Abstract
The effect of the environment on the magnetic properties of Fe-ions in a sodium germanate glass, a sodium silicate glass, and in the same devitrified glasses has been studied. In the four samples investigated, the inverse magnetic susceptibility (χ-1) follows a Curie-Weiss law behavior with a negative Curie temperature θp indicating an antiferromagnetic interaction in the four samples. The measurements also revealed that |θp| in both glass matrices is relatively low (<10 K) while in the crystalline samples it increased by 4-fold in the silicate and by about 20-fold in the germanate. The molecular field coefficients γm are negative for all four samples. The γm values for the Fe-germanate glass and the crystalline sample are 3 and 10 times larger than the corresponding values for Fe-silicate. These results reflect a stronger exchange interaction in the germanate (glass and crystalline) than the silicate samples.
Original language | English |
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Pages (from-to) | 688-692 |
Number of pages | 5 |
Journal | Journal of Non-Crystalline Solids |
Volume | 293-295 |
Issue number | 1 |
DOIs | |
State | Published - Nov 2001 |
Bibliographical note
Funding Information:The authors would like to acknowledge the support of King Fahd University of Petroleum and Minerals.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry