2022
DOI: 10.1038/s41598-022-24012-z
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Second magnetization peak, anomalous field penetration, and Josephson vortices in KCa$$_2$$Fe$$_4$$As$$_4$$F$$_2$$ bilayer pnictide superconductor

Abstract: We performed magnetization measurements in a single crystal of the anisotropic bilayer pnictide superconductor KCa$$_2$$ 2 Fe$$_4$$ 4 As$$_4$$ 4 F$$_2$$ 2 … Show more

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Cited by 4 publications
(3 citation statements)
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“…Such high anisotropy was also observed in another iron pnictide KCa Fe As F , which has a bilayer structure and a possible pseudogap behavior similar to BSCCO 29 31 . Moreover, interesting vortex dynamics behaviour has also been observed in a recent study on anisotropic KCa Fe As F compound 32 . These salient features, in addition to the triclinic crystal structure (contrary to the tetragonal crystal structure in cuprates and other iron pnictide superconductors), make the 10-3-8 phase a unique compound to explore interesting and possibly new vortex phases.…”
Section: Introductionmentioning
confidence: 53%
“…Such high anisotropy was also observed in another iron pnictide KCa Fe As F , which has a bilayer structure and a possible pseudogap behavior similar to BSCCO 29 31 . Moreover, interesting vortex dynamics behaviour has also been observed in a recent study on anisotropic KCa Fe As F compound 32 . These salient features, in addition to the triclinic crystal structure (contrary to the tetragonal crystal structure in cuprates and other iron pnictide superconductors), make the 10-3-8 phase a unique compound to explore interesting and possibly new vortex phases.…”
Section: Introductionmentioning
confidence: 53%
“…In our previous studies, a very steep slope of the upper critical field near T c and a strong pauli-paramagnetic effect in KCa 2 Fe 4 As 4 F 2 have been reported [10,11]. The second magnetization peak were revealed both in the RbCa 2 Fe 4 As 4 F 2 and KCa 2 Fe 4 As 4 F 2 systems by the magnetization measurements [22][23][24]. Recent scanning tunneling microscopy measurements have revealed the Friedel oscillations of vortex bound states and a new type of vortex pattern with bamboo-like chains in confined canals in the KCa 2 Fe 4 As 4 F 2 compound [25,26].…”
Section: Introductionmentioning
confidence: 75%
“…Moreover, they have lower anisotropy values than cuprates, with associated high pinning energy values [8][9][10][11]. Among these properties, there are also non-monotonic responses to magnetization with applied magnetic fields; this has led to particular phenomena that have been deeply studied in recent years [12][13][14][15][16]. These phenomena are strictly correlated 2 of 11 with vortex dynamics [17][18][19][20][21].…”
Section: Introductionmentioning
confidence: 99%