Ferromagnetic resonance and magnetic ordering in amorphous (FeMn)CP alloys

Publisher Website
Google Scholar
Abstract
The magnetic properties of a series of amorphous (FexMn1−x)80P16C4 metallic glasses have been studied via ferromagnetic resonance and zero field ac susceptibility measurements. We find that the Fe ferromagnetism is rapidly destroyed by the competition with the antiferromagnetic coupling of the Mn moment, leading to a cluster glass or spin glass phase in the concentration range x≲70%. Alloys with x greater than 70% show a transition to ferromagnetism with well defined critical behavior. In addition, both the susceptibility and the magnetic resonance reveal a marked anomaly at lower temperatures which can be attributed to the coexistence of ferromagnetism and spin glass order. These anomalies become weaker as the alloys become more strongly ferromagnetic. No resonance signals were detected in alloys with x≲20%.