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Characterization of binary Ce-Ir alloy photocathodes

Authors :
Satoh, Daisuke
Shibuya, Tatsunori
Ogawa, Hiroshi
Tanaka, Masahito
Ikeura, Hiromi
Kuroda, Ryunosuke
Yoshida, Mitsuhiro
Sugawara, Hitoshi
Toyokawa, Hiroyuki
Source :
Japanese Journal of Applied Physics; January 2019, Vol. 58 Issue: 1 pSIIB10-SIIB10, 1p
Publication Year :
2019

Abstract

Binary Ce-Ir alloys nominally containing 83, 78, 75, and 67 at% Ir were grown via arc melting in order to clarify the optimum composition for a Ce-Ir system to be used as photocathode material. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) analysis were employed to characterize the microstructure and phase composition of these alloys. The results of the XRD analyses and SEM/EDX measurements indicated that single-phase homogeneous crystals composed of CeIr2 grains were successfully grown in the sample with an iridium content amounting to 67 at%. Through quantum efficiency (QE) measurements, it was revealed that the QE of the Ce-67 at% Ir alloy (CeIr2 phase) is a few times higher than that of the other Ce-Ir alloys.

Details

Language :
English
ISSN :
00214922 and 13474065
Volume :
58
Issue :
1
Database :
Supplemental Index
Journal :
Japanese Journal of Applied Physics
Publication Type :
Periodical
Accession number :
ejs50384918