Visualization of Magnetic Flux Structure in Phosphorus-Doped EuFe${}_2$As${}_2$ Single Crystals

Abstract

Magnetic flux structure on the surface of EuFe${}_2$(As${}_{1-\mathrm{x}}$P${}_{\mathrm{x}}$)${}_2$ 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 $T_{\mathrm{SC}}=22$ K and $T_{\mathrm{C}}=17.7$ 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 $T_{\mathrm{C}}$. The nature of this structure is discussed.

arXiv comment6 pages, 3 figures

References in corpus (13)

• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Superconductivity induced by phosphorus doping and its coexistence with ferromagnetism in EuFe${}_2$(As${}_{0.7}$P${}_{0.3}$)${}_2$
• Interplay of antiferromagnetism, ferromagnetism and superconductivity in EuFe_2(As_1-xP_x)_2 single crystals
• Coexistence of Superconductivity and Ferromagnetism in P-doped EuFe2As2
• Spontaneous vortex phase discovered?
• Reply to "Comment on "Domain Structure in a Superconducting Ferromagnet""
• Observation of the magnetic domain structures in Cu${}_{0,47}$Ni${}_{0,53}$ thin films at low temperatures
• Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Competition and coexistence of antiferromagnetism and superconductivity in RBa_2Cu_3O_{6+x} (R = Lu, Y) single crystals
• Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ErNi2B2C
• Visualization of ferromagnetic domains in TbNi${}_2$B${}_2$C and ErNi${}_2$B${}_2$C single crystals: Weak ferromagnetism and its coexistence with superconductivity
• Phase transitions in the domain structure of ferromagnetic superconductors
• Effects of $c/a$ Anisotropy and Local Crystal Structure on Superconductivity in $A\mathrm{F}{\mathrm{e}}_2({\mathrm{As}}_{1-x}{\mathrm{P}}_x{)}_2$ ($A$=Ba${}_{1-y}$Sr${}_y$, Sr${}_{1-y}$Ca${}_y$ and Eu)

Cited by in corpus (10)

• Theory of the magnetic domains phases in ferromagnetic superconductors
• RbEu(Fe${}_{1-x}$Ni${}_x$)${}_4$As${}_4$: From a ferromagnetic superconductor to a superconducting ferromagnet
• Unique interplay between superconducting and ferromagnetic orders in EuRbFe${}_4$As${}_4$
• Superconductivity driven helical magnetic structure in EuRbFe${}_4$As${}_4$ ferromagnetic superconductor
• Helical structures in layered magnetic superconductors due to indirect exchange interactions mediated by interlayer tunneling
• Self-induced Magnetic Flux Structure in the Magnetic Superconductor RbEuFe${}_4$As${}_4$
• Magnetism and superconductivity in Eu(Fe${}_{1-x}$Ni${}_x$)As${}_2$ ($x$ = 0, 0.04)
• Novel magnetic stoichiometric superconductor EuRbFe4As4
• Spin waves and high-frequency response in layered superconductors with helical magnetic structure
• Multiple magnetic orders discovered in the superconducting state of EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$