TY - JOUR

T1 - Effects of oxygen isotope and stoichiometry on the structural and transport properties

AU - Heilman, A.

AU - Xue, Y.

AU - Sun, Y.

AU - Meng, R.

AU - Wang, Y.

AU - Lorenz, B.

AU - Chu, C.

AU - Franck, J.

AU - Chen, Weimin

PY - 2000

Y1 - 2000

N2 - Thermoelectric power (S) and lattice parameter (Formula presented) b, (Formula presented) measurements are used to determine the change in the carrier concentration (n) in both isotope exchanged and oxygen deficient samples of (Formula presented) It is observed upon substitution of the (Formula presented) isotope for (Formula presented) that the Curie temperature (Formula presented) decreases but no significant changes in S at 290 K and a, b, or c are seen. In contrast, for samples that are oxygen deficient, significant changes in S at 290 K and a, b, and c are observed, in addition to decreases in (Formula presented) It is found that the estimated (Formula presented) correlating to the observed (Formula presented) cannot account for the isotope-induced change in (Formula presented) Therefore it is concluded that any oxygen deficiencies introduced by the isotope exchange are negligible and do not account for the (Formula presented) change observed.

AB - Thermoelectric power (S) and lattice parameter (Formula presented) b, (Formula presented) measurements are used to determine the change in the carrier concentration (n) in both isotope exchanged and oxygen deficient samples of (Formula presented) It is observed upon substitution of the (Formula presented) isotope for (Formula presented) that the Curie temperature (Formula presented) decreases but no significant changes in S at 290 K and a, b, or c are seen. In contrast, for samples that are oxygen deficient, significant changes in S at 290 K and a, b, and c are observed, in addition to decreases in (Formula presented) It is found that the estimated (Formula presented) correlating to the observed (Formula presented) cannot account for the isotope-induced change in (Formula presented) Therefore it is concluded that any oxygen deficiencies introduced by the isotope exchange are negligible and do not account for the (Formula presented) change observed.

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U2 - 10.1103/PhysRevB.61.8950

DO - 10.1103/PhysRevB.61.8950

M3 - Article

AN - SCOPUS:0009767010

VL - 61

SP - 8950

EP - 8954

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 13

ER -