Pressure-induced valence changes as origin of magnetism loss in Ce2Pd2In

The proposed experiment aims to investigate the pressure-evolution of cerium valence in Ce2Pd2In intermetallic compound. Application of pressure was found to result in suppression of long-range magnetic order at pc ≈ 4 GPa accompanied by the Kondo anomaly formation. Pressure was found to result in formation of Ce-atomic arrangement strongly supporting geometrical frustration as one of mechanisms potentially responsible for suppression of magnetism. However, eventual cerium 4f1 valence instability, often accompanied by development of the Kondo screening effect, cannot be neglected. XAS is a unique tool enabling to discriminate the valence state of the magnetic Ce atoms because of the drastic differences of spectral features between Ce 4f1-4f0. High-pressure XAS measurements will therefore provide an important insight into the underlying physics at the microscale and thus will permit to complete the picture of the pressure-driven development of Ce2Pd2In magnetism.