Effect of Li doping on the magnetotransport properties of La0.7Ca0.3-yLiyMnO3 system: Decrease of metal-insulator transition temperature

S Bhattacharya, RK Mukherjee, BK Chaudhuri, HD Yang

Research output: Contribution to journalArticleScientificpeer-review

57 Citations (Scopus)

Abstract

With increasing the Li doping level in La0.7Ca0.3−yLiyMnO3 (0⩽y⩽0.3), the system is driven from a higher-conductivity regime to a lower-conductivity regime, which is in sharp contrast with the behavior of Na or K doping. Compared to those of K or Na, the ionic radius of Li is much smaller than that of Ca. Therefore, substitution of Ca by Li results in a smaller average A-site radius, narrowing the bandwidth and hence enhancing the band gap and resistivity. The effect of random disorder of La3+ and A2+ also plays an important role leading to charge localization.
Original languageEnglish
Article number4101
JournalApplied Physics Letters
Volume82
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

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transition temperature
insulators
low conductivity
radii
metals
disorders
substitutes
bandwidth
conductivity
electrical resistivity

Cite this

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title = "Effect of Li doping on the magnetotransport properties of La0.7Ca0.3-yLiyMnO3 system: Decrease of metal-insulator transition temperature",
abstract = "With increasing the Li doping level in La0.7Ca0.3−yLiyMnO3 (0⩽y⩽0.3), the system is driven from a higher-conductivity regime to a lower-conductivity regime, which is in sharp contrast with the behavior of Na or K doping. Compared to those of K or Na, the ionic radius of Li is much smaller than that of Ca. Therefore, substitution of Ca by Li results in a smaller average A-site radius, narrowing the bandwidth and hence enhancing the band gap and resistivity. The effect of random disorder of La3+ and A2+ also plays an important role leading to charge localization.",
author = "S Bhattacharya and RK Mukherjee and BK Chaudhuri and HD Yang",
year = "2003",
doi = "10.1063/1.1580650",
language = "English",
volume = "82",
journal = "Applied Physics Letters",
issn = "0003-6951",

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Effect of Li doping on the magnetotransport properties of La0.7Ca0.3-yLiyMnO3 system: Decrease of metal-insulator transition temperature. / Bhattacharya, S; Mukherjee, RK; Chaudhuri, BK; Yang, HD.

In: Applied Physics Letters, Vol. 82, 4101, 2003.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of Li doping on the magnetotransport properties of La0.7Ca0.3-yLiyMnO3 system: Decrease of metal-insulator transition temperature

AU - Bhattacharya, S

AU - Mukherjee, RK

AU - Chaudhuri, BK

AU - Yang, HD

PY - 2003

Y1 - 2003

N2 - With increasing the Li doping level in La0.7Ca0.3−yLiyMnO3 (0⩽y⩽0.3), the system is driven from a higher-conductivity regime to a lower-conductivity regime, which is in sharp contrast with the behavior of Na or K doping. Compared to those of K or Na, the ionic radius of Li is much smaller than that of Ca. Therefore, substitution of Ca by Li results in a smaller average A-site radius, narrowing the bandwidth and hence enhancing the band gap and resistivity. The effect of random disorder of La3+ and A2+ also plays an important role leading to charge localization.

AB - With increasing the Li doping level in La0.7Ca0.3−yLiyMnO3 (0⩽y⩽0.3), the system is driven from a higher-conductivity regime to a lower-conductivity regime, which is in sharp contrast with the behavior of Na or K doping. Compared to those of K or Na, the ionic radius of Li is much smaller than that of Ca. Therefore, substitution of Ca by Li results in a smaller average A-site radius, narrowing the bandwidth and hence enhancing the band gap and resistivity. The effect of random disorder of La3+ and A2+ also plays an important role leading to charge localization.

U2 - 10.1063/1.1580650

DO - 10.1063/1.1580650

M3 - Article

VL - 82

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

M1 - 4101

ER -