2024-03-29T12:51:41Z
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2023-01-16T04:07:28Z
320:321:322
SYNCHROTRON RADIATION PHOTOELECTRON STUDY OF HEUSLER-TYPE Fe2VAL-BASED ALLOYS
SODA, KAZUO
54365
MIYAZAKI, HIDETOSHI
54366
YAMAMOTO, KOJI
54367
MOCHIZUKI, TAKAHIRO
54368
INUKAI, MANABU
54369
KATO, MASAHIKO
54370
YAGI, SHINYA
54371
NISHINO, YOICHI
54372
The electronic structures of Heusler-type Fe2VAl-based alloys, n-type thermoelectric alloys Fe2VAl1-zXz(X = Si, Ge) and p-type one Fe2(V1-yTiy)Al, have been investigated by photoelectron spectroscopy with use of synchrotron radiation as an excitation photon source. Observed valence-band spectra of Fe2VAl agree quite well with the predicted density of states with a sharp pseudogap across the Fermi energy EF. Small substitution in Fe2VAl1-zXz and Fe2(V1-yTiy)Al reveals a rigid-band-like energy shift of the valence band, although the observed shift is smaller than expected in the rigid band model. Further substitution causes the modification of the electronic structure near EF and the appearance of mid-pseudogap states. However, the dependence of the thermoelectric properties of these alloys on substitution can be qualitatively explained by the observed change in the electronic structure near EF.
journal article
World Scientific Publishing
2008-12
application/pdf
Advances in Synchrotron Radiation
2
1
235
243
http://dx.doi.org/10.1142/S1793617908000148
http://hdl.handle.net/2237/20772
1793-6179
https://nagoya.repo.nii.ac.jp/record/18677/files/ICMAT2007PaperSodaRevised.pdf
eng
https://doi.org/10.1142/S1793617908000148
Electronic version of an article published as [Advances in Synchrotron Radiation. v.1, n.2, 2008, p.235-243] [10.1142/S1793617908000148] © [copyright 2008 World Scientific Publishing Company] [http://www.worldscientific.com/worldscinet/asr]