Revolution and Restoration, 1658–65

Krey, Gary S. De

doi:10.1007/978-1-137-05228-5_1

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…We have shown that the ratio l S /L z follows a universal dependence on the normalized penetration depth λ/L z and the normalized effective wall thicknessw/L z (see Figs. [4][5][6]. In addition to the exact numerical dependence, we have derived analytical expressions of this relation in limit cases.…”

Section: Discussionmentioning

confidence: 99%

“…In the discovered Uranium-based superconducting ferromagnets (SFM) UGe 2 1 , URhGe 2 and UCoGe 3 the Curie temperature Θ is much higher than the superconducting critical temperature T c which means that superconductivity appears in the ferromagnetic state where it is usually a domain structure (DS) which develops. In previous works [4][5][6][7][8] the influence of the superconducting screening currents on the DS has been studied in the case of thick or bulk systems, when the thickness 2L z along the easy magnetization direction is much larger than both the transverse domain width l (see Fig. 1) and the London penetration depth λ.…”

Section: Introduction and Modelmentioning

confidence: 99%

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Size of stripe domains in a superconducting ferromagnet

2011

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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 superconductivity always induces a shrinkage of the domains, and there is a critical value of penetration depth below which a mono-domain structure is more stable than the periodic one. 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.

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Section: Discussionmentioning

confidence: 99%

Section: Introduction and Modelmentioning

confidence: 99%

Size of stripe domains in a superconducting ferromagnet

2011

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“…5) From the results of extensive studies, however, it was found that ferromagnetism suffers antiferromagnetic modifications in the superconducting state. 2) Theoretically, various types of modification, such as those on cryptoferromagnetism, 6) spiral structure, 7) and domain structure, 8) are known. In some cases, there is no long range order.…”

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confidence: 99%

Absence of Meissner State and Robust Ferromagnetism in the Superconducting State of UCoGe: Possible Evidence of Spontaneous Vortex State

et al. 2010

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We report ac magnetic susceptibility and dc magnetization measurements on the superconducting ferromagnet UCoGe (with superconducting and Curie temperatures of TSC ∼ 0.5 K and TCurie ∼ 2.5 K, respectively). In the normal, ferromagnetic state (TSC < T < TCurie), the magnetization curve exhibits a hysteresis loop similar to that of a regular itinerant ferromagnet. Upon lowering the temperature below TSC, the spontaneous magnetization is unchanged, but the hysteresis is markedly enhanced. Even deeply inside the superconducting state, ferromagnetism is not completely shielded, and there is no Meissner region, a magnetic field region of H < Hc1 (a lower critical field). From these results, we suggest that UCoGe is the first material in which ferromagnetism robustly survives in the superconducting state and a spontaneous vortex state without the Meissner state is realized.

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Revolution and Restoration, 1658–65

Cited by 2 publications

References 15 publications

Size of stripe domains in a superconducting ferromagnet

Size of stripe domains in a superconducting ferromagnet

Absence of Meissner State and Robust Ferromagnetism in the Superconducting State of UCoGe: Possible Evidence of Spontaneous Vortex State

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