Nanocrystalline α-Fe Layer Examined by Mössbauer Spectrometry

B. Davida, O. Schneeweissa, N. Pizúrováa, A. Rekb, V. Kudrlec, O. Jašekc,d aCEITEC IPM, Institute of Physics of Materials, ASCR, v.v.i., Žižkova 22, CZ 61662 Brno, Czech Republic bInstitute of Scientific Instruments, ASCR, v.v.i., Královopolská 147, CZ 61264 Brno, Czech Republic cDPE, Faculty of Science, Masaryk University, Kotlářská 2, CZ 61137 Brno, Czech Republic dCEITEC MU, Masaryk University, Kamenice 753/5, CZ 62500 Brno, Czech Republic

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A few micrometers thick nanocrystalline α-Fe layer with the mean crystallite size dXRD=14 nm was deposited in low-pressure microwave plasma, using Fe(CO)5 vapour. Its nanocrystalline character was proved on its surface under SEM (surface was formed of deposited nanoparticles) and in its volume using TEM (deposited nanoparticles were stacked up, creating columns). No significant iron oxide phases were observed in the transmission 57Fe Mössbauer spectrum measured at 5 K nor in the surface-sensitive 57Fe conversion: electron Mössbauer spectrum measured at 293 K.

DOI: 10.12693/APhysPolA.126.94 PACS numbers: 52.75.Hn, 73.63.Bd, 76.80.Pj