TY - JOUR
T1 - Morphological change in FePt nanogranular thin films induced by swift heavy ion irradiation
AU - Shirai, M.
AU - Tsumori, K.
AU - Kutsuwada, M.
AU - Yasuda, K.
AU - Matsumura, S.
PY - 2009/5/15
Y1 - 2009/5/15
N2 - We have investigated morphology change of FePt nanogranular films (FePt)47(Al2O3)53 under irradiation with 210 MeV Xe ions. Here, electron tomography technique was extensively employed to clarify three-dimensional (3D) structure in irradiated specimens, in addition to conventional transmission electron microscopy (TEM) techniques such as bright-field observation and scanning TEM energy dispersive X-ray spectroscopy (STEM-EDX) analysis. The ion irradiation induces the coarsening of FePt nanoparticles with elongation along the beam direction. Electron tomography 3D reconstructed images clearly demonstrated that when the fluence achieves 5.0 × 1014 ions/cm2, well-coarsened FePt balls have been formed on the irradiated surface, and the particles in the film interior have been deformed into rods along the ion trajectory. The alloy particles become inhomogeneous in composition after prolonged irradiation up to 1.0 × 1015 Xe ions/cm2. The particle center is enriched with Pt, while Fe is slightly redistributed to the periphery.
AB - We have investigated morphology change of FePt nanogranular films (FePt)47(Al2O3)53 under irradiation with 210 MeV Xe ions. Here, electron tomography technique was extensively employed to clarify three-dimensional (3D) structure in irradiated specimens, in addition to conventional transmission electron microscopy (TEM) techniques such as bright-field observation and scanning TEM energy dispersive X-ray spectroscopy (STEM-EDX) analysis. The ion irradiation induces the coarsening of FePt nanoparticles with elongation along the beam direction. Electron tomography 3D reconstructed images clearly demonstrated that when the fluence achieves 5.0 × 1014 ions/cm2, well-coarsened FePt balls have been formed on the irradiated surface, and the particles in the film interior have been deformed into rods along the ion trajectory. The alloy particles become inhomogeneous in composition after prolonged irradiation up to 1.0 × 1015 Xe ions/cm2. The particle center is enriched with Pt, while Fe is slightly redistributed to the periphery.
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U2 - 10.1016/j.nimb.2009.03.079
DO - 10.1016/j.nimb.2009.03.079
M3 - Article
AN - SCOPUS:65449118839
VL - 267
SP - 1787
EP - 1791
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
IS - 10
ER -