Observation of low field magnetoresistance in the layered manganite Sr1.6Sm1.4Mn2O7

N. H. Hur; E. O. Chi; Y. U. Kwon; J. Yu; J. T. Kim; Y. K. Park; J. C. Park

doi:10.1016/S0038-1098(99)00315-4

Observation of low field magnetoresistance in the layered manganite Sr_1.6Sm_1.4Mn₂O₇

N. H. Hur, E. O. Chi, Y. U. Kwon, J. Yu, J. T. Kim, Y. K. Park, J. C. Park

Department of Chemistry

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15 Scopus citations

Abstract

The structural, transport, and magnetic properties of the naturally layered manganese oxide, Sr_1.6Sm_1.4Mn₂O₇ (Sm-327), which consists of two [MnO₂] bi-layers intertwined with a rock-salt type layer of [(Sr,Sm)₂O₂] have been investigated. Both a sharp metal-insulator (M-I) transition and an antiferromagnetic transition were found to occur simultaneously at about 118 K. Even in the absence of ferromagnetic ordering the resistance is suppressed remarkably upon applying a magnetic field. These results suggest that the M-I transition and colossal magnetoresistance behavior observed in Sm-327 are not driven mainly by the double exchange mechanism but ascribed rather to the canted antiferromagnetic spin configurations of [MnO₂] bi-layers, which eventually leads to the field-induced ferromagnetic ordering.

Original language	English
Pages (from-to)	61-65
Number of pages	5
Journal	Solid State Communications
Volume	112
Issue number	2
DOIs	https://doi.org/10.1016/S0038-1098(99)00315-4
State	Published - 6 Sep 1999

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title = "Observation of low field magnetoresistance in the layered manganite Sr1.6Sm1.4Mn2O7",

abstract = "The structural, transport, and magnetic properties of the naturally layered manganese oxide, Sr1.6Sm1.4Mn2O7 (Sm-327), which consists of two [MnO2] bi-layers intertwined with a rock-salt type layer of [(Sr,Sm)2O2] have been investigated. Both a sharp metal-insulator (M-I) transition and an antiferromagnetic transition were found to occur simultaneously at about 118 K. Even in the absence of ferromagnetic ordering the resistance is suppressed remarkably upon applying a magnetic field. These results suggest that the M-I transition and colossal magnetoresistance behavior observed in Sm-327 are not driven mainly by the double exchange mechanism but ascribed rather to the canted antiferromagnetic spin configurations of [MnO2] bi-layers, which eventually leads to the field-induced ferromagnetic ordering.",

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T1 - Observation of low field magnetoresistance in the layered manganite Sr1.6Sm1.4Mn2O7

AU - Hur, N. H.

AU - Chi, E. O.

AU - Kwon, Y. U.

AU - Yu, J.

AU - Kim, J. T.

AU - Park, Y. K.

AU - Park, J. C.

PY - 1999/9/6

Y1 - 1999/9/6

N2 - The structural, transport, and magnetic properties of the naturally layered manganese oxide, Sr1.6Sm1.4Mn2O7 (Sm-327), which consists of two [MnO2] bi-layers intertwined with a rock-salt type layer of [(Sr,Sm)2O2] have been investigated. Both a sharp metal-insulator (M-I) transition and an antiferromagnetic transition were found to occur simultaneously at about 118 K. Even in the absence of ferromagnetic ordering the resistance is suppressed remarkably upon applying a magnetic field. These results suggest that the M-I transition and colossal magnetoresistance behavior observed in Sm-327 are not driven mainly by the double exchange mechanism but ascribed rather to the canted antiferromagnetic spin configurations of [MnO2] bi-layers, which eventually leads to the field-induced ferromagnetic ordering.

AB - The structural, transport, and magnetic properties of the naturally layered manganese oxide, Sr1.6Sm1.4Mn2O7 (Sm-327), which consists of two [MnO2] bi-layers intertwined with a rock-salt type layer of [(Sr,Sm)2O2] have been investigated. Both a sharp metal-insulator (M-I) transition and an antiferromagnetic transition were found to occur simultaneously at about 118 K. Even in the absence of ferromagnetic ordering the resistance is suppressed remarkably upon applying a magnetic field. These results suggest that the M-I transition and colossal magnetoresistance behavior observed in Sm-327 are not driven mainly by the double exchange mechanism but ascribed rather to the canted antiferromagnetic spin configurations of [MnO2] bi-layers, which eventually leads to the field-induced ferromagnetic ordering.

UR - https://www.scopus.com/pages/publications/0032592933

U2 - 10.1016/S0038-1098(99)00315-4

DO - 10.1016/S0038-1098(99)00315-4

M3 - Article

AN - SCOPUS:0032592933

SN - 0038-1098

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SP - 61

EP - 65

JO - Solid State Communications

JF - Solid State Communications

IS - 2

ER -

Observation of low field magnetoresistance in the layered manganite Sr_1.6Sm_1.4Mn₂O₇

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