TY - JOUR
T1 - Relationship between weak ferromagnetism, superconductivity, and lattice parameter in the A2-x-yBxCeyCuO4 (A,B≡La, Pr, Nd, Sm, Eu, Gd, Y) compounds
AU - Schultz, T.
AU - Smith, R.
AU - Fondado, A.
AU - Maley, C.
AU - Beacom, T.
AU - Tinklenberg, P.
AU - Gross, J.
AU - Saylor, C.
AU - Oseroff, S.
AU - Fisk, Z.
AU - Cheong, S. W.
AU - Jones, T. E.
PY - 1994
Y1 - 1994
N2 - We report the results obtained by x-ray, dc magnetization, ac magnetic susceptibility, microwave magnetic absorption, and electron paramagnetic resonance of the magnetic and superconductive properties of a large series of compounds of the form A2-x-yBxCeyCuO 4 with A,B≡La, Pr, Nd, Sm, Eu, Gd, and Y. For y=0 antiferromagnetic ordering of the copper moments is present at T N≊280 K for all the compounds formed in the tetragonal T' phase. Weak ferromagnetism (WF) associated with the canting of the copper moments is observed in all the compounds with a lattice parameter, a0, a0≊3.91 Å, regardless of the rare-earth (R) ions present in the system. Superconductivity is observed only in the Ce-doped compounds with a≳a1, a1≊3.92 Å. The maximum onset temperature Tc is found for a≊3.95 Å. A phase diagram was obtained by varying the lattice parameter size as a function of A, B, and x. The correlation between the appearance of WF in the undoped compounds and the disappearance of superconductivity in the Ce-doped systems is discussed.
AB - We report the results obtained by x-ray, dc magnetization, ac magnetic susceptibility, microwave magnetic absorption, and electron paramagnetic resonance of the magnetic and superconductive properties of a large series of compounds of the form A2-x-yBxCeyCuO 4 with A,B≡La, Pr, Nd, Sm, Eu, Gd, and Y. For y=0 antiferromagnetic ordering of the copper moments is present at T N≊280 K for all the compounds formed in the tetragonal T' phase. Weak ferromagnetism (WF) associated with the canting of the copper moments is observed in all the compounds with a lattice parameter, a0, a0≊3.91 Å, regardless of the rare-earth (R) ions present in the system. Superconductivity is observed only in the Ce-doped compounds with a≳a1, a1≊3.92 Å. The maximum onset temperature Tc is found for a≊3.95 Å. A phase diagram was obtained by varying the lattice parameter size as a function of A, B, and x. The correlation between the appearance of WF in the undoped compounds and the disappearance of superconductivity in the Ce-doped systems is discussed.
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U2 - 10.1063/1.356982
DO - 10.1063/1.356982
M3 - Article
AN - SCOPUS:0542443705
SN - 0021-8979
VL - 75
SP - 6723
EP - 6725
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 10
ER -