A Model for Ferromagnetic Nanograins with Discrete Electronic States

Details A Model for Ferromagnetic Nanograins with Discrete Electronic States A Model for Ferromagnetic Nanograins with Discrete Electronic States

2001-03-30

arxiv.org/abs/cond-mat/0103626v1

Phys.Rev.B 64, 220401(R) (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.64.220401

We propose a simple phenomenological model for an ultrasmall ferromagnetic grain, formulated in terms of the grain's discrete energy levels. We compare the model's predictions with recent measurements of the discrete tunneling spectrum through such a grain. The model can qualitatively account for the observed features if we assume (i) that the anisotropy energy varies among different eigenstates of one grain, and (ii) that nonequilibrium spin accumulation occurs.

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