Unquenched large orbital magnetic moment in NiO

Highly unquenched orbital moment in textured Fe-phthalocyanine thin films

J. Bartolomé,1,* F. Bartolomé,1 L. M. García,1 G. Filoti,2 T. Gredig,3 C. N. Colesniuc,4 I. K. Schuller,4 and J. C. Cezar5 1Instituto de Ciencia de Materiales de Aragón, and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain 2National Institute for Materials Physics, P.O. Box MG 7, 077125 Bucharest-Magurele, Romania 3Department of Physics and As...

Origin of Perpendicular Magnetic Anisotropy and Large Orbital Moment in Fe Atoms on MgO.

We report on the magnetic properties of individual Fe atoms deposited on MgO(100) thin films probed by x-ray magnetic circular dichroism and scanning tunneling spectroscopy. We show that the Fe atoms have strong perpendicular magnetic anisotropy with a zero-field splitting of 14.0±0.3  meV/atom. This is a factor of 10 larger than the interface anisotropy of epitaxial Fe layers on MgO and the la...

Temperature-dependent orbital-moment anisotropy in dilute magnetic oxides

Is the magnetic anisotropy proportional to the orbital moment?

How large is the "natural" magnetic moment?

The “natural” magnetic moment of a particle of spin S is generally assumed to be that given by the Belinfante conjecture and has the value g = 1/S for its gyromagnetic ratio. Thus, for the spin 1/2 electron we find the Dirac value ge = 2. However, in the standard model the charged W boson, a spin one particle, is found to have the value gW+ = 2. We show how this result comes about and argue tha...