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Magnetic Properties of Pb2Sr2Eu1-xCaxCu308+z Superconductors*

  • C.D. Nelson (a1), W.P. Pratt (a1) and P.P. Vaishnava (a2)

Abstract

X-ray diffraction and magnetic measurements using a SQUID magnetometer have been performed on the title compounds for 0 ≤ x ≤ 0.9. For 0 ≤ x ≤ 0.5, we have single phase materials. However, a small percentage of an impurity phase is noticed in the x = 0.7 sample, and the x = 0.9 sample is clearly not a single phase material. The transition temperature, the diamagnetic-shielding effect, and the Meissner-effect increase as x becomes larger. We have obtained, approximately, Hc1 ≤ 700 oe and Hc2 ≥ 800 k0e.

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Work supported by Center for Fundamental Materials Research of Michigan State University

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