Magnetic properties on the surface of FeAl stripes induced by nanosecond pulsed laser irradiation

Abstract

We demonstrate the formation of magnetic nanostripes on the surface of Fe52Al48 induced by nanosecond pulsed laser irradiation and investigate their magnetic properties. The magnetic stripe consists of a disordered A2 phase of Fe-Al alloys with Al-oxide along the [110] direction on the (111)-oriented plane. According to the focused magneto-optical Kerr effect measurement, the coercive force of the magnetic stripe obeys the 1/cos theta law, where theta is the field rotation angle estimated from the stripe direction. Also, the jump field can be observed in the magnetic hysteresis loop. These results indicate that the magnetization reversal in the magnetic stripe originates from the domain pinning, showing that the magnetization rotates incoherently

Wavelength-dependent magnetic transitions of self-organized iron–aluminum stripes induced by pulsed laser irradiation

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] In recent years, such quantum beams have attracted considerable attention for the fabrication of magnetic structures. [16][17][18][19][20][21][22][23] For example, magnetic properties of CoPt multilayers have been controlled by ion irradiation through a lithographically-made resist mask, producing magnetic arrays of 1-lm-wide lines.…”

“…Interestingly, these nanostructures exhibit a paramagnetic to ferromagnetic phase transition, and the enhancement of the coercive force has been observed. 13,14 In this study, we investigate the laser wavelength dependence of structural and magnetic properties on the surface of an FeAl alloy induced by nanosecond pulsed laser irradiation.…”