First order transition from antiferromagnetism to ferromagnetism in   Ce(Fe$_{0.96}$Al$_{0.04})_2$
  Results of dc magnetization study are presented showing interesting thermomagnetic history effects across the antiferromagnetic to ferromagnetic transition in Ce(Fe$_{0.96}$Al$_{0.04})_2$. Specifically, we observe (i)ZFC/FC irreversibility rising with increasing field; (ii) virgin curve lying outside the envelope M-H curve. We argue that these effects are quite different from the characteristics seen in spin-glasses or in hard ferromagnets; they can be understood as metastabilities associated with a first order magnetic phase transition. 
M. A. Manekar, S. Chaudhary, M. K. Chattopadhyay, K. J. Singh, S. B.   Roy and P. Chaddah