Study of resonant Auger emission in Pt3Co alloy with resonant photoemission

• Published in: Current applied physics Vol. 30; pp. 14 - 19
• Main Authors: Seo, Minsik, Kang, Habin, Kim, Geonhwa, Jung, Moonjung, Bournel, Fabrice, Gallet, Jean-Jacques, Kim, Ki-jeong, Mun, Bongjin Simon
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2021; Elsevier; 한국물리학회
• Subjects: 6 eV satellite; Chemical Sciences; Condensed Matter; Electron correlation; Electron delocalization; Final state relaxation; Material chemistry; Materials Science; Physics; Radiationless resonant Raman Auger process; Resonant photoemission; Resonant-to-normal Auger transition; 물리학; Resonant photoemission; 6 eV satellite; Final state relaxation; Electron delocalization; Radiationless resonant Raman Auger process; Electron correlation; Resonant-to-normal Auger transition
• ISSN: 1567-1739; 1878-1675
• DOI: 10.1016/j.cap.2021.04.007

Valence band spectra of a polycrystalline Pt3Co alloy were measured with photon energies near Co L3 absorption edge. On the absorption edge, Co L3M4,5M4,5 Auger signals are superimposed on the valence band spectra. Prior to the absorption maximum, the Auger signals display constant binding energy corresponding to radiationless Raman Auger process. After the absorption maximum, normal Auger process occurs, showing characteristics of constant kinetic energy. The transition of Auger process in Pt3Co is carefully discussed, which is deviating to that in Co metal and other 3d transition metals. Our analysis of resonant Auger spectra confirmed the strong delocalization of Co 3d band in Pt3Co alloy. [Display omitted] •Co L3M4,5M4,5 Auger signals in valence band spectra of Pt3Co are measured with photon energies near Co L3 absorption edge.•Resonant-to-normal Auger transition in Pt3Co needs photon energy higher than that in Co metal and other 3d transition metals.•The change in the transition of Auger process is correlated to the strong delocalization of Co 3d band in Pt3Co alloy.