Structural, electrical and magnetic properties of two-dimensional La1.2(Sr1.8-xCax)Mn2O7 manganites

C. H. Shen; R. S. Liu; S. F. Hu; J. G. Lin; C. Y. Huang; H. S. Sheu

doi:10.1063/1.371027

Structural, electrical and magnetic properties of two-dimensional La_1.2(Sr_1.8-xCa_x)Mn₂O₇ manganites

C. H. Shen, R. S. Liu^*, S. F. Hu, J. G. Lin, C. Y. Huang, H. S. Sheu

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

The effects of structural, electrical and magnetic properties with the isovalent chemical substitution of Ca²⁺ into the Sr²⁺ sites in La_1.2(Sr_1.8-xCa_x)Mn₂O₇ (x = 0-0.8) are investigated. The highest magnetoresistance ratio [ρ(0)/ρ(H)] of 208% (H = 1.5 T) at a temperature of 102 K was observed for the x = 0.4 sample. The Curie temperatures decreased from 135 to 102 K for x = 0-0.4, respectively. Moreover, the Weiss constants θ were varied from the positive to negative value with increasing Ca concentration. The antiferromagnetic behavior with Néel temperature around 30 K was found in the x = 0.8 sample. The magnetization measurements show that the hysteresis phenomenon appeared at the temperatures below the Curie or Néel temperatures.

Original language	English
Pages (from-to)	2178-2184
Number of pages	7
Journal	Journal of Applied Physics
Volume	86
Issue number	4
DOIs	https://doi.org/10.1063/1.371027
Publication status	Published - 1999 Aug 15
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Structural, electrical and magnetic properties of two-dimensional La1.2(Sr1.8-xCax)Mn2O7 manganites",

abstract = "The effects of structural, electrical and magnetic properties with the isovalent chemical substitution of Ca2+ into the Sr2+ sites in La1.2(Sr1.8-xCax)Mn2O7 (x = 0-0.8) are investigated. The highest magnetoresistance ratio [ρ(0)/ρ(H)] of 208% (H = 1.5 T) at a temperature of 102 K was observed for the x = 0.4 sample. The Curie temperatures decreased from 135 to 102 K for x = 0-0.4, respectively. Moreover, the Weiss constants θ were varied from the positive to negative value with increasing Ca concentration. The antiferromagnetic behavior with N{\'e}el temperature around 30 K was found in the x = 0.8 sample. The magnetization measurements show that the hysteresis phenomenon appeared at the temperatures below the Curie or N{\'e}el temperatures.",

author = "Shen, {C. H.} and Liu, {R. S.} and Hu, {S. F.} and Lin, {J. G.} and Huang, {C. Y.} and Sheu, {H. S.}",

year = "1999",

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T1 - Structural, electrical and magnetic properties of two-dimensional La1.2(Sr1.8-xCax)Mn2O7 manganites

AU - Shen, C. H.

AU - Liu, R. S.

AU - Hu, S. F.

AU - Lin, J. G.

AU - Huang, C. Y.

AU - Sheu, H. S.

PY - 1999/8/15

Y1 - 1999/8/15

N2 - The effects of structural, electrical and magnetic properties with the isovalent chemical substitution of Ca2+ into the Sr2+ sites in La1.2(Sr1.8-xCax)Mn2O7 (x = 0-0.8) are investigated. The highest magnetoresistance ratio [ρ(0)/ρ(H)] of 208% (H = 1.5 T) at a temperature of 102 K was observed for the x = 0.4 sample. The Curie temperatures decreased from 135 to 102 K for x = 0-0.4, respectively. Moreover, the Weiss constants θ were varied from the positive to negative value with increasing Ca concentration. The antiferromagnetic behavior with Néel temperature around 30 K was found in the x = 0.8 sample. The magnetization measurements show that the hysteresis phenomenon appeared at the temperatures below the Curie or Néel temperatures.

AB - The effects of structural, electrical and magnetic properties with the isovalent chemical substitution of Ca2+ into the Sr2+ sites in La1.2(Sr1.8-xCax)Mn2O7 (x = 0-0.8) are investigated. The highest magnetoresistance ratio [ρ(0)/ρ(H)] of 208% (H = 1.5 T) at a temperature of 102 K was observed for the x = 0.4 sample. The Curie temperatures decreased from 135 to 102 K for x = 0-0.4, respectively. Moreover, the Weiss constants θ were varied from the positive to negative value with increasing Ca concentration. The antiferromagnetic behavior with Néel temperature around 30 K was found in the x = 0.8 sample. The magnetization measurements show that the hysteresis phenomenon appeared at the temperatures below the Curie or Néel temperatures.

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Structural, electrical and magnetic properties of two-dimensional La_1.2(Sr_1.8-xCa_x)Mn₂O₇ manganites

Abstract

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