Magnetic exchange interactions induced by Cr-doping in perovskite manganites

Chang Seop Hong; Nam Hwi Hur; Yong Nam Choi

doi:10.1016/j.ssc.2004.12.010

Magnetic exchange interactions induced by Cr-doping in perovskite manganites

Chang Seop Hong, Nam Hwi Hur, Yong Nam Choi

Department of Chemistry

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

16 Citations (Scopus)

Abstract

The effect of Cr-doping on the structural, magnetic and transport properties of perovskite manganites La_0.8Ca_0.2Mn _1-xCr_xO₃ (0≤x≤0.7) has been investigated. The Curie temperature (T_C) of the Cr-doped samples is almost unchanged up to 30% of Cr-doping. The Cr-doped samples, however, undergo a transition from the parent metallic state to the insulating state below T _C. The dc and ac magnetization data suggest that ferromagnetic clusters induced by double exchange interaction between Cr³⁺ and Mn³⁺ ions and antiferromagnetic components driven by Cr ³⁺/Mn⁴⁺ and Cr³⁺/Cr³⁺ interactions are present in the Cr-doped system, which is supported by comparative studies on magnetic and transport properties of LaMnO_3+δ and LaMn _0.75Cr_0.25O_3+δ.

Original language	English
Pages (from-to)	531-536
Number of pages	6
Journal	Solid State Communications
Volume	133
Issue number	8
DOIs	https://doi.org/10.1016/j.ssc.2004.12.010
Publication status	Published - 2005 Feb

Keywords

A. Magnetically ordered materials
A. Perovskite manganites
D. Colossal magnetoresistance

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2004.12.010

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title = "Magnetic exchange interactions induced by Cr-doping in perovskite manganites",

abstract = "The effect of Cr-doping on the structural, magnetic and transport properties of perovskite manganites La0.8Ca0.2Mn 1-xCrxO3 (0≤x≤0.7) has been investigated. The Curie temperature (TC) of the Cr-doped samples is almost unchanged up to 30% of Cr-doping. The Cr-doped samples, however, undergo a transition from the parent metallic state to the insulating state below T C. The dc and ac magnetization data suggest that ferromagnetic clusters induced by double exchange interaction between Cr3+ and Mn3+ ions and antiferromagnetic components driven by Cr 3+/Mn4+ and Cr3+/Cr3+ interactions are present in the Cr-doped system, which is supported by comparative studies on magnetic and transport properties of LaMnO3+δ and LaMn 0.75Cr0.25O3+δ.",

keywords = "A. Magnetically ordered materials, A. Perovskite manganites, D. Colossal magnetoresistance",

author = "Hong, {Chang Seop} and Hur, {Nam Hwi} and Choi, {Yong Nam}",

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T1 - Magnetic exchange interactions induced by Cr-doping in perovskite manganites

AU - Hong, Chang Seop

AU - Hur, Nam Hwi

AU - Choi, Yong Nam

PY - 2005/2

Y1 - 2005/2

N2 - The effect of Cr-doping on the structural, magnetic and transport properties of perovskite manganites La0.8Ca0.2Mn 1-xCrxO3 (0≤x≤0.7) has been investigated. The Curie temperature (TC) of the Cr-doped samples is almost unchanged up to 30% of Cr-doping. The Cr-doped samples, however, undergo a transition from the parent metallic state to the insulating state below T C. The dc and ac magnetization data suggest that ferromagnetic clusters induced by double exchange interaction between Cr3+ and Mn3+ ions and antiferromagnetic components driven by Cr 3+/Mn4+ and Cr3+/Cr3+ interactions are present in the Cr-doped system, which is supported by comparative studies on magnetic and transport properties of LaMnO3+δ and LaMn 0.75Cr0.25O3+δ.

AB - The effect of Cr-doping on the structural, magnetic and transport properties of perovskite manganites La0.8Ca0.2Mn 1-xCrxO3 (0≤x≤0.7) has been investigated. The Curie temperature (TC) of the Cr-doped samples is almost unchanged up to 30% of Cr-doping. The Cr-doped samples, however, undergo a transition from the parent metallic state to the insulating state below T C. The dc and ac magnetization data suggest that ferromagnetic clusters induced by double exchange interaction between Cr3+ and Mn3+ ions and antiferromagnetic components driven by Cr 3+/Mn4+ and Cr3+/Cr3+ interactions are present in the Cr-doped system, which is supported by comparative studies on magnetic and transport properties of LaMnO3+δ and LaMn 0.75Cr0.25O3+δ.

KW - A. Magnetically ordered materials

KW - A. Perovskite manganites

KW - D. Colossal magnetoresistance

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DO - 10.1016/j.ssc.2004.12.010

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JO - Solid State Communications

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ER -

Magnetic exchange interactions induced by Cr-doping in perovskite manganites

Abstract

Keywords

ASJC Scopus subject areas

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