Strongly fluctuating moments in the high-temperature magnetic superconductor RbEuFe${}_4$As${}_4$

K. Willa, R. Willa, J. -K. Bao +5

We report detailed specific heat measurements on the recently discovered magnetic superconductor RbEuFe${}_4$As${}_4$. We investigated the superconducting transition at 37K and extract…