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

doi:10.1063/1.1580650

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

Not published at VTT

Indian Association for the Cultivation of Science

Research output: Contribution to journal › Article › Scientific › peer-review

70 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 language	English
Article number	4101
Journal	Applied Physics Letters
Volume	82
DOIs	https://doi.org/10.1063/1.1580650
Publication status	Published - 2003
MoE publication type	A1 Journal article-refereed

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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",

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publisher = "American Institute of Physics (AIP)",

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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

SN - 0003-6951

VL - 82

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 4101

ER -

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

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