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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Gonzalez, J. Murillo, N. Blanco, J.M. Quintana, P. Amano, E. Valenzuela, R. |
| Copyright Year | 1965 |
| Abstract | The influence of thermal treatments on the magnetostriction constant of Vitrovac/sup R/ 6025 amorphous alloys is reported. Annealing conditions (673 and 523 K at several annealing times) were chosen to result in nanocrystallization. The presence of nanocrystals led to a significant magnetic softening. No changes were observed on the saturation magnetization value at room temperature on the treated samples, as compared with the as-quenched sample. The magnetostriction constant, /spl lambda//sub s/, shifts from --0.14/spl times/10/sup -6/ for the as-quenched sample to positive values for the treated alloys. Samples annealed at 673 K exhibited two components of /spl lambda//sub s/ which depended on the tensile stress, /spl sigma/; one for low stress, and the other for high stress values, with the change at /spl sigma/=400 MPa. This behavior is interpreted in terms of a two-phase model, where one phase is the Fe-enriched residual amorphous fraction, and the other one is formed by Co-rich nanocrystals. For annealing at 723 K, a well-known relationship, /spl lambda//sub s/(/spl sigma/)=/spl lambda//sub s/(0)-A/spl sigma/, was observed, with no resolution of components. This difference is interpreted on the basis of the nanocrystals size: for 673 K, the nanocrystals are smaller than the exchange length, while they are larger for 723 K.< |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 4812 |
| Ending Page | 4814 |
| Page Count | 3 |
| File Size | 269914 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 30 |
| Issue Number | 6 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1994-11-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Magnetostriction Tensile stress Annealing Nanocrystals Amorphous materials Saturation magnetization Residual stresses Amorphous magnetic materials Softening Temperature |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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