Visualization of the magnetic flux structure in phosphorus-doped EuFe2As2 single crystals

I. S. Veshchunov, L. Ya Vinnikov*, V.S. Stolyarov, N. Yu-shan zhou, Z. X. Shi, X. F. Xu, S. Yu Grebenchuk, D. S. Baranov, I.A. Golovchanskiy, S. Pyon, Hong-yue Sun, Wenhe Jiao, Guanghan Cao, T. Tamegai, A. A. Golubov

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)

Abstract

Magnetic flux structure on the surface of EuFe2(As1-xPx)2 single crystals with nearly optimal phosphorus doping levels x = 0.20 and x = 0.21 is studied by low-temperature magnetic force microscopy and decoration with ferromagnetic nanoparticles. The studies are performed in a broad temperature range. It is shown that the single crystal with x = 0.21 in the temperature range between the critical temperatures TSC= 22 K and TC = (18 ± 0.3) K of the superconducting and ferromagnetic phase transitions, respectively, has the vortex structure of a frozen magnetic flux, typical for type-II superconductors. The magnetic domain structure is observed in the superconducting state below TC. The nature of this structure is discussed.

Original languageEnglish
Pages (from-to)98-102
Number of pages5
JournalJETP letters
Volume105
Issue number2
DOIs
Publication statusPublished - 1 Jan 2017

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    Veshchunov, I. S., Vinnikov, L. Y., Stolyarov, V. S., Yu-shan zhou, N., Shi, Z. X., Xu, X. F., ... Golubov, A. A. (2017). Visualization of the magnetic flux structure in phosphorus-doped EuFe2As2 single crystals. JETP letters, 105(2), 98-102. https://doi.org/10.1134/S0021364017020151