""Spin selectivity in angle-resolved Auger photoelectron coincidence spectroscopy (AR-APECS) is used to. probe electronic structure in antiferromagnetic thin films. In particular, exploiting the AR-APECS capability to. discriminate Auger electron emission events characterized by a different spin of the ion in its final state, a sharp. multiplet structure in the Ni MVV Auger line shape of NiO\\\/Ag(001) thin films is measured below the critical. Néel temperature. The assignment of multiplet terms follows from a close comparison of the experimental. AR-APECS line shapes with the predictions based on semiempirical calculations on a cluster model and an. open-band extension of the Cini-Sawatzky approach. In analogy to CoO, also in NiO, above the Néel temperature. a more featureless Auger spectrum appears and AR-APECS does not disentangle anymore high-spin and low-spin. contributions to the total Auger intensity. Such a behavior, which seems to be a general result for metal oxide. antiferromagnetic systems, is discussed.""
Gotter, R., Sbroscia, M., Caminale, M., VAIDYA S., R., Perfetto, E., Moroni, R., et al. (2013). Monitoring antiferromagnetism via angle-resolved Auger photoelectron coincidence spectroscopy:The case of NiO/Ag(001). PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 88(9), 094403-1-094403-7 [10.1103/PHYSrevB.88.094403].
Monitoring antiferromagnetism via angle-resolved Auger photoelectron coincidence spectroscopy:The case of NiO/Ag(001)
DI FILIPPO, GIANLUCA;OFFI, FRANCESCO;RUOCCO, Alessandro;STEFANI, Giovanni;
2013-01-01
Abstract
""Spin selectivity in angle-resolved Auger photoelectron coincidence spectroscopy (AR-APECS) is used to. probe electronic structure in antiferromagnetic thin films. In particular, exploiting the AR-APECS capability to. discriminate Auger electron emission events characterized by a different spin of the ion in its final state, a sharp. multiplet structure in the Ni MVV Auger line shape of NiO\\\/Ag(001) thin films is measured below the critical. Néel temperature. The assignment of multiplet terms follows from a close comparison of the experimental. AR-APECS line shapes with the predictions based on semiempirical calculations on a cluster model and an. open-band extension of the Cini-Sawatzky approach. In analogy to CoO, also in NiO, above the Néel temperature. a more featureless Auger spectrum appears and AR-APECS does not disentangle anymore high-spin and low-spin. contributions to the total Auger intensity. Such a behavior, which seems to be a general result for metal oxide. antiferromagnetic systems, is discussed.""I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
