Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4804363
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Funding
- Precursory Research for Embryonic Science and Technology program (PRESTO) from the Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [24560001, 24760001, 25288112] Funding Source: KAKEN
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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. (C) 2013 AIP Publishing LLC.
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