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8220087 
Journal Article 
Study of magnetic properties of amorphous Fe-Mn-Zr alloys 
Perumal, A 
2006 
72 
1 
43-48 
English 
We report the study of ac susceptibility, magnetization and magnetoresistivity in the temperature range of 4.2 K to 300 K and in the magnetic field up to 6 Tesla on amorphous Fe90-x, MnxZr10 (x = 0-16) alloys. All the samples exhibit clear reentrant magnetic phase transition behaviour. The magnetic parameters such as coercivity, local magnetic anisotropy and high-field susceptibility are found to increase with Mn concentration. The agnetoresistivity study shows that remarkable effects due to magnetic ordering are present and the magnitude of spontaneous resistive anisotropy decreases with increasing Mn concentration. The present observations suggest that the antiferromagnetic coupling increases significantly with Mn concentration and described by an exchange frustration model. The obtained results provide conclusive evidence of weak-itinerant ferromagnetism for all the samples of present investigation. 
Exchange frustration; Magnetic anisotropy; Magnetization; Magnetoresistivity; Reentrant behaviour; Spin glass; Spontaneous resistive anisotropy