@article{oai:nagoya.repo.nii.ac.jp:00007095, author = {Yamamoto, Masahiro and Ohta, Hiromichi and Koumoto, Kunihito}, issue = {7}, journal = {APPLIED PHYSICS LETTERS}, month = {Feb}, note = {Herein the authors propose a compositional thermoelectric phase diagram, which includes the density of states effective mass (md*d) carrier relaxation time (τ), and thermoelectric power factor (S2δ, where S and δ are Seebeck coefficient and electrical conductivity) for high-quality epitaxial films composed of 20%-Nb-doped CaTiO3–SrTiO3–BaTiO3 solid solutions [(Ca,Sr,Ba) ×(Ti0.8Nb0.2)O3]. The m*d values almost proportionally increase with the in-plane lattice parameter of (Ca,Sr,Ba)(Ti0.8Nb0.2)O3 epitaxial film, while the τ values drastically decrease when Ca and/or Ba are substituted for Sr in Sr(Ti0.8Nb0.2)O3, indicating that the Sr-site substitution negatively affects the thermoelectric performance of Nb-doped SrTiO3.}, pages = {072101--072101}, title = {Thermoelectric phase diagram in a CaTiO3- SrTiO3 - BaTiO3 system}, volume = {90}, year = {2007} }