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

被引：17

作者：

Ghigo, G. ^{[1
,2
]}

Torsello, D. ^{[1
,2
]}

Gozzelino, L. ^{[1
,2
]}

Tamegai, T. ^{[3
]}

Veshchunov, I. S. ^{[3
,4
]}

Pyon, S. ^{[3
]}

Jiao, W. ^{[5
]}

Cao, G-H ^{[5
]}

Grebenchuk, S. Yu ^{[4
]}

Golovchanskiy, I. A. ^{[4
]}

Stolyarov, V. S. ^{[4
]}

Roditchev, D. ^{[6
]}

机构：

[1] Politecn Torino, Dept Appl Sci & Technol, I-10129 Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[4] Moscow Inst Phys & Technol, Moscow 141700, Russia

[5] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China

[6] Sorbonne Univ, Inst NanoSci Paris, Ecole Super Phys & Chim Ind Ville Paris, Paris Sci & Lettres Res Univ,UMR8213,Lab Phys & E, F-75005 Paris, France

来源：

PHYSICAL REVIEW RESEARCH | 2019年 / 1卷 / 03期

基金：

日本学术振兴会; 俄罗斯科学基金会; 美国国家科学基金会;

关键词：

Magnetic fields - Ferromagnetism - Iron compounds - Magnetic susceptibility - Single crystals - Arsenic compounds - Europium compounds - Coplanar waveguides - Spin dynamics - Crystal structure - Vortex flow;

D O I：

10.1103/PhysRevResearch.1.033110

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.m 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 a comparison with magnetic force microscopy maps, we ascribe the chi(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 chi(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 critical point below 1 T.

引用

页数：8

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