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Isotropic ferromagnet magnetized to saturation
Published in A.G. Gurevich, G.A. Melkov, and Waves, 2020
where α=e02/(ℏc)≈1/137 is the fine-structure constant. The minus sign in (1.7) shows that the magnetic moment and the angular momentum of an electron are antiparallel to each other, the value of γS being positive.
Surface Electron Transport and Magneto-Optics
Published in Grigory Tkachov, Topological Quantum Materials, 2015
It has the form of a bound current density j=c∇×M+∂tP, with magnetization M and electric polarization P given by M=−e22πchθE=−α(2π)2θE,α=e2cℏ,P=−e22πchθΒ=−α(2π)2θΒ, where α ≈ 1/137 is the fine-structure constant. The corresponding bound charge density can be written as ρ=−∇⋅P.
The Hamiltonian Approach to Electrodynamics
Published in V. L. Ginzburg, Oleg Glebov, Applications of Electrodynamics in Theoretical Physics and Astrophysics, 2017
The effects arising from the interaction of light and electrons are proportional to the “constant of electromagnetic interaction”, namely the fine-structure constant () x=e2ħc=1137036.
Electron impact ionisation cross sections of cis- and trans-diamminedichloridoplatinum(II) and its hydrolysis products
Published in Molecular Physics, 2019
Stefan E. Huber, Daniel Süß, Michael Probst, Andreas Mauracher
The cross section formula given by Equation (3) has experienced several modifications over the years and has been extended also to relativistic incident energies [35]. For the latter case the expression for the cross section reads: where denotes the fine structure constant, , , , , , and is the speed of light.