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

doi:10.1134/S0021364017020151

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

Interfaces and Correlated Electron Systems

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Abstract

Magnetic flux structure on the surface of EuFe₂(As_1-xP_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_SC= 22 K and T_C = (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 T_C. The nature of this structure is discussed.

Original language	English
Pages (from-to)	98-102
Number of pages	5
Journal	JETP letters
Volume	105
Issue number	2
DOIs	https://doi.org/10.1134/S0021364017020151
Publication status	Published - 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., Grebenchuk, S. Y., Baranov, D. S., Golovchanskiy, I. A., Pyon, S., Sun, H., Jiao, W., Cao, G., Tamegai, T., & 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

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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.",

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doi = "10.1134/S0021364017020151",

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T1 - Visualization of the magnetic flux structure in phosphorus-doped EuFe2As2 single crystals

AU - Veshchunov, I. S.

AU - Vinnikov, L. Ya

AU - Stolyarov, V.S.

AU - Yu-shan zhou, N.

AU - Shi, Z. X.

AU - Xu, X. F.

AU - Grebenchuk, S. Yu

AU - Baranov, D. S.

AU - Golovchanskiy, I.A.

AU - Pyon, S.

AU - Sun, Hong-yue

AU - Jiao, Wenhe

AU - Cao, Guanghan

AU - Tamegai, T.

AU - Golubov, A. A.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - 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.

AB - 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.

KW - 22/4 OA procedure

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DO - 10.1134/S0021364017020151

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VL - 105

SP - 98

EP - 102

JO - JETP letters

JF - JETP letters

SN - 0021-3640

IS - 2

ER -

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

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