| Autor: |
Tan, G. T., Dai, S. Y., Duan, P., Zhou, Y. L., Lu, H. B., Chen, Z. H. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 5/1/2003, Vol. 93 Issue 9, p5480, 4p, 4 Graphs |
| Abstrakt: |
In this study, the electrical and magnetic properties of La[sub 1-x]Te[sub x]MnO[sub 3] (x=0.1, 0.15), which is a new material and shows good colossal magnetoresistance behavior, have been investigated. These compounds have rhombohedral structure. In this material, Te replaced a part of La ions, which induced the lattice cell constriction and Mn–O–Mn bond angle widening. X-ray photoemission spectroscopy measurement revealed that the Te ions were in the tetravalent state and the manganese ions could be considered as in a mixture state of Mn[sup 2+] and Mn[sup 3+]. Thus the material could be viewed as an electron-doped compound. The Curie temperature (Tc) was about 240 and 255 K for x=0.1, 0.15, respectively. The maximum magnetoresistance ratio MR=[ρ(0)-ρ(H)]/ρ(0) was about 51% at 200 K and in the applied magnetic field of 40 kOe. © 2003 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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