Magnetic susceptibility diamagnetic, Landau

The magnetic susceptibility is also derived from the electron density. There are two contributions (19) the Pauli paramagnetism and the Landau diamagnetism. The former is given by... 

Conduction electrons in broad bands of s- and p-like character contribute to all three quantities (sp). The Landau orbital diamagnetism (L) of these electrons is frequently considered only in the free-electron approximation, and taken care of by introducing a factor of two thirds in front of jp, whilst represents only the core diamagnetism. More localized non-s-like electrons in narrow bands give temperature-dependent contributions. In addition to the spin part (d) of the susceptibility, which is noticeable at the nucleus via core polarization (and finally Fermi-contact interaction) or via dipolar interaction (dip), van Vleck type induced orbital contributions of the magnetic susceptibility lead to orbital (orb) contributions of K and l/T, and eventually also to quadrupolar contributions (Q) of l/Ti- In this chapter we will use the symbol a, (instead ofH , ) for the hyperfne coupling constant(s) (with units of Oep. or Oe/electron) in the equation... 

We [85] also investigated the evolution at ambient pressure of the magnetic susceptibility of the NiOj array in these samples the data are shown in Fig. 18 together with p(T) to locate T(. The Ln -ion contribution was obtained from LnAlOj perovskites and subtracted out. Both Landau diamagnetism and Van Vleck paramagnetism are small in magnitude compared with the measured X(T), so no correction was made for these contributions. 

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