films obliquely deposited on rippled substrates

“…A variety of methods have been suggested and successfully used to prepare nanopatterned magnetic structures. Lately, ion beam erosion processes have become widely used for the modification of substrate topography [1,6,7,9,[15][16][17][18][19][20]. For certain irradiation conditions, such as ion incidence angle and ion energy, a nanoripple pattern can be created on the substrate, which on a local scale can be approximated by a sinusoidal surface, with the typical wavelengths of 20-400 nm and amplitudes of 1.5-60 nm [6,9].…”

“…Thin magnetic films grown on such substrates partially replicate their pattern, which results in the modification of the films' magnetic properties, most notably, their magnetic anisotropy [7]. Moreover, if magnetic material is deposited obliquely on a rippled substrate, inclined nanocolumnar structures can form on 'windward' slopes of the ripple due to the shadowing effect [17,20]. This results in a more complex magnetic behavior of the samples but, on the other hand, expands our ability to adjust the properties of the films.…”