Sahana, M. ; Satyalakshmi, K. M. ; Hegde, M. S. ; Prasad, V. ; Subramanyam, S. V. (1997) Giant magnetoresistance in La0.6Pb0.4Mn(1-x)TixO3 films: enhancement of magnetoresistance due to Ti4+ substitution in Mn4+ sites Materials Research Bulletin, 32 (7). pp. 831-837. ISSN 0025-5408
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00255...
Related URL: http://dx.doi.org/10.1016/S0025-5408(97)00056-1
Abstract
Nonmagnetic Ti4+ ion is substituted for Mn4+ in La0.6Pb0.4MnO3. The resulting La0.6Pb0.4Mn(1-x)TixO3 (0 ≤ × ≤ 0.3) crystallizes in rhombohedral structure. The insulator-to-metal transition temperature decreases from 320 K to 92 K as x is varied from 0 to 0.09. Epitaxial films for the compositions x = 0, 0.03, 0.05, and 0.07 are fabricated by pulsed-laser deposition. Magnetoresistance at 6 T is enhanced from 38% for x = 0 to 75% for x = 0.07. The presence of Ti4+ (d0) ion decreases the Mn-Mn interaction through oxygen and thereby affects the resistivity and magnetoresistance of La0.6Pb0.4MnO3.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | A. Oxides; D. Electrical Properties; D. Magnetic Properties |
| ID Code: | 15827 |
| Deposited On: | 13 Nov 2010 12:28 |
| Last Modified: | 03 Jun 2011 08:33 |
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