Magnetic properties of a ferromagnetic metallic glass Fe80P16B1C3

A ferromagnetic metallic glass Fe
80
P
16
B
1
C
3
(METGLAS
^®
2615) has been studied from 4.2 K to 1100 K by
⁵⁷
Fe Mössbauer spectroscopy. In the glassy state, the magnetization axis stays in the ribbon plane at
T \gsim 420
K. Below 420 K, the axis on the average is at an angle to the ribbon plane. Since the magnetic ordering temperature T
c
is close to the lowest crystallization temperature, T
c
can only be estimated. There are two distinct crystallization temperatures. At
T_{cr1} = 568
K, the glassy sample transforms slowly but exclusively to α-Fe. At
T_{cr2} = 640
K, the remainder of the glassy sample transforms rapidly to α-Fe (
T_{c} = 1040
K) and Fe
3
P (
T_{c} = 715
K). These results are discussed in comparison with the thermomagnetization and x-ray data obtained previously.