Size of stripe domains in a superconducting ferromagnet

Vu Hung Dao; Sébastien Burdin; Alexandre Buzdin

doi:10.1103/PhysRevB.84.134503

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Size of stripe domains in a superconducting ferromagnet

Vu Hung Dao, Sébastien Burdin, Alexandre Buzdin

DOI 10.1103/PhysRevB.84.134503 · Physical Review B

T1

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Abstract

In a superconducting ferromagnet, the superconducting state appears in the ferromagnetic phase where usually a domain structure has already developed. We study the influence of the superconducting screening currents on a stripe structure with out-of-plane magnetization, in a film of arbitrary thickness. We find that the occurrence of superconductivity always induces a shrinkage of the domains. Nevertheless, a monodomain structure may occur with lowering temperature when the London penetration depth decreases. Furthermore, we investigate the possible different effects of singlet and triplet superconductivity on the domain width, as well as the conditions for the existence of vortices in the domains. The obtained results are then discussed in light of the experimental data of superconducting ferromagnets URhGe, UGe2, and UCoGe.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
URhGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UGe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UCoGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown