Temperature dependence of the magnetization for GdCo12-xFexB6 compounds.
Isothermal magnetization curves recorded at 4 K in a static field up to 10 T for GdCo12-xFexB6 compounds.
Magnetization curves recorded using pulsed field at 4 K for GdCo12-xFexB6 compounds (a) and composition dependence of the critical field determined from the 4 K magnetization curves of GdCo12-xFexB6 compounds (b).
Comparison of magnetization curves recorded at the indicated temperature for GdCo11.5Fe0.5B6 (a) and magnetic phase diagram of GdCo11FeB6 as determined from the evolution of the critical field μ0H1 obtained in the magnetization curves. The full symbols are derived from steady field and the empty symbols from high pulsed magnetic field (b).
Intersublattice Gd-3d exchange parameter determined at the indicated temperature for GdCo11.5Fe0.5B6 and GdCo12B6.
Composition evolution of the Gd-3d exchange integral in GdCo12-xFexB6 compounds in the range x = 0–3 at 4 K.
Lattice parameters, compensation and Curie temperatures, spontaneous magnetization, and average magnetic moment per transition metal (Co,Fe) atom for GdCo12-xFexB6 compounds.
Critical magnetic field μ0H1, macroscopic intersublattice coupling constant n Gd-3d, and exchange interaction integral J Gd-3d as determined from the slope of the linear part of M(μ0H) curves and J* Gd-3d as obtained from the μ0H1 value for GdCo12-xFexB6 compounds; see text for more details.
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