B 22 Bannikov, V. V. Double Exchange in Cubic Crystals with Pairs of Exchange-Coupled Mixed-Valence 3d3 –3d4 Ions / V. V. Bannikov, V. Ya. Mitrofanov // Physics of the Solid State. - 2005. - Vol. 47, № 8. - P1532-1534 : il. - Bibliogr. : p. 1534 (6 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): НЕСТЕХИОМЕТРИЯ -- 3-D ИОНЫ -- KZnF3 Аннотация: Specifics of the exchange interaction in mixed-valence Cr2+–Cr3+ 3d-ion pairs in KZnF3 crystals are studied. It is shown that the double-exchange interaction can be significantly reduced by the low-symmetry crystal field created by a compensator. The features of the exchange interaction and optical absorption spectra are qualitatively analyzed Полный текст |