Intrinsic magnetic properties ofRFe10Mo2compounds (R=Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, or Tm)

A systematic investigation of the intrinsic magnetic properties of R${\mathrm{Fe}}_{10}$ ${\mathrm{Mo}}_2$ compounds (with R=Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, and Tm) has been performed by means of ac susceptibility measurements, singular-point-detection techniques, and magnetization measurements. Spin reorientations were detected by measuring the temperature dependence of the ac susceptibility and the magnetization in ${\mathrm{NdFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{T}}_{\mathrm{sr}}$=147 K), ${\mathrm{DyFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{T}}_{\mathrm{sr}}$=137 K), ${\mathrm{ErFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{T}}_{\mathrm{sr}}$=180 K), and ${\mathrm{TmFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{T}}_{\mathrm{sr}}$=166 K). In order to trace field-induced magnetic phase transitions, magnetization curves were measured at 4.2 K on magnetically-aligned R${\mathrm{Fe}}_{10}$ ${\mathrm{Mo}}_2$ samples in magnetic fields up to 35 T in the Amsterdam high field installation. First-order magnetization processes (FOMP)-like transitions were detected at 4.2 K in ${\mathrm{PrFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{B}}_{\mathrm{cr}}$=5.97 T) and ${\mathrm{HoFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{B}}_{\mathrm{cr}}$=1.73 T) in an external field applied perpendicular to the alignment direction and in ${\mathrm{ErFe}}_{10}$ ${\mathrm{Mo}}_2$ (${\mathit{B}}_{\mathrm{cr}}$=2.47 T) in an external field applied parallel to the alignment direction.