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

Journal Article · Mon May 06 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4804363· OSTI ID:22162896

Yoshida, Yutaka ^[1]; Oosawa, Kazuya ^[2]; Watanabe, Seiichi ^[1]; Kaiju, Hideo ^[3]; Kondo, Kenji; Ishibashi, Akira ^[3]; Yoshimi, Kyosuke ^[4]

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1. Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Kita-8, Nishi-13, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan)
2. Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University, Kita-8, Nishi-13, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan)
3. Laboratory of Nano-Structure Physics, Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido 001-0020 (Japan)
4. Graduate School of Engineering, Tohoku University, Sendai, 6-6-02 Aramaki Aza Aoba, Miyagi 980-8579 (Japan)

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.

• OSTI ID: 22162896
• Journal Information: Applied Physics Letters, Vol. 102, Issue 18; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM ALLOYS
BCC LATTICES
FERROMAGNETIC MATERIALS
IRON ALLOYS
KERR EFFECT
LASER RADIATION
MAGNETIC PROPERTIES
MAGNETO-OPTICAL EFFECTS
NANOSTRUCTURES
PARAMAGNETISM
PHASE TRANSFORMATIONS
POLYCRYSTALS
SOLIDS
SURFACES
TRANSFORMATIONS
WAVELENGTHS