Mössbauer-effect studies of multilayers and interfaces

Chemical mixing at “Al on Fe” and “Fe on Al” interfaces

“…In M€ ossbauer spectroscopy, the top and the bottom interface of a Fe layer has generally been distinguished by the 57 Fe marker method, 5,14,15 in which case the position of a thin 57 Fe layer (the M€ ossbauer isotope) is varied across the natural Fe layer. The application of this method is limited by the possible mixing and diffusion between the 57 Fe marker and the natural Fe layers, and in case of an extended interface, the quantitative conclusion is difficult.…”

Determination of the Direction of the c-Axis of L10FePt Thin Films with the MÖssbauer Spectroscopy

“…The spectra in Fig. 1 could be fitted consistently with a Voight-based distribution model [12] of which the mean hyperfine field of 27.2 T matches well with the literature [11]. A Gaussian distribution width σ of 1.2 T is found.…”

“…Here, we use the technique to investigate the direction of the c-axis of FePt L1 0 to gain more insight in the crystal growth of FePt L1 0 on MgO(110). For FePt the magnetic moments, and thus the magnetic hyperfine field B hf , are parallel aligned with the c-axis of the tetragonal L1 0 crystal structure [11,3]. The angle θ between the incident gamma-radiation and B hf influences the relative intensities of the lines of a CEMS spectrum.…”

“…Conversion electron Mössbauer spectroscopy (CEMS) has, due to its high sensitivity to the atomic and electronic surroundings of the Mössbauer isotope 57 Fe, successfully been utilized in the study of ultrathin films [10,11]. Here, we use the technique to investigate the direction of the c-axis of FePt L1 0 to gain more insight in the crystal growth of FePt L1 0 on MgO(110).…”

Influence of isochronal annealing on the microstructure and magnetic properties of Cu-free HITPERM Fe40.5Co40.5Nb7B12 alloy

“…Thus, upon annealing, magnetic moments are changing their orientation from in-plane to out-of-plane to random. 38 It may be noted that studied alloy exhibit strong perpendicular magnetic anisotropy in the annealing temperature range of 723 K-923 K (first transformation stage). In the mentioned temperature range, the alloy has peculiar two phase microstructure consisting of FeCo nano-crystals and the remaining amorphous phase, as otherwise, spins are oriented either in-plane or random.…”