Data from simulations of the specific heat and magnetization of Ag:Er alloys. The parameter range we consider are temperatures between 1mK and 1K, external magnetic fields of up to 20mT, and erbium concentrations of up to 2000ppm.Part of this research was performed in the framework of the DFG Research Unit
FOR2202 "Neutrino Mass Determination by Electron Capture in 163Ho, ECHo" (funding under EN 299/7-1
and EN 299/7-2, EN 299/8-1, GA 2219/2-1 and GA 2219/2-2). The research leading to these results has received
funding from the European Union's Horizon 2020 Research and Innovation Programme, under Grant
Agreement no 824109 (European Microkelvin Platform). A. Barth and F. Mantegazzini acknowledge funding
from the Research Training Group HighRR (GRK 2058) funded through the Deutsche Forschungsgemeinschaft,
DFG