From double exchange to superexchange in charge-ordering perovskite manganites

Wei Bao; J. D. Axe; C. H. Chen; S. W. Cheong; P. Schiffer; M. Roy

doi:10.1016/S0921-4526(97)00607-8

From double exchange to superexchange in charge-ordering perovskite manganites

Wei Bao, J. D. Axe, C. H. Chen, S. W. Cheong, P. Schiffer, M. Roy

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

Abstract

We found dynamic ferromagnetic correlations at the room temperature in perovskite manganites which have an antiferromagnetic insulating ground state. They are replaced by antiferromagnetic correlations when the electrons order. Our results indicate that the double-exchange mechanism is turned off by electron localization at low temperatures.

Original language	English (US)
Pages (from-to)	418-420
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	241-243
DOIs	https://doi.org/10.1016/S0921-4526(97)00607-8
State	Published - 1997
Externally published	Yes

Keywords

Charge ordering
Colossal magnetoresistance
Double exchange
Paramagnetic fluctuations

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Online availability

10.1016/S0921-4526(97)00607-8

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@article{b6a36c96a09e4f5597ef5053eab0d3a4,

title = "From double exchange to superexchange in charge-ordering perovskite manganites",

abstract = "We found dynamic ferromagnetic correlations at the room temperature in perovskite manganites which have an antiferromagnetic insulating ground state. They are replaced by antiferromagnetic correlations when the electrons order. Our results indicate that the double-exchange mechanism is turned off by electron localization at low temperatures.",

keywords = "Charge ordering, Colossal magnetoresistance, Double exchange, Paramagnetic fluctuations",

author = "Wei Bao and Axe, {J. D.} and Chen, {C. H.} and Cheong, {S. W.} and P. Schiffer and M. Roy",

note = "Funding Information: We thank S.M. Shapiro, G. Shirane, C. Broholm, A.P. Ramirez, G.Y. Xu, P. Woodward, P. Little-wood, A.J. Millis, C.M. Varma, H.Y. Hwang, B. Batlogg for discussions. Work at BNL was supported by DOE under Contract No DE-AC02-76CH00016.",

year = "1997",

doi = "10.1016/S0921-4526(97)00607-8",

language = "English (US)",

volume = "241-243",

pages = "418--420",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - From double exchange to superexchange in charge-ordering perovskite manganites

AU - Bao, Wei

AU - Axe, J. D.

AU - Chen, C. H.

AU - Cheong, S. W.

AU - Schiffer, P.

AU - Roy, M.

N1 - Funding Information: We thank S.M. Shapiro, G. Shirane, C. Broholm, A.P. Ramirez, G.Y. Xu, P. Woodward, P. Little-wood, A.J. Millis, C.M. Varma, H.Y. Hwang, B. Batlogg for discussions. Work at BNL was supported by DOE under Contract No DE-AC02-76CH00016.

PY - 1997

Y1 - 1997

N2 - We found dynamic ferromagnetic correlations at the room temperature in perovskite manganites which have an antiferromagnetic insulating ground state. They are replaced by antiferromagnetic correlations when the electrons order. Our results indicate that the double-exchange mechanism is turned off by electron localization at low temperatures.

AB - We found dynamic ferromagnetic correlations at the room temperature in perovskite manganites which have an antiferromagnetic insulating ground state. They are replaced by antiferromagnetic correlations when the electrons order. Our results indicate that the double-exchange mechanism is turned off by electron localization at low temperatures.

KW - Charge ordering

KW - Colossal magnetoresistance

KW - Double exchange

KW - Paramagnetic fluctuations

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U2 - 10.1016/S0921-4526(97)00607-8

DO - 10.1016/S0921-4526(97)00607-8

M3 - Article

AN - SCOPUS:11544353018

SN - 0921-4526

VL - 241-243

SP - 418

EP - 420

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

From double exchange to superexchange in charge-ordering perovskite manganites

Abstract

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