In order to study the magnetic field effects on the intermediate valence of the Eu system, magnetization was measured for EuPd2Si2 and Eu(Pd0.95Pt0.05)2Si2 up to 100 T. A first-order metamagnetic transition was observed for both samples under high magnetic fields. The transition field is 93T for EuPd2Si2 at 6 K. The saturation magnetization close to 7μB indicates that this metamagnetism is a field-induced valence transition from an intermediate valence state to a divalent state of the Eu ion. Based on the interconfigurational fluctuation (ICF) model, the excitation energy to convert an Eu3+ ion into Eu2+ was estimated. Temperature dependence of the metamagnetic transition field of EuPd2Si2 was also studied.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)