| Autor: |
Pchelina, D. I., Medvetskaya, I. Yu., Chistyakova, N. I., Rusakov, V. S., Sedykh, V. D., Alekhina, Yu. A. |
| Zdroj: |
Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; Nov2018, Vol. 12 Issue 6, p1047-1051, 5p |
| Abstrakt: |
Abstract: Mössbauer and magnetic studies of Ca-doped lanthanum manganites La1 - xCaxMn0.98Fe0.02O3 + δ (x = 0.05, 0.10, 0.20) of a nonstoichiometric composition are performed. An increase in the Ca concentration and a decrease in the interstitial oxygen quantity results in a decreasing electric-field gradient in the region of the Fe atomic nucleus due to the spatial rearrangement of the charge of surrounding atoms. The Mössbauer spectra of all studied lanthanum-manganite samples demonstrate a relaxation character at low temperatures, which can be associated with the presence of small-sized magnetic clusters. This finding correlates with the results of magnetic investigations. The values of the coercive force, saturation magnetization, and blocking temperature are determined. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink