Suchergebnisse
Suchergebnisse:
Die Kanamori- Goodenough -Regeln beschreiben, ob durch die Superaustauschwechselwirkung eine ferro- oder eine antiferromagnetische Kopplung zu erwarten ist. Dies hängt ab vom Winkel zwischen den Bindungen der beiden Metall-Kationen. Die Regeln wurden von Philip Warren Anderson auf folgende Punkte vereinfacht [3] :
15. Dez. 2011 · The Goodenough-Kanamori rule, first formulated by Goodenough in 1955 (Goodenough 1955; Goodenough 1958) and subsequently provided more rigorous mathematical underpinning by Kanamori (1959), applies to interatomic spin-spin interactions between two atoms, each carrying a net spin, that are mediated by virtual electron transfers ...
schreiben die drei Goodenough-Kanamori-Anderson (GKA)-Regeln: (1) Der 180°-Austausch zwischen gefüllten oder leeren Orbitalen ist stark und antiferromagnetisch. (2) Der 180°-Aus-tausch zwischen einem gefüllten und einem leeren Orbital ist schwach und ferromagnetisch. (3)
dagegen A-Typ-Ordnung (lagenartig). Der Grund liegt in der orbitalen Ordnung und den Goodenough-Anderson-Kanamori-Regeln. Die orbitale Ordnung entsteht aufgrund des kooperativen Jahn-Teller-Effekts. Zwischen den Ebenen sind jeweils zwei gleiche Orbitale benachbart. Für sie gilt der ganz
A set of semi-empirical rules were developed by John B. Goodenough and Junjiro Kanamori [ ja] in the 1950s. [3] [4] [5] These rules, now referred to as the Goodenough–Kanamori rules, have proven highly successful in rationalizing the magnetic properties of a wide range of materials on a qualitative level.
4. Nov. 2022 · These rules have been shown to validate the results of Anderson's rigorous mathematical SE theory and are now popularized by the names of its principles as the Goodenough–Kanamori–Anderson rules. The chapter considers fundamental origins of magnetic anisotropy in ferrites and posit ways to engineer this anisotropy from the spin ...
These rules have been shown to validate the results of Anderson's rigorous mathematical SE theory and are now popularized by the names of its principles as the Goodenough–Kanamori–Anderson rules. The chapter considers fundamental origins of magnetic anisotropy in ferrites and posit ways to engineer this anisotropy from the spin Hamiltonian ...
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