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- W1967677697 abstract "Using paramagnetic resonance it is shown that a photochromic center in SrTiO3 is Fe5+ (3d3). Its resonance parameters are g = 2.0131 ±0.0008, A(57Fe) = (8.6 ± 0.1) x 10−4cm−1. As a function of valency the positive g-shift of Fe5+ lies nearly on a straight line joining those of the isoelectronic Cr3+ and Mn4+. The hyperfine fields of V2+, Cr3+, Mn4+ and Fe5+ are close to one another (Geschwind's rule). Simultaneous observation of Fe3+ and Fe4+ proves indirectly the existence of Fe3+ which can act as a hole trap. Mittels paramagnetischer Resonanz wird gezeigt, dass ein photochromisches Zentrum in SrTiO3 Fe5+(3d3) ist. Seine Resonanz-Parameter sind g = 2,0131 ± 0,0008, A(57Fe) = (8,6 ± 0,1 x 10−4 cm−1. Als Funktion der Valenz liegt die positive g-Verschiebung des Fe5+ nahezu auf einer geraden Linie, welche die Werte der isoelektronischen Cr 3+ und Mn4+ miteinander verbindet. Die Hyperfeinfelder von V2+, Cr3+, Mn4+ and Fe5+ sind nahezu gleich (Geschwind'sche Regel). Die gleichzeitige Beobachtung von Fe5+ und Fe3+ beweist indirekt die Existenz von Fe4+, das als Defektelektronenfalle wirken kann." @default.
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- W1967677697 date "1971-07-01" @default.
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- W1967677697 title "Photochromic Fe5+ (3d3) in SrTiO3 evidence from paramagnetic resonance" @default.
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- W1967677697 doi "https://doi.org/10.1016/0038-1098(71)90470-4" @default.
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