@article{oai:nitech.repo.nii.ac.jp:00005256, author = {Soda, K. and Murayama, H. and Shimba, K. and Yagi, S. and Yuhara, J. and Takeuchi, T. and Mizutani, U. and Sumi, H. and Kato, M. and Kato, H. and Nishino, Yoichi and Sekiyama, A. and Suga, S. and Matsushita, T. and Saito, Y.}, issue = {24}, journal = {PHYSICAL REVIEW B}, month = {Jun}, note = {The high-resolution soft x-ray photoelectron study of Heusler(L21)-type (Fe2 3V1 3)100-yAly (y=23.8-25.8) alloys directly confirms the correlation between their thermoelectric properties and the electronic structures near the Fermi level. It shows the rigid-band-like shift of the main 3d bands and the increase of the photoelectron intensity at the Fermi edge with the small deviation of the Al content from stoichiometry, i.e., y=25.0. This implies the existence of the pseudogap across the Fermi level in Fe2VAl. The Seebeck coefficients evaluated from the present spectroscopic data agree well with the experimental ones as well as the values estimated from a theoretical density of states in a rigid-band model, while the shift is much smaller than what is expected in the rigid-band model. The small modification of the electronic structure in the off-stoichiometric (Fe2 3V1 3)100-yAly alloys may be attributed to the lower contribution of Al to the electronic states near EF., application/pdf}, pages = {245112-1--245112-6}, title = {High-resolution soft x-ray photoelectron study of density of states and thermoelectric properties of the Heusler-type alloys (Fe2 3V1 3)100-yAly}, volume = {71}, year = {2005} }