Evidence of discrete energy states and cluster-glass behavior in Sr${}_{2-x}$La${}_x$CoNbO${}_6$

Ajay Kumar, B. Schwarz, H. Ehrenberg +1

We report the detailed analysis of specific heat [C${}_{\mathrm{P}}$(T)] and ac-susceptibility for magnetically frustrated Sr${}_{2-x}$La${}_x$CoNbO${}_6$ ($x=$ 0--1) double perovskites to unde…