NOVEL CROSSOVER FROM A METALLIC TO AN INSULATING GROUND-STATE IN (LA0.5ND0.5)(0.67)CA0.33MNO3 BY INCREASING THE OXYGEN MASS

Authors
ZHAO GM KELLER H HOFER J SHENGELAYA A MULLER KA
Citation
Gm. Zhao et al., NOVEL CROSSOVER FROM A METALLIC TO AN INSULATING GROUND-STATE IN (LA0.5ND0.5)(0.67)CA0.33MNO3 BY INCREASING THE OXYGEN MASS, Solid state communications, 104(2), 1997, pp. 57-61
Citations number
29
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
104
Issue
2
Year of publication
1997
Pages
57 - 61
Database
ISI
SICI code
0038-1098(1997)104:2<57:NCFAMT>2.0.ZU;2-F
Abstract
Resistivity and magnetization measurements were performed on the manga nese-based perovskite (La0.5Nd0.5)(0.67)Ca0.33MnO3 which were exchange d by the O-16 and O-18 isotopes. There is a novel crossover from a met allic to an insulating ground-state by simply changing the oxygen isot ope from O-16 to O-18. Our results are consistent with a scenario in w hich the insulating behavior is caused by the presence of lattice and magnetic polarons (charge carriers dressed by both lattice distortions and spin polarizations) or a charge-ordered state. (C) 1997 Elsevier Science Ltd.