High-field magnetization of Ho2Fe17

The magnetization of a Ho2Fe17 single crystal has been measured along the principal crystallographic directions in pulsed magnetic fields up to 60 T. Stepwise discontinuities in the magnetization occur at 45 and 55 T along the [120] and [100] directions, respectively. The data allowed us to deduce the molecular field at the Ho site. As a cross check, the molecular field was determined as well from a magnetization measurement when the Ho2Fe17 single crystal was let rotate freely. Both values are in good agreement with each other.