Specific Heat of an Icosahedral Superconductor, Mg3Zn3Al2

J. E. Graebner; H. S. Chen

doi:10.1103/PhysRevLett.58.1945

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Specific Heat of an Icosahedral Superconductor, Mg3Zn3Al2

J. E. Graebner, H. S. Chen

DOI 10.1103/PhysRevLett.58.1945 · Physical Review Letters

T1

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Abstract

Specific-heat measurements are reported for cubic (c), icosahedral (i), and amorphous (a) phases of Mg3Zn3Al2 in the temperature range 0.04-5 K. All three phases are superconducting, with Tc=0.32, 0.41, and 0.75 K, respectively. The electronic density of states N(0) is comparable to that expected in the free-electron model for all three phases. Compared to the c phase, significant lattice softening is observed in the i phase and, especially, in the a phase, indicating an increase in the electron-phonon coupling parameter λ with decreasing order.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Mg3Zn3Al2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.32	Pressure not reported	unknown
Mg3Zn3Al2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.41	Pressure not reported	unknown
Mg3Zn3Al2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.75	Pressure not reported	unknown