In-plane rotation of magnetic stripe domains inFe1−xGaxthin films

Abstract

The in-plane rotation of magnetic stripe domains in a 65 nm magnetostrictive Fe0.8Ga0.2 epitaxial film was investigated combining magnetic force microscopy, vibration sample magnetometry, and x-ray resonant magnetic scattering measurements. We analyzed the behavior of the stripe pattern under the application of a bias magnetic field along the in-plane direction perpendicular to the stripes axis, and made a comparison with the analogous behavior at remanence. The experimental results have been explained by means of micromagnetic simulations, supported by energy balance considerations. Fields smaller than ∼ 400 Oe do not induce any stripe rotation; rather, a deformation of the closure domains pattern was evidenced. Larger fields produce a sudden rotation of the stripe structure.

Achievement of Diverse Domain Structures in Soft Magnetic Thin Film through Adjusting Intrinsic Magnetocrystalline Anisotropy

“…When x  = 8.9, the sample exhibits quite different properties. The magnetization process appears to be a transcritical hysteresis loop, which is a strong signature of the formation of stripe domain structures [8, 9, 14]. It is speculated that the perpendicular magnetic anisotropy originating from positive of the CoIr alloy supports the formation of stripe domain structures.…”

“…This feature leads to an additional noise signal during information reading. In the film which needs a rotatable anisotropy, the formation of a stripe domain structure is necessary [8, 9]. For a uniform soft magnetic single layer with in-plane isotropy, the domain structure is determined by competition of the exchange energy, magnetostatic energy, and magnetic anisotropy energies which are composed of magnetocrystalline anisotropy energy and stress-induced anisotropy energy.…”

Influence of the sputtering flow regime on the structural properties and magnetic behavior of Fe-Ga thin films (Ga ∼ 30 at.%)

“…Thus, the features of this sample can be a combination of the existence of both a more prominent presence of a disordered A2 phase with respect to the ordered D0 3 /B2 phases and of orthorhombic Ga clusters. A number of papers studied Fe-Ga thin films [6,[11][12][13][14][15][16][17][32][33][34] and, more specifically, deposition by sputtering [11][12][13][14][15][16][17], although few papers explore thin films with the composition range studied in this paper [6,11,35]. The paper by Dunlap et al [11], in which they studied sputtered Fe-Ga alloys with a (110) texture, is the most similar to the current case.…”

Tuning high frequency magnetic properties and damping of FeGa, FeGaN and FeGaB thin films

“…12,[15][16][17] Among those results, Zhan et al systematically studied the influence of strain on the static magnetic properties of FeGa films grown on the flexible substrates, 12,18,19 and the recent result indicates that FeGa alloys show a potential application in high frequency flexible microwave device. 17 However, the soft magnetic properties of FeGa films are not satisfied enough due to the relatively high conductivity and large stress of FeGa film, 13,20,21 and FeGa films also show the very high coercivity and large damping factor. 17 These properties of FeGa films are disadvantageous for the high frequency applications.…”

“…[8][9][10] Recently, investigations on the magnetic properties of magnetostrictive FeGa thin films have received much attention, [11][12][13][14] and FeGa films exhibit a fantastic potential in fabricating the more efficient, faster and smaller high-frequency devices for the applications of information and communication technologies. 12,[15][16][17] Among those results, Zhan et al systematically studied the influence of strain on the static magnetic properties of FeGa films grown on the flexible substrates, 12,18,19 and the recent result indicates that FeGa alloys show a potential application in high frequency flexible microwave device.…”