Superconductivity, crystal-field effects, and magnetic order in the (Sm1−xYx)Rh4B4 mixed ternary system

S. E. Lambert; M. B. Maple; B. D. Dunlap

doi:10.1103/PhysRevB.33.3129

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Superconductivity, crystal-field effects, and magnetic order in the (Sm1−xYx)Rh4B4 mixed ternary system

S. E. Lambert, M. B. Maple, B. D. Dunlap

DOI 10.1103/PhysRevB.33.3129 · Physical Review B

T1

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Abstract

The phase diagram of the superconducting transition temperature Tc and the magnetic ordering temperature TM versus the composition x has been determined for the mixed ternary system (Sm1−xYx)Rh4B4. The x dependence of Tc is described well by the Abrikosov-Gor’kov theory modified to include the influence of the crystalline electric field on the Sm3+ ions. Heat-capacity measurements show that TM decreases linearly with x at the rate dTM/dx=-0.0128 K/(at. % Y). The influence of this magnetic order on superconductivity suggests that a transition from antiferromagnetism to ferromagnetism takes place for x∼0.4.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
(Sm1-xYx)Rh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
SmRh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.7	Pressure not reported	unknown
YRh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10.7	Pressure not reported	unknown