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- W2067874665 abstract "Calculations of the coefficient of ${q}^{2}$ in the expression for the energy $ensuremath{epsilon}$ of a long-wavelength spin wave have been performed for a model of a ferromagnetic metal with short-range particle interactions in the low-density limit. A single $s$-like energy band of tight-binding form is considered in a face-centered cubic crystal. First- and second-neighbor interaction integrals are included in $ensuremath{epsilon}(mathrm{k})$ as arbitrary parameters. In contrast to previous work, the effective electron interaction which enters the spin-wave calculation is not the bare potential, but is closely related to the two-particle $t$ matrix. It is found to be possible to satisfy the spin-wave stability criterion for the ferromagnetic state as well as the $t$-matrix criterion for the occurrence of ferromagnetism at reasonably low particle densities for a wide range of values of the band parameters, and for interaction strengths of the order of the bandwidth." @default.
- W2067874665 created "2016-06-24" @default.
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- W2067874665 date "1968-06-10" @default.
- W2067874665 modified "2023-09-27" @default.
- W2067874665 title "Spin Waves in a Model Ferromagnetic Metal" @default.
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- W2067874665 doi "https://doi.org/10.1103/physrev.170.576" @default.
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