Phase separation region in the phase diagram of polycrystalline Pr0.65Ca0.35-xSrxMnO3

D. Niebieskikwiat; R. D. Sánchez; A. Caneiro

doi:10.1016/S0304-8853(01)00696-5

Phase separation region in the phase diagram of polycrystalline Pr_0.65Ca_0.35-xSr_xMnO₃

D. Niebieskikwiat^*
, R. D. Sánchez
, A. Caneiro

^*Corresponding author for this work

Instituto Bolseiro

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

20 Scopus citations

Abstract

We have performed measurements of thermoelectric power, electrical resistivity and DC magnetization in polycrystalline samples of Pr_0.65Ca_0.35-xSr_xMnO₃ with x = 0, 0.02, 0.05, 0.10 and 0.20. The system presents an evolution from a charge-ordered manganite at x = 0, with an insulating-like resistivity and low magnetization values, towards a ferromagnetic (FM) metallic state for x = 0.20. We show that in the intermediate region a strong competition between the FM double-exchange and the localized charge-ordering occurs, inducing the phase segregation of the two competing states in a wide temperature range. We estimate the temperature (T) evolution of the FM phase fraction of the x = 0.10 sample and construct a complete T-x phase diagram.

Original language	English
Pages (from-to)	241-249
Number of pages	9
Journal	Journal of Magnetism and Magnetic Materials
Volume	237
Issue number	3
DOIs	https://doi.org/10.1016/S0304-8853(01)00696-5
State	Published - Dec 2001
Externally published	Yes

Keywords

Magnetic ordering
Magnetoresistance
Phase separation

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10.1016/S0304-8853(01)00696-5

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@article{4576a32510e54991a62365115dd9b540,

title = "Phase separation region in the phase diagram of polycrystalline Pr0.65Ca0.35-xSrxMnO3",

abstract = "We have performed measurements of thermoelectric power, electrical resistivity and DC magnetization in polycrystalline samples of Pr0.65Ca0.35-xSrxMnO3 with x = 0, 0.02, 0.05, 0.10 and 0.20. The system presents an evolution from a charge-ordered manganite at x = 0, with an insulating-like resistivity and low magnetization values, towards a ferromagnetic (FM) metallic state for x = 0.20. We show that in the intermediate region a strong competition between the FM double-exchange and the localized charge-ordering occurs, inducing the phase segregation of the two competing states in a wide temperature range. We estimate the temperature (T) evolution of the FM phase fraction of the x = 0.10 sample and construct a complete T-x phase diagram.",

keywords = "Magnetic ordering, Magnetoresistance, Phase separation",

author = "D. Niebieskikwiat and S{\'a}nchez, \{R. D.\} and A. Caneiro",

note = "Funding Information: This work was supported by CNEA, Fundaci{\'o}n Antorchas, and ANPCyT PICT 03-05266. R.D.S. thanks the CONICET for financial support. We acknowledge Dr. C. Ramos for carefull reading this manuscript. We also gratefully thank the help of Dr. V. Gr{\"u}nfeld in the revision of this manuscript.",

year = "2001",

month = dec,

doi = "10.1016/S0304-8853(01)00696-5",

language = "Ingl{\'e}s",

volume = "237",

pages = "241--249",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

number = "3",

}

TY - JOUR

T1 - Phase separation region in the phase diagram of polycrystalline Pr0.65Ca0.35-xSrxMnO3

AU - Niebieskikwiat, D.

AU - Sánchez, R. D.

AU - Caneiro, A.

N1 - Funding Information: This work was supported by CNEA, Fundación Antorchas, and ANPCyT PICT 03-05266. R.D.S. thanks the CONICET for financial support. We acknowledge Dr. C. Ramos for carefull reading this manuscript. We also gratefully thank the help of Dr. V. Grünfeld in the revision of this manuscript.

PY - 2001/12

Y1 - 2001/12

N2 - We have performed measurements of thermoelectric power, electrical resistivity and DC magnetization in polycrystalline samples of Pr0.65Ca0.35-xSrxMnO3 with x = 0, 0.02, 0.05, 0.10 and 0.20. The system presents an evolution from a charge-ordered manganite at x = 0, with an insulating-like resistivity and low magnetization values, towards a ferromagnetic (FM) metallic state for x = 0.20. We show that in the intermediate region a strong competition between the FM double-exchange and the localized charge-ordering occurs, inducing the phase segregation of the two competing states in a wide temperature range. We estimate the temperature (T) evolution of the FM phase fraction of the x = 0.10 sample and construct a complete T-x phase diagram.

AB - We have performed measurements of thermoelectric power, electrical resistivity and DC magnetization in polycrystalline samples of Pr0.65Ca0.35-xSrxMnO3 with x = 0, 0.02, 0.05, 0.10 and 0.20. The system presents an evolution from a charge-ordered manganite at x = 0, with an insulating-like resistivity and low magnetization values, towards a ferromagnetic (FM) metallic state for x = 0.20. We show that in the intermediate region a strong competition between the FM double-exchange and the localized charge-ordering occurs, inducing the phase segregation of the two competing states in a wide temperature range. We estimate the temperature (T) evolution of the FM phase fraction of the x = 0.10 sample and construct a complete T-x phase diagram.

KW - Magnetic ordering

KW - Magnetoresistance

KW - Phase separation

UR - https://www.scopus.com/pages/publications/0035577357

U2 - 10.1016/S0304-8853(01)00696-5

DO - 10.1016/S0304-8853(01)00696-5

M3 - Artículo

AN - SCOPUS:0035577357

SN - 0304-8853

VL - 237

SP - 241

EP - 249

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 3

ER -

Phase separation region in the phase diagram of polycrystalline Pr_0.65Ca_0.35-xSr_xMnO₃

Abstract

Keywords

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