Temperature-induced itinerant-electron metamagnetism in intermetallic compounds RCo_3
The phenomenon of temperature-induced itinerant-electron metamagnetism in zero external field has the same nature as the widely investigated metamagnetic transitions induced by magnetic field (external or internal). Recently, temperature-induced itinerant-electron metamagnetism was discovered in the rare-earth intermetallic compounds RСo_3. Systematic investigations of the RСo_3 series made it possible to determine many specific features of this new phenomenon and to formulate criteria that permit one to reveal such transitions also in other magnetic materials. In this paper, a brief review of available works is given, and the original results of the study of temperature-induced itinerant-electron metamagnetism in substituted RСo_3 compounds are presented.