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Gas Phase Interstitial Modification Of Rare-Earth Intermetallics, J.M.D. Coey, Ralph Skomski, S. Wirth
Gas Phase Interstitial Modification Of Rare-Earth Intermetallics, J.M.D. Coey, Ralph Skomski, S. Wirth
Ralph Skomski Publications
The gar phase interstitial modification of rare-earth intermetallics is studied. Net reaction energies for nitrogen in Sm2Fe17 and Nd(Fe11T1) are U0 = - 57 kJ/mole and U0 = - 51 kJ/mole, respectively. The equilibrium nitrogen concentration is calculated as function of temperature and gas pressure using a simple lattice gas model. For nitrogen in Sm2Fe17, refined diffusion parameters D0 (N) = 1.02 mm2/r and Ea(N) = 133 kJ/mole, determined by thermopiezic analysis of the initial stage of nitrogen absorption, are used to calculate nitrogen profiles and …
Magnetization And 57Fe Hyperfine Fields In Y2Fe17Z3- Δ (Z=H, C, Or N) Interstitial Compounds, Qi-Nian Qi, Hong Sun, Ralph Skomski, J.M.D. Coey
Magnetization And 57Fe Hyperfine Fields In Y2Fe17Z3- Δ (Z=H, C, Or N) Interstitial Compounds, Qi-Nian Qi, Hong Sun, Ralph Skomski, J.M.D. Coey
Ralph Skomski Publications
Measured magnetization and 57Fe hyperfine fields at T∼0 K for Y2Fe17 and Y2Fe17Z3- δ , with Z=H, C, or N and δ∼0.5, are analyzed to determine the influence of the interstitial atoms on the 3d magnetism. All are weak ferromagnets with a nearly-full 3d subband, although when Z=N, the magnetic moment of 38.1μB is very close to the fully saturated value of 39.4μB. On a local scale, the order of hyperfine fields Bhf4f (=35 T)> Bhf6g (=33 T)> Bhf12j …