Change in Superparamagnetic State Induced by Swift Heavy Ion Irradiation in Nano-Maghemite
Sándor Stichleutner,
Bence Herczeg,
Jiří Pechoušek
et al.
Abstract:The effect of swift heavy ion irradiation on sol–gel-prepared maghemite nanoparticles was studied by 57Fe transmission Mössbauer spectroscopy and X-ray diffractometry (XRD). The room temperature Mössbauer spectra of the non-irradiated nano-maghemite showed poorly resolved magnetically split, typical relaxation spectra due to the superparamagnetic state of the nanoparticles. Significant changes in the line shape, indicating changes in the superparamagnetic state, were found in the Mössbauer spectra upon irradia… Show more
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