GIANT MAGNETORESISTANCE IN LA0.6PB0.4MN(1-X)TIXO3 FILMS - ENHANCEMENTOF MAGNETORESISTANCE DUE TO TI4+ SUBSTITUTION IN MN4+ SITES

Authors
SAHANA M SATYALAKSHMI KM HEGDE MS PRASAD V SUBRAMANYAM SV
Citation
M. Sahana et al., GIANT MAGNETORESISTANCE IN LA0.6PB0.4MN(1-X)TIXO3 FILMS - ENHANCEMENTOF MAGNETORESISTANCE DUE TO TI4+ SUBSTITUTION IN MN4+ SITES, Materials research bulletin, 32(7), 1997, pp. 831-837
Citations number
16
Categorie Soggetti
Material Science
Journal title
Materials research bulletin → ACNP
ISSN journal
00255408
Volume
32
Issue
7
Year of publication
1997
Pages
831 - 837
Database
ISI
SICI code
0025-5408(1997)32:7<831:GMILF->2.0.ZU;2-B
Abstract
Nonmagnetic Ti4+ ion is substituted for Mn4+ in La0.6Pb0.4MnO3. The re sulting La0.6Pb0.4Mn(1-x)TixO3 (0 less than or equal to x less than or equal to 0.3) crystallizes in rhombohedral structure. The insulator-t o-metal transition temperature decreases from 320 K to 92 K as x is va ried 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. Magnetoresi stance at 6 T is enhanced from 38% for x = 0 to 75% for x = 0.07. The presence of Ti4+ (d(0)) ion decreases the Mn-Mn interaction through ox ygen and thereby affects the resistivity and magnetoresistance of La0. 6Pb0.4MnO3. (C) 1997 Elsevier Science Ltd.