Tuning superconductivity in Eu(Fe0.81Co0.19)2As2 with magnetic fields

Vinh Hung Tran; Tomasz A. Zaleski; Zbigniew Bukowski; Lan Maria Tran; Andrzej J. Zaleski

doi:10.1103/PhysRevB.85.052502

← Back to search

Tuning superconductivity in Eu(Fe0.81Co0.19)2As2 with magnetic fields

Vinh Hung Tran, Tomasz A. Zaleski, Zbigniew Bukowski, Lan Maria Tran, Andrzej J. Zaleski

DOI 10.1103/PhysRevB.85.052502 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We present results of ac-magnetic susceptibility, dc-magnetization, and magnetotransport measurements on a single crystal of a magnetic Eu(Fe0.81Co0.19)2As2 superconductor. The compound undergoes two phase transitions: into a canted antiferromagnetic state at TN=16.5 K and a superconducting state at Tc∼5.15 K in a zero field. Based on our experimental results, we conclude that Tc can further be increased up to 6.5 K with magnetic fields applied parallel to the ab plane of crystals. We argue that the tuning superconductivity may be actuated by suppressing the ferromagnetic component along the c axis of the Eu2+ moments, diminishing the orbital pair-breaking effect.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Eu(Fe0.81Co0.19)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.15	Pressure not reported	unknown
Eu(Fe0.81Co0.19)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.15	Pressure not reported	unknown
Ca(Fe0.96Co0.04)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	21.3	Pressure not reported	unknown