| Autor: |
Villafuerte, M.J., Duhalde, S., Terzzoli, M.C., Polla, G., Leyva, G., Correra, L. |
| Předmět: |
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| Zdroj: |
Applied Physics A: Materials Science & Processing; 1999, Vol. 69 Issue 7, pS565, 1p |
| Abstrakt: |
Abstract. The magnetotransport properties of perovskite manganite films have attracted much recent interest because of the colossal magnetoresistance (CMR) exhibited. The La[sub 1-x]Sr[sub x]MnO[sub 3] mixed valence compound contains Mn[sup 3+] with the configuration t[sup 3, sub 2g] e[sup l, sub g] and Mn[sup 4+] ions with a t[sup 3, sub 2g] structure Doping with Sn could play a role regarding the structural and magnetotransport properties, for tin ions do not have the same interactions as manganese ions. We report in this work the structural and transport characteristics of as-deposited and postdeposition annealed La[sub 0.67]Sr[sub 0.33]Mn[sub 1-x] Sn[sub x]O[sub 3] thin films by pulsed-laser deposition (PLD). We analyzed the influence of the tin doping on film properties. X-ray diffraction (XRD), scanning electron microscopy (SEM), and R vs. T measurements were performed. We found that tin doping promotes oxygenation of the films, increasing the temperature of electrical transition T[sub rho], and could be an alternative to postannealing treatments. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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