Coexistence of ferromagnetic and antiferromagnetic phases in compound LaFe11.4Al1.6

A metastable state with coexistence of ferromagnetic and antiferromagnetic phases has been confirmed in compound LaFe11.4Al1.6 by thermomagnetic curves at different external fields. The temperature behavior of the critical field could be explained by taking into consideration the metastable state. The existence of the metastable state is attributed to the exchange interactions and lattice disorder.