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Ni1−xCoxCr2O4 solid solution samples with х=0, 0.005, 0.01, 0.02, 0.3, 0.5, 0.8 and 1 are studied by the methods of X-ray diffraction and X-ray photoelectron spectroscopy (XPS). Ni2p3/2,1/2, Co2p3/2,1/2, Cr2p3/2,1/2, and O1s spectra are measured. The spectra are calculated with allowance for multiplet splitting, crystal field, and charge-transfer effect. Ni2+ ions are found to be present in tetrahedral...
Single crystals of La 1−x Bi x Mn α O 3±β and La 1−x−y Bi x A y Mn α O 3±β (A=Ba, Pb) are grown, their crystal and electron structure is studied. Relative Mn 3+ /Mn 4+ abundance in each single crystal is determined via fitting experimental Mn2p-spectra with weighted superposition of theoretical spectra of tri-...
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