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results. When no antimony was present on the surface, bare activated carbon and the analyte ions stuck in the matrix pores. These pores also offered higher diffusion resistance compared to the outer surface and hence, the shoulder peak is observed compared to the AIAC. Furthermore, the increase in the area of this shoulder peak with higher amount of analytes can also be explained by similar arguments. Although relative interference of the ions was reported by various researchers [ 36 ], but in most of the previous studies electrodes were calibrated by using one type of

, with negligible contribution from the B 2p states. Following the above arguments we may predict that the appearance of superconductivity in Fe x B under pressure is similar to the case of iron that undergoes a transition to superconducting phase above 30 GPa when it loses its magnetic moment [ 31 ]. It is easy to observe that the magnetic moment decreases with increasing pressure. 4 Elastic properties under pressure It is well known that elastic properties reflect interatomic interactions and are related to some fundamental physical properties, such as thermal

parameter plot ( Fig. 2a ), where the dependence flattens out for x = 0.3 and 0.4 proving that no more material is incorporated into the lattice. The last sample with Ni content x = 0.5 regains the trend but with a smaller slope which can be again explained by the appearance of the second phase. The restoration of the structural quality for x = 0.5 can be explained on the basis of the argument given already by Branford et al. [ 52 ]. The authors in question noted that the cation structural unit ( Fig. 8 therein) was built of 4 cations which stabilized the configurations