Mössbauer spectroscopy study of magnetic fluctuations in superconducting RbGd${}_2$Fe${}_4$As${}_4$O${}_2$

Yang Li, Zhicheng Wang, Guanghan Cao +6

${}^{57}$Fe Mössbauer spectra were measured at different temperatures between 5.9 K and 300 K on the recently discovered self-doped superconducting RbGd${}_2$Fe${}_4$As${}_4$O${}_2$ with T$_…