Magneto-transport and specific heat behavior of Cd-doped La 0.5Ca0.5MnO3

K. F. Wang; Q. Xiao; H. Yu; M. Zeng; M. F. Zhang; J. M. Liu

doi:10.1016/j.jmmm.2004.07.026

Magneto-transport and specific heat behavior of Cd-doped La _0.5Ca_0.5MnO₃

K. F. Wang, Q. Xiao, H. Yu, M. Zeng, M. F. Zhang, J. M. Liu^*

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

The temperature-dependent magneto-transport properties and the specific heat of La_0.5(Ca_0.5-xCd_x)MnO₃ (x = 0.0-0.5) are measured for understanding the electronic phase separation behaviors in manganites. It is surprising to observe that Cd-doping enhances the ferromagnetic metallic state and suppresses the insulating state. Two insulator-metal transitions in La_0.5(Ca_0.3Cd _0.2)MnO₃ are observed, one occurs at temperature T _p1 in accordance with the observed paramagnetic-ferromagnetic transition point T_c and the other appears at a lower temperature T_P2. The magnetoresistance of La_0.5(Ca _0.3Cd_0.2)MnO₃ as a function of temperature shows a sharp peak around T_C, and remains roughly unchanged over a wide temperature range below T_P1. It is argued that these fantastic properties are attributed to the coexistence of ferromagnetic metallic state and ferromagnetic insulating state under an antiferromagnetic background due to the Cd-doping effect.

Original language	English
Pages (from-to)	130-137
Number of pages	8
Journal	Journal of Magnetism and Magnetic Materials
Volume	285
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jmmm.2004.07.026
Publication status	Published - Jan 2005
Externally published	Yes

Keywords

Colossal magnetoresistance
Electronic phase separation
Manganites

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10.1016/j.jmmm.2004.07.026

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title = "Magneto-transport and specific heat behavior of Cd-doped La 0.5Ca0.5MnO3",

abstract = "The temperature-dependent magneto-transport properties and the specific heat of La0.5(Ca0.5-xCdx)MnO3 (x = 0.0-0.5) are measured for understanding the electronic phase separation behaviors in manganites. It is surprising to observe that Cd-doping enhances the ferromagnetic metallic state and suppresses the insulating state. Two insulator-metal transitions in La0.5(Ca0.3Cd 0.2)MnO3 are observed, one occurs at temperature T p1 in accordance with the observed paramagnetic-ferromagnetic transition point Tc and the other appears at a lower temperature TP2. The magnetoresistance of La0.5(Ca 0.3Cd0.2)MnO3 as a function of temperature shows a sharp peak around TC, and remains roughly unchanged over a wide temperature range below TP1. It is argued that these fantastic properties are attributed to the coexistence of ferromagnetic metallic state and ferromagnetic insulating state under an antiferromagnetic background due to the Cd-doping effect.",

keywords = "Colossal magnetoresistance, Electronic phase separation, Manganites",

author = "Wang, {K. F.} and Q. Xiao and H. Yu and M. Zeng and Zhang, {M. F.} and Liu, {J. M.}",

year = "2005",

month = jan,

doi = "10.1016/j.jmmm.2004.07.026",

language = "English",

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T1 - Magneto-transport and specific heat behavior of Cd-doped La 0.5Ca0.5MnO3

AU - Wang, K. F.

AU - Xiao, Q.

AU - Yu, H.

AU - Zeng, M.

AU - Zhang, M. F.

AU - Liu, J. M.

PY - 2005/1

Y1 - 2005/1

N2 - The temperature-dependent magneto-transport properties and the specific heat of La0.5(Ca0.5-xCdx)MnO3 (x = 0.0-0.5) are measured for understanding the electronic phase separation behaviors in manganites. It is surprising to observe that Cd-doping enhances the ferromagnetic metallic state and suppresses the insulating state. Two insulator-metal transitions in La0.5(Ca0.3Cd 0.2)MnO3 are observed, one occurs at temperature T p1 in accordance with the observed paramagnetic-ferromagnetic transition point Tc and the other appears at a lower temperature TP2. The magnetoresistance of La0.5(Ca 0.3Cd0.2)MnO3 as a function of temperature shows a sharp peak around TC, and remains roughly unchanged over a wide temperature range below TP1. It is argued that these fantastic properties are attributed to the coexistence of ferromagnetic metallic state and ferromagnetic insulating state under an antiferromagnetic background due to the Cd-doping effect.

AB - The temperature-dependent magneto-transport properties and the specific heat of La0.5(Ca0.5-xCdx)MnO3 (x = 0.0-0.5) are measured for understanding the electronic phase separation behaviors in manganites. It is surprising to observe that Cd-doping enhances the ferromagnetic metallic state and suppresses the insulating state. Two insulator-metal transitions in La0.5(Ca0.3Cd 0.2)MnO3 are observed, one occurs at temperature T p1 in accordance with the observed paramagnetic-ferromagnetic transition point Tc and the other appears at a lower temperature TP2. The magnetoresistance of La0.5(Ca 0.3Cd0.2)MnO3 as a function of temperature shows a sharp peak around TC, and remains roughly unchanged over a wide temperature range below TP1. It is argued that these fantastic properties are attributed to the coexistence of ferromagnetic metallic state and ferromagnetic insulating state under an antiferromagnetic background due to the Cd-doping effect.

KW - Colossal magnetoresistance

KW - Electronic phase separation

KW - Manganites

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U2 - 10.1016/j.jmmm.2004.07.026

DO - 10.1016/j.jmmm.2004.07.026

M3 - Article

AN - SCOPUS:10044241949

SN - 0304-8853

VL - 285

SP - 130

EP - 137

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

ER -

Magneto-transport and specific heat behavior of Cd-doped La _0.5Ca_0.5MnO₃

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Keywords

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