Nanopatterns induced by pulsed laser irradiation on the surface of an Fe-Al alloy and their magnetic properties

Yutaka Yoshida, Kazuya Oosawa, Seiichi Watanabe, Hideo Kaiju, Kenji Kondo, Akira Ishibashi, Kyosuke Yoshimi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have studied nanopatterns induced by nanosecond pulsed laser irradiation on (111) plane surfaces of a polycrystalline iron-aluminum alloy and evaluated their magnetic properties. Multiple nanosecond pulsed laser irradiation induces a wavelength-dependent surface transformation of the lattice structure from a B2-type to a supersaturated body centered cubic lattice. The selective formation of surface nanopatterns consisting of holes, stripes, polygonal networks, and dot-like nanoprotrusions can be observed. Furthermore, focused magneto-optical Kerr effect measurements reveal that the magnetic properties of the resultant nanostructured region changes from a paramagnetic to a ferromagnetic phase in accordance with the number of laser pulses.

Original languageEnglish
Article number183109
JournalApplied Physics Letters
Volume102
Issue number18
DOIs
Publication statusPublished - 2013 May 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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