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1 PublicationVortex lock-in transition and evidence for transitions among commensurate kinked vortex configurations in single-layered Fe arsenides
Li, G.; Grissonnanche, G.; Conner, B. S.; Wolff-Fabris, F.; Putzke, C.; Zhigadlo, N. D.; Katrych, S.; Bukowski, Z.; Karpinski, J.; Balicas, L.
Abstract
We report an angle-dependent study of the magnetic torque τ (θ) within the vortex state of single-crystalline LaO0.9F0.1FeAs and SmO0.9F0.1FeAs as a function of both temperature T and magnetic field H. Sharp peaks are observed at a critical angle θc at either side of θ = 90◦, where θ is the angle between H and the interplanar c axis. θc is interpreted as the critical depinning angle where the vortex lattice, pinned and locked by the intrinsic planar structure, unlocks and acquires a component perpendicular to the planes. We observe a series of smaller replica peaks as a function of θ and as θ is swept away from the planar direction. These suggest commensurability effects between the period of the vortex lattice and the interplanar distance leading to additional kinked vortex configurations.
Involved research facilities
- High Magnetic Field Laboratory (HLD)
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Physical Review B 87(2013), 100503(R)
DOI: 10.1103/PhysRevB.87.100503
Cited 2 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-18834