As size change from bulk to nanoscale ,orbit moment increase or spin moment ?
In the published literature, 'Experimentally demonstrated that there is a direct correlation between oscillations of the in-plane magnetocrystalline anisotropy (MAE) and the density of states at the Fermi level due to majority Quantum Well States(QWS) of Δ5 character in ultrathin bcc Fe films. They further show that the key factor that governs the oscillations of the magnetocrystalline anisotropy (MAE) is a change of the in-plane component of the orbital magnetic moment. According to the literature, these results yield the intuitive picture that the quantization of the wave vector perpendicular to the film surface arises due to the confinement of the electron motion in out-of-plane orbitals, which in turn, results in changes of the in-plane orbital magnetic moment.'
Spin moment is a relativistic effects, which is immune from any type space confinement. But the orbital angular momentum is affected. But QWS in the vicinity of the Fermi level EF are expected to modulate the magnetocrystalline anisotropy energy (MAE) .
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