Synthesis and colossal magnetoresistance effect of layered perovskites Sm2-2xSr1+2xMn2O7 (x = 0.2, 0.4, 0.5)

J. W. Liu; G. Chen; Z. H. Li; Z. Lü; Z. G. Zhang

doi:10.1016/j.matchemphys.2007.04.042

Synthesis and colossal magnetoresistance effect of layered perovskites Sm_2-2xSr_1+2xMn₂O₇ (x = 0.2, 0.4, 0.5)

J. W. Liu
, G. Chen^*
, Z. H. Li
, Z. Lü
, Z. G. Zhang

^*Corresponding author for this work

Harbin Institute of Technology
Harbin Normal University

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

7 Scopus citations

Abstract

Polycrystalline layered perovskite manganites Sm_2-2xSr_1+2xMn₂O₇ (x = 0.2, 0.4, 0.5) were synthesized by the citrate-gel method. Their magnetic and electric properties were investigated. The samples with x = 0.4 and 0.5 show insulating behavior. However, a metal-insulator (M-I) transition is observed for x = 0.2. The maximum value of MR [ρ(0) - ρ(H)]/ρ(0) × 100%] for x = 0.2 is 89.88% (105 K, 5 T) and 66.36% (105 K, 2 T). The MR is efficiently decreased from 57.62% (105 K, 5 T) for x = 0.4 to 33.44% (105 K, 5 T) for x = 0.5. Moreover, the Curie temperature (T_c) decreases with increasing x.

Original language	English
Pages (from-to)	185-188
Number of pages	4
Journal	Materials Chemistry and Physics
Volume	105
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2007.04.042
State	Published - 15 Oct 2007

Keywords

Magnetic
Magnetoresistance
Ruddlesden-Popper phase

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@article{89699596df684fc99c1ecd8c07c507da,

title = "Synthesis and colossal magnetoresistance effect of layered perovskites Sm2-2xSr1+2xMn2O7 (x = 0.2, 0.4, 0.5)",

abstract = "Polycrystalline layered perovskite manganites Sm2-2xSr1+2xMn2O7 (x = 0.2, 0.4, 0.5) were synthesized by the citrate-gel method. Their magnetic and electric properties were investigated. The samples with x = 0.4 and 0.5 show insulating behavior. However, a metal-insulator (M-I) transition is observed for x = 0.2. The maximum value of MR [ρ(0) - ρ(H)]/ρ(0) × 100\%] for x = 0.2 is 89.88\% (105 K, 5 T) and 66.36\% (105 K, 2 T). The MR is efficiently decreased from 57.62\% (105 K, 5 T) for x = 0.4 to 33.44\% (105 K, 5 T) for x = 0.5. Moreover, the Curie temperature (Tc) decreases with increasing x.",

keywords = "Magnetic, Magnetoresistance, Ruddlesden-Popper phase",

author = "Liu, \{J. W.\} and G. Chen and Li, \{Z. H.\} and Z. L{\"u} and Zhang, \{Z. G.\}",

year = "2007",

month = oct,

day = "15",

doi = "10.1016/j.matchemphys.2007.04.042",

language = "英语",

volume = "105",

pages = "185--188",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier B.V.",

number = "2-3",

}

TY - JOUR

T1 - Synthesis and colossal magnetoresistance effect of layered perovskites Sm2-2xSr1+2xMn2O7 (x = 0.2, 0.4, 0.5)

AU - Liu, J. W.

AU - Chen, G.

AU - Li, Z. H.

AU - Lü, Z.

AU - Zhang, Z. G.

PY - 2007/10/15

Y1 - 2007/10/15

N2 - Polycrystalline layered perovskite manganites Sm2-2xSr1+2xMn2O7 (x = 0.2, 0.4, 0.5) were synthesized by the citrate-gel method. Their magnetic and electric properties were investigated. The samples with x = 0.4 and 0.5 show insulating behavior. However, a metal-insulator (M-I) transition is observed for x = 0.2. The maximum value of MR [ρ(0) - ρ(H)]/ρ(0) × 100%] for x = 0.2 is 89.88% (105 K, 5 T) and 66.36% (105 K, 2 T). The MR is efficiently decreased from 57.62% (105 K, 5 T) for x = 0.4 to 33.44% (105 K, 5 T) for x = 0.5. Moreover, the Curie temperature (Tc) decreases with increasing x.

AB - Polycrystalline layered perovskite manganites Sm2-2xSr1+2xMn2O7 (x = 0.2, 0.4, 0.5) were synthesized by the citrate-gel method. Their magnetic and electric properties were investigated. The samples with x = 0.4 and 0.5 show insulating behavior. However, a metal-insulator (M-I) transition is observed for x = 0.2. The maximum value of MR [ρ(0) - ρ(H)]/ρ(0) × 100%] for x = 0.2 is 89.88% (105 K, 5 T) and 66.36% (105 K, 2 T). The MR is efficiently decreased from 57.62% (105 K, 5 T) for x = 0.4 to 33.44% (105 K, 5 T) for x = 0.5. Moreover, the Curie temperature (Tc) decreases with increasing x.

KW - Magnetic

KW - Magnetoresistance

KW - Ruddlesden-Popper phase

UR - https://www.scopus.com/pages/publications/34548379908

U2 - 10.1016/j.matchemphys.2007.04.042

DO - 10.1016/j.matchemphys.2007.04.042

M3 - 文章

AN - SCOPUS:34548379908

SN - 0254-0584

VL - 105

SP - 185

EP - 188

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Synthesis and colossal magnetoresistance effect of layered perovskites Sm_2-2xSr_1+2xMn₂O₇ (x = 0.2, 0.4, 0.5)

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Keywords

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