Titlebook: Dynamic Spin-Fluctuation Theory of Metallic Magnetism; Nikolai B. Melnikov,Boris I. Reser Book 2018 Springer International Publishing AG,

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Operationalisierung der WerbezieleTo go beyond the RPA in spin fluctuation theory we use the functional integral method. The method is based on the Stratonovich-Hubbard transformation, which requires a special form of the model Hamiltonian.

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Andreas Pott,Christoph Rass,Frank WolffAt low temperatures (. ≪ .), magnetization in metals follows the . law. In Chap. . this was shown theoretically using the RPA. At finite temperature, the RPA does not give good agreement with experiment, because it neglects the feedback of the spin waves on the thermal equilibrium state.

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Migrationsregime und ihre RäumeIn this chapter we study spin-correlation effects in metals at finite temperatures. We start with qualitative estimates of the correlation effects on the magnitude and relaxation time of a single-site spin.

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Sabine Hess,Bernd Kasparek,Maria SchwertlNeutron scattering is one of the main methods to study magnetic properties of metals and alloys.Firstly, neutron is an uncharged particle with spin and, secondly, slow neutrons have energies ( < 1 eV) of the same order as most of magnetic excitations. So, inelastic neutron scattering allows to analyse fluctuations of the spin-density.

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