Coexistence of superconductivity and magnetism in the composite material (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x

Daniel Hsu, T. Geetha Kumary, L. Lin, J. G. Lin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The electrical and magnetic properties of the composites (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x with 0≤x≤0.15 were studied by resistivity, ac susceptibility, and magnetization measurements. The undoped La1.85 Sr0.15 Cu O4 (LSCO) undergoes a superconducting transition at ∼40 K, whereas La0.3 Dy0.4 Sr0.3 Mn O3 (LDSMO) exhibits an insulator-to-metal transition (TMI) ∼100 K and a spin glass transition (Tf) ∼70 K. The saturation magnetization of the composites shows an increase with increase in x. The onset temperature (Tc) of the superconducting transition of LSCO remains almost unaltered upon intercalation with LDSMO, whereas the superconducting volume fraction decreases drastically with increase in x. The normal state resistivity of LSCO changes from the initial metallic behavior to that of an insulator when x is increased. The signature of another magnetic transition is observed in the composites below Tf in the ac susceptibility and magnetization measurements. The nature and frequency dependence of this magnetic transition could not, however, be determined due to the onset of superconducting transition. On the basis of analysis of the resistivity data, it is conjectured that intercalation of LSCO with LDSMO leads to charge localization in LSCO which suggests possible microscopic phase separation of LSCO into hole-rich and hole-poor regions.

Original languageEnglish
Article number214504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number21
DOIs
Publication statusPublished - 2006 Dec 14

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Magnetism
Superconductivity
superconductivity
Intercalation
composite materials
Magnetization
Composite materials
Spin glass
Saturation magnetization
intercalation
Phase separation
magnetization
electrical resistivity
Transition metals
Glass transition
Volume fraction
Magnetic properties
Electric properties
insulators
magnetic permeability

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

@article{cdc9152b3e124d60abe4065081eb7b27,
title = "Coexistence of superconductivity and magnetism in the composite material (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x",
abstract = "The electrical and magnetic properties of the composites (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x with 0≤x≤0.15 were studied by resistivity, ac susceptibility, and magnetization measurements. The undoped La1.85 Sr0.15 Cu O4 (LSCO) undergoes a superconducting transition at ∼40 K, whereas La0.3 Dy0.4 Sr0.3 Mn O3 (LDSMO) exhibits an insulator-to-metal transition (TMI) ∼100 K and a spin glass transition (Tf) ∼70 K. The saturation magnetization of the composites shows an increase with increase in x. The onset temperature (Tc) of the superconducting transition of LSCO remains almost unaltered upon intercalation with LDSMO, whereas the superconducting volume fraction decreases drastically with increase in x. The normal state resistivity of LSCO changes from the initial metallic behavior to that of an insulator when x is increased. The signature of another magnetic transition is observed in the composites below Tf in the ac susceptibility and magnetization measurements. The nature and frequency dependence of this magnetic transition could not, however, be determined due to the onset of superconducting transition. On the basis of analysis of the resistivity data, it is conjectured that intercalation of LSCO with LDSMO leads to charge localization in LSCO which suggests possible microscopic phase separation of LSCO into hole-rich and hole-poor regions.",
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Coexistence of superconductivity and magnetism in the composite material (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x. / Hsu, Daniel; Kumary, T. Geetha; Lin, L.; Lin, J. G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 74, No. 21, 214504, 14.12.2006.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Coexistence of superconductivity and magnetism in the composite material (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x

AU - Hsu, Daniel

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AB - The electrical and magnetic properties of the composites (La1.85 Sr0.15 Cu O4) 1-x (La0.3 Dy0.4 Sr0.3 Mn O3) x with 0≤x≤0.15 were studied by resistivity, ac susceptibility, and magnetization measurements. The undoped La1.85 Sr0.15 Cu O4 (LSCO) undergoes a superconducting transition at ∼40 K, whereas La0.3 Dy0.4 Sr0.3 Mn O3 (LDSMO) exhibits an insulator-to-metal transition (TMI) ∼100 K and a spin glass transition (Tf) ∼70 K. The saturation magnetization of the composites shows an increase with increase in x. The onset temperature (Tc) of the superconducting transition of LSCO remains almost unaltered upon intercalation with LDSMO, whereas the superconducting volume fraction decreases drastically with increase in x. The normal state resistivity of LSCO changes from the initial metallic behavior to that of an insulator when x is increased. The signature of another magnetic transition is observed in the composites below Tf in the ac susceptibility and magnetization measurements. The nature and frequency dependence of this magnetic transition could not, however, be determined due to the onset of superconducting transition. On the basis of analysis of the resistivity data, it is conjectured that intercalation of LSCO with LDSMO leads to charge localization in LSCO which suggests possible microscopic phase separation of LSCO into hole-rich and hole-poor regions.

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