Phenomenon of low-dimensional magnetism in C$K\alpha$, N$K\alpha$, and O$K\alpha$ spectra of carbonates and nitrates obtained by the electron probe microanalysis (EPMA)

Primary C$K\alpha$, N$K\alpha$, and O$K\alpha$ spectra are recorded in single crystals of carbonates, nitrites, and nitrates by the electron probe microanalysis (EPMA). The shift and width of the $K\alpha$ lines are used for determining the patterns of variations in charge and spin densities around the emitting atom in the low-dimensional magnetics. The method has made it possible to obtain experimental knowledge about the indirect exchange interaction in the study samples of single crystals, including micron-sized ones at room temperature. The structure of resonance levels (plasmons) is identified in the nitrogen spectra in nitrates and nitrites in the conduction bands.