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- W2000072004 abstract "Results of x-ray powder diffraction and magnetic measurements performed on $R{mathrm{Fe}}_{11.3}{mathrm{W}}_{0.7}$ compounds, where $R=mathrm{Dy},$ Ho, Er, and Lu, are presented. The Curie temperature, saturation magnetization, and spin reorientation transitions are discussed in relation to several $R{mathrm{Fe}}_{12ensuremath{-}x}{T}_{x}$ systems, where $T=mathrm{Ta},$ Nb, Mo, Ti, and the x-substituent concentration is within a narrow range $x=0.5--1.0.$ In these systems, the dependence of the Curie temperature versus the unit cell volume, for a given R partner, suggests combined size and electronic effects produced by the T atom. The strengths of the rare-earth--iron and iron-iron exchange interactions are evaluated in the mean-field framework, and analyzed with reference to $R{mathrm{Fe}}_{12ensuremath{-}x}{T}_{x}$ compounds, with $T=mathrm{Ta},$ Re, Nb, Mo, Ti, Cr, and V. Based on (i) the phenomenological mean-field model accounting for the sublattice of conduction band electrons, (ii) Brooks' reinterpretation of Campbell's formulation of the intersublattice exchange, and (iii) Wigner-Seitz cell analysis, we explore the role played by the conduction band electrons, particularly the nd-type electrons $(n=3,$ 4, 5), on the intersublattice exchange coupling in the iron-rich $R{mathrm{Fe}}_{12ensuremath{-}x}{T}_{x}$ class of compounds. It is proposed that the variation in the conduction-electron density, by varying the T element type and concentration, leads to a modification of the $5d$ band occupancy number and consequently, of the R-Fe intersublattice exchange coupling." @default.
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- W2000072004 date "2002-03-19" @default.
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- W2000072004 title "Magnetic properties of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>R</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>11.3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>W</mml:mi></mml:mrow><mml:mrow><mml:mn>0.7</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mo>(</…" @default.
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- W2000072004 doi "https://doi.org/10.1103/physrevb.65.134419" @default.
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