Adiabatic and non-adiabatic hopping conduction in La-Pb-Mn-O type system

A. Banerjee; S. Pal; E. Rozenberg; B. K. Chaudhuri

doi:10.1016/S0925-8388(01)01229-4

Adiabatic and non-adiabatic hopping conduction in La-Pb-Mn-O type system

A. Banerjee, S. Pal, E. Rozenberg, B. K. Chaudhuri

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Magnetic field dependent resistivity (ρ) and Seebeck coefficient (S) of La_1-xPb_xMnO₃ (x=0.0-0.5), prepared by sol-gel method, have been reported. One set (LaMnO_3+δ) sample, termed as LCON, was found to show insulator (semiconductor) to metal transition (MIT) around T_p∼265 K and the other set (LaMnO₃), termed as LSEM, did not show such transition. T_p shifts to the lower temperature under magnetic field. It has been shown, for the first time, that both in presence or in absence of magnetic field, two different transport mechanisms (adiabatic and non-adiabatic) are followed, respectively, by LSEM and LCON (for T>T_p). Like resistivity, S of the sample was also found to depend on the applied magnetic field particularly around T_p. The samples showing no MIT indicated larger Debye temperatures and electron-phonon interaction constants (γ_p) than those of the sample showing MIT. Both ρ and S of La_1-xPb_xMnO₃ (x=0.0-0.5) behave similarly to those of LCON.

Original language	English
Pages (from-to)	85-88
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	326
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(01)01229-4
State	Published - 9 Aug 2001
Event	Proceedings of the International on Magnetic Materials - Calcutta, India Duration: 17 Oct 2000 → 19 Oct 2000

Keywords

Giant magnetoresistance
Hopping conduction
Sol-gel

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0925-8388(01)01229-4

Cite this

@article{cc715e4141c84eeb9f0c4acb371345c5,

title = "Adiabatic and non-adiabatic hopping conduction in La-Pb-Mn-O type system",

abstract = "Magnetic field dependent resistivity (ρ) and Seebeck coefficient (S) of La1-xPbxMnO3 (x=0.0-0.5), prepared by sol-gel method, have been reported. One set (LaMnO3+δ) sample, termed as LCON, was found to show insulator (semiconductor) to metal transition (MIT) around Tp∼265 K and the other set (LaMnO3), termed as LSEM, did not show such transition. Tp shifts to the lower temperature under magnetic field. It has been shown, for the first time, that both in presence or in absence of magnetic field, two different transport mechanisms (adiabatic and non-adiabatic) are followed, respectively, by LSEM and LCON (for T>Tp). Like resistivity, S of the sample was also found to depend on the applied magnetic field particularly around Tp. The samples showing no MIT indicated larger Debye temperatures and electron-phonon interaction constants (γp) than those of the sample showing MIT. Both ρ and S of La1-xPbxMnO3 (x=0.0-0.5) behave similarly to those of LCON.",

keywords = "Giant magnetoresistance, Hopping conduction, Sol-gel",

author = "A. Banerjee and S. Pal and E. Rozenberg and Chaudhuri, {B. K.}",

note = "Funding Information: The authors are grateful to the Department of Science and Technology, Government of India for financial support. ; Proceedings of the International on Magnetic Materials ; Conference date: 17-10-2000 Through 19-10-2000",

year = "2001",

month = aug,

day = "9",

doi = "10.1016/S0925-8388(01)01229-4",

language = "English",

volume = "326",

pages = "85--88",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Adiabatic and non-adiabatic hopping conduction in La-Pb-Mn-O type system

AU - Banerjee, A.

AU - Pal, S.

AU - Rozenberg, E.

AU - Chaudhuri, B. K.

N1 - Funding Information: The authors are grateful to the Department of Science and Technology, Government of India for financial support.

PY - 2001/8/9

Y1 - 2001/8/9

N2 - Magnetic field dependent resistivity (ρ) and Seebeck coefficient (S) of La1-xPbxMnO3 (x=0.0-0.5), prepared by sol-gel method, have been reported. One set (LaMnO3+δ) sample, termed as LCON, was found to show insulator (semiconductor) to metal transition (MIT) around Tp∼265 K and the other set (LaMnO3), termed as LSEM, did not show such transition. Tp shifts to the lower temperature under magnetic field. It has been shown, for the first time, that both in presence or in absence of magnetic field, two different transport mechanisms (adiabatic and non-adiabatic) are followed, respectively, by LSEM and LCON (for T>Tp). Like resistivity, S of the sample was also found to depend on the applied magnetic field particularly around Tp. The samples showing no MIT indicated larger Debye temperatures and electron-phonon interaction constants (γp) than those of the sample showing MIT. Both ρ and S of La1-xPbxMnO3 (x=0.0-0.5) behave similarly to those of LCON.

AB - Magnetic field dependent resistivity (ρ) and Seebeck coefficient (S) of La1-xPbxMnO3 (x=0.0-0.5), prepared by sol-gel method, have been reported. One set (LaMnO3+δ) sample, termed as LCON, was found to show insulator (semiconductor) to metal transition (MIT) around Tp∼265 K and the other set (LaMnO3), termed as LSEM, did not show such transition. Tp shifts to the lower temperature under magnetic field. It has been shown, for the first time, that both in presence or in absence of magnetic field, two different transport mechanisms (adiabatic and non-adiabatic) are followed, respectively, by LSEM and LCON (for T>Tp). Like resistivity, S of the sample was also found to depend on the applied magnetic field particularly around Tp. The samples showing no MIT indicated larger Debye temperatures and electron-phonon interaction constants (γp) than those of the sample showing MIT. Both ρ and S of La1-xPbxMnO3 (x=0.0-0.5) behave similarly to those of LCON.

KW - Giant magnetoresistance

KW - Hopping conduction

KW - Sol-gel

UR - http://www.scopus.com/inward/record.url?scp=0035833606&partnerID=8YFLogxK

U2 - 10.1016/S0925-8388(01)01229-4

DO - 10.1016/S0925-8388(01)01229-4

M3 - Conference article

AN - SCOPUS:0035833606

SN - 0925-8388

VL - 326

SP - 85

EP - 88

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

T2 - Proceedings of the International on Magnetic Materials

Y2 - 17 October 2000 through 19 October 2000

ER -

Adiabatic and non-adiabatic hopping conduction in La-Pb-Mn-O type system

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this