An ac Susceptibility Study of Mn Substituted Amorphous FeZr Alloys
✍ Scribed by Perumal, A. ;Srinivas, V. ;Dhar, A. ;Rao, V.V. ;Dunlap, R.A.
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 137 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
The temperature dependence of the ac susceptibility of amorphous Fe 90Àx Mn x Zr 10 (x 0, 4, 8) has been measured at different ac fields in the frequency range of 80 Hz to 1 kHz. All the compositions of the present study exhibit a double magnetic transition below room temperature. It is found that the Curie temperature T C decreases while the spin-glass transition temperature T f increases as Mn concentration increases from 0 to 8 at%. The values of T C and critical exponent associated with the magnetic susceptibility were extracted from ac susceptibility measurements. The critical exponent is in close agreement with the value predicted by the three-dimensional Heisenberg model. The results obtained here can be explained on the basis of competing exchange interactions below the magnetic ordering temperature.