Field-induced reentrant superconductivity in the Heusler alloy system Pd2Y1−xDyxSn
S. K. Malik, A. M. Umarji, G. K. Shenoy
DOI 10.1103/PhysRevB.34.3144 · Physical Review B
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Abstract
The ternary compound Pd2YSn crystallizing in the cubic Heusler (L21) structure is superconducting with a superconducting transition temperature (Tc) of 4.55 K. The superconducting and magnetic phase diagram of the pseudoternary system Pd2Y1−xDyxSn (x=0–1) has been investigated. The superconducting Tc of Pd2YSn decreases with the replacement of Y by Dy and superconductivity is completely suppressed at a critical concentration of Dy corresponding to x∼0.35. The samples with x≥0.5 are antiferromagnetically ordered with Néel temperatures ranging from 5 K for x=0.5–15 K for x=1.0 (Pd2DySn). The superconducting samples with x>0 show reentrant behavior under external applied fields. The temperature dependence of the upper critical field in Pd2Y1−xDyxSn (x=0.0, 0.1, and 0.15) has been measured and is analyzed in terms of the Werthamer-Helfand-Hohenberg theory including the pair-breaking effects due to paramagnetic rare-earth ions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pd2YSn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.55 | Pressure not reported | unknown |
| Pd2YbSn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.23 | Pressure not reported | unknown |
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