Evidence for intermediate temperature superconductivity as a bulk effect

Steglich, F.; Armbrüster, H.

doi:10.1016/0038-1098(74)90389-5

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Evidence for intermediate temperature superconductivity as a bulk effect

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Steglich, F., & Armbrüster, H. (1974). Evidence for intermediate temperature superconductivity as a bulk effect. Solid State Communications, 14(10), 903-906. doi:10.1016/0038-1098(74)90389-5.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-BF49-7

Abstract

The specific heat was measured in a highly homogenized sample of (La0.9936Ce0.0064) Al2 between 0.35 and 1.5 K, both in the superconducting and in the normal state. The difference of the specific heats ΔC = CS − CN was observed to change its sign twice. Hence the existence of an ‘intermediate temperature superconductor’ is suggested by means of a true volume effect. Reasonable agreement is found between the conclusions from the specific heat experiment and recent results of Winzer obtained for the upper critical magnetic field.