TY - JOUR
T1 - Susceptibility, crystal-structure, and specific-heat studies of the high-Tc superconductor and quenched YBa2(Cu0.91Fe0.09)3Ox
AU - Felner, I.
AU - Wolfus, Y.
AU - Hilscher, G.
AU - Pillmayr, N.
PY - 1989
Y1 - 1989
N2 - Magnetic susceptibility, poweder x-ray diffraction, and specific-heat measurements were used to study the high-temperature superconductor YBa2(Cu0.91Fe0.09)3O7.1 and the nonsuperconductor quenched YBa2(Cu0.91Fe0.09)3O6.1 samples. The crystal structure for both samples is tetragonal with almost the same lattice parameters. No magnetic spin-glass state of Fe is observed in the two samples at low temperatures and the quenched sample exhibits antiferromagnetic behavior, whereas the magnetization is nonlinear as a function of the applied field. For the superconducting sample, magnetic irreversibilities appear below a temperature Tg whose field dependence differs substantially from that observed in spin glasses. Tg scales with the applied field as H14. The linear term obtained from the specific-heat studies is extremely high, =73 mJ/molK2.
AB - Magnetic susceptibility, poweder x-ray diffraction, and specific-heat measurements were used to study the high-temperature superconductor YBa2(Cu0.91Fe0.09)3O7.1 and the nonsuperconductor quenched YBa2(Cu0.91Fe0.09)3O6.1 samples. The crystal structure for both samples is tetragonal with almost the same lattice parameters. No magnetic spin-glass state of Fe is observed in the two samples at low temperatures and the quenched sample exhibits antiferromagnetic behavior, whereas the magnetization is nonlinear as a function of the applied field. For the superconducting sample, magnetic irreversibilities appear below a temperature Tg whose field dependence differs substantially from that observed in spin glasses. Tg scales with the applied field as H14. The linear term obtained from the specific-heat studies is extremely high, =73 mJ/molK2.
UR - http://www.scopus.com/inward/record.url?scp=26144437482&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.39.225
DO - 10.1103/PhysRevB.39.225
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AN - SCOPUS:26144437482
SN - 0163-1829
VL - 39
SP - 225
EP - 230
JO - Physical Review B
JF - Physical Review B
IS - 1
ER -