Microwave analysis of the interplay between magnetism and superconductivity in EuFe2(As1−xPx)2 single crystals

Ghigo, G.; Torsello, D.; Gozzelino, L.; Tamegai, T.; Veshchunov, I.S.; Pyon, S.; Jiao, W.; Cao, G.H.; Grebenchuk, S.Y.; Golovchanskiy, I.A.; Stolyarov, V.S.; Roditchev, D.

Авторы: Ghigo G., Torsello D., Gozzelino L., Tamegai T., Veshchunov I.S., Pyon S., Jiao W., Cao G.H., Grebenchuk S.Yu, Golovchanskiy I.A., Stolyarov V.S., Roditchev D.
Журнал: Physical Review Research
Том: 1
Номер: 033110
Год издания: 2019
Первая страница: 033110-1
Последняя страница: 033110-2
DOI: 10.1103/PhysRevResearch.1.033110
Аннотация: We report on the microwave analysis of the interplay between magnetism and superconductivity in single crystals of EuFe2(As1−xPx )2, accomplished by means of a coplanar waveguide resonator technique. The bulk complex magnetic susceptibility χm extracted through a cavity perturbation approach is demonstrated to be highly sensitive to the magnetic structure and dynamics, revealing two distinct magnetic transitions below the superconducting critical temperature. By comparison with magnetic force microscopy maps, we ascribe the χ_m peak observed at about 17 K to the transition from the ferromagnetic domain Meissner phase to the domain vortex-antivortex state, with the subsequent evolution of the domain structure at lower temperatures. The second χ_m peak observed at 11 K reflects a specific high-frequency feature, connected to vortex-antivortex dynamics and eventual spin reorientation transition of the Eu2+ canted ferromagnetic subsystem. The two peaks merge and vanish upon application of an in-plane magnetic field, which is compatible with the presence of a quantum the critical point below 1 T.
Добавил в систему: Столяров Василий Сергеевич

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Microwave analysis of the interplay between magnetism and superconductivity in EuFe2(As1−xPx)2 single crystalsстатья

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