Mössbauer spectroscopy measurements on the 35.5 K superconductor Rb1−δEuFe4As4
Mohammed A. Albedah, Farshad Nejadsattari, Zbigniew M. Stadnik, Yi Liu, Guang-Han Cao
DOI 10.1103/PhysRevB.97.144426 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The results of x-ray diffraction and Fe57 and Eu151 Mössbauer spectroscopy measurements, supplemented with ab initio hyperfine-interaction parameter calculations, on the new 35.5 K superconductor Rb1−δEuFe4As4 are presented. The superconductor crystallizes in the tetragonal space group P4/mmm with the lattice parameters a=3.8849(1) Å and c=13.3370(3) Å. It is shown that there is no magnetic order of the Fe magnetic moments down to 2.1 K and that the ferromagnetic order is associated solely with the Eu magnetic moments. The Curie temperature TC=16.54(8) K is determined from the temperature dependence of both the hyperfine magnetic field at Eu151 nuclei and the transferred hyperfine magnetic field at Fe57 nuclei that is induced by the ferromagnetically ordered Eu sublattice. The Eu magnetic moments are demonstrated to be perpendicular to the crystallographic c axis. The temperature dependence of the principal component of the electric field gradient tensor, at both Fe and Eu sites, is well described by a T3/2 power-law relation. Good agreement between the calculated and measured hyperfine-interaction parameters is observed. The Debye temperature of Rb1−δEuFe4As4 is found to be 391(8) K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Rb1-δEuFe4As4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35.5 | Pressure not reported | unknown |
| RbEuFe4As4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36.5 | Pressure not reported | unknown |
Similar papers
Anisotropic upper critical field of pristine and proton-irradiated single crystals of the magnetically ordered superconductor RbEuFe4As4
similarity 0.95M. P. Smylie et al.
Source status unknown — claims are unverified
Electronic structure and coexistence of superconductivity with magnetism in RbEuFe4As4
similarity 0.94T. K. Kim et al.
Source status unknown — claims are unverified
Superconducting and magnetic phase diagram of RbEuFe4As4 and CsEuFe4As4 at high pressure
similarity 0.94Daniel E. Jackson et al.
Source status unknown — claims are unverified
Topological magnetic order and superconductivity in EuRbFe4As4
similarity 0.94M. Hemmida et al.
Source status unknown — claims are unverified
Superconductivity and ferromagnetism in hole-doped RbEuFe4As4
similarity 0.94Yi Liu et al.
Source status unknown — claims are unverified
RbEu(Fe1−xNix)4As4: From a ferromagnetic superconductor to a superconducting ferromagnet
similarity 0.94Yi Liu et al.
Source status unknown — claims are unverified