Mesoscopic bound on anisotropy in itinerant ferromagnets

Abstract

We calculate the anisotropy energy of a single-domain ferromagnetic particle in which the only source of anisotropy is the presence of non-magnetic impurities. We find that such anisotropy takes the form of combined easy-axis and easy-plane anisotropies, with random orientations of the axes. Typically the anisotropy energy is of order $N^{1/2}\hslash /ta{u}_{so}$, where $N$ is the number of electrons in the ferromagnetic particle and ${\tau }_{so}$ is the spin-orbit time.

4 Pages, 1 figure

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Cited by in corpus (5)

• Mesoscopic anisotropic magnetoconductance fluctuations in ferromagnets
• Electron-magnon coupling and nonlinear tunneling transport in magnetic nanoparticles
• Anisotropy in Ferromagnetic Nanoparticles: Level-to-Level Fluctuations of a Collective Effect
• Spin fluctuations in quantum dots
• Tunneling density of states in quantum dots with anisotropic exchange