Structural and physical properties of Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1.0) and Ca 0.5Sr 0.5Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6)

H. L. Shi; H. X. Yang; H. F. Tian; C. Ma; J. B. Lu; Z. W. Wang; J. Q. Li

doi:10.1007/s10948-010-0660-9

Structural and physical properties of Ca _1-xSr _xFe ₂As ₂ (0 ≤ x ≤ 1.0) and Ca _0.5Sr _0.5Fe _2-yCo _yAs ₂ (0 ≤ y ≤ 0.6)

H. L. Shi, H. X. Yang, H. F. Tian, C. Ma, J. B. Lu, Z. W. Wang, J. Q. Li

CAS - Institute of Physics

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2 引用（Scopus）

摘要

The Ca _1-xSr _xFe ₂As ₂ (0 ≤ x ≤ 1) and Ca _0.5Sr _0.5 Fe _2-yCo _yAs ₂ (0 ≤ y ≤ 0.6) materials were prepared by a solid state reaction method. X-ray diffraction analysis shows that the lattice parameters of Ca _1-xSr _xFe ₂As ₂ decrease continuously with increasing Ca content. Resistivity measurements reveal that the Ca/Sr ratio has a visible influence on the resistivity anomaly associated with the spin-density-wave (SDW) instability. Experimental measurements on Ca _0.5Sr _0.5Fe _2-yCo _yAs ₂ show clear superconducting transitions for Co in range of 0.26 ≤ y ≤ 0.43; the highest critical transition temperature is found to be at about 17 K. Transmission electron microscopy (TEM) investigations on the superconducting Ca _0.5Sr _0.5Fe _2-yCo _yAs ₂ samples reveal visible inhomogeneous distribution of Sr and Ca elements, which could result in structural distortions and broaden superconducting transitions as observed in our experiments.

源语言	英语
页（从-至）	749-755
页数	7
期刊	Journal of Superconductivity and Novel Magnetism
卷	23
期	5
DOI	https://doi.org/10.1007/s10948-010-0660-9
出版状态	已出版 - 7月 2010
已对外发布	是

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title = "Structural and physical properties of Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1.0) and Ca 0.5Sr 0.5Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6)",

abstract = "The Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1) and Ca 0.5Sr 0.5 Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6) materials were prepared by a solid state reaction method. X-ray diffraction analysis shows that the lattice parameters of Ca 1-xSr xFe 2As 2 decrease continuously with increasing Ca content. Resistivity measurements reveal that the Ca/Sr ratio has a visible influence on the resistivity anomaly associated with the spin-density-wave (SDW) instability. Experimental measurements on Ca 0.5Sr 0.5Fe 2-yCo yAs 2 show clear superconducting transitions for Co in range of 0.26 ≤ y ≤ 0.43; the highest critical transition temperature is found to be at about 17 K. Transmission electron microscopy (TEM) investigations on the superconducting Ca 0.5Sr 0.5Fe 2-yCo yAs 2 samples reveal visible inhomogeneous distribution of Sr and Ca elements, which could result in structural distortions and broaden superconducting transitions as observed in our experiments.",

keywords = "SDW, Structural inhomogeneity, Superconductivity",

author = "Shi, {H. L.} and Yang, {H. X.} and Tian, {H. F.} and C. Ma and Lu, {J. B.} and Wang, {Z. W.} and Li, {J. Q.}",

year = "2010",

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doi = "10.1007/s10948-010-0660-9",

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T1 - Structural and physical properties of Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1.0) and Ca 0.5Sr 0.5Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6)

AU - Shi, H. L.

AU - Yang, H. X.

AU - Tian, H. F.

AU - Ma, C.

AU - Lu, J. B.

AU - Wang, Z. W.

AU - Li, J. Q.

PY - 2010/7

Y1 - 2010/7

N2 - The Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1) and Ca 0.5Sr 0.5 Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6) materials were prepared by a solid state reaction method. X-ray diffraction analysis shows that the lattice parameters of Ca 1-xSr xFe 2As 2 decrease continuously with increasing Ca content. Resistivity measurements reveal that the Ca/Sr ratio has a visible influence on the resistivity anomaly associated with the spin-density-wave (SDW) instability. Experimental measurements on Ca 0.5Sr 0.5Fe 2-yCo yAs 2 show clear superconducting transitions for Co in range of 0.26 ≤ y ≤ 0.43; the highest critical transition temperature is found to be at about 17 K. Transmission electron microscopy (TEM) investigations on the superconducting Ca 0.5Sr 0.5Fe 2-yCo yAs 2 samples reveal visible inhomogeneous distribution of Sr and Ca elements, which could result in structural distortions and broaden superconducting transitions as observed in our experiments.

AB - The Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1) and Ca 0.5Sr 0.5 Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6) materials were prepared by a solid state reaction method. X-ray diffraction analysis shows that the lattice parameters of Ca 1-xSr xFe 2As 2 decrease continuously with increasing Ca content. Resistivity measurements reveal that the Ca/Sr ratio has a visible influence on the resistivity anomaly associated with the spin-density-wave (SDW) instability. Experimental measurements on Ca 0.5Sr 0.5Fe 2-yCo yAs 2 show clear superconducting transitions for Co in range of 0.26 ≤ y ≤ 0.43; the highest critical transition temperature is found to be at about 17 K. Transmission electron microscopy (TEM) investigations on the superconducting Ca 0.5Sr 0.5Fe 2-yCo yAs 2 samples reveal visible inhomogeneous distribution of Sr and Ca elements, which could result in structural distortions and broaden superconducting transitions as observed in our experiments.

KW - SDW

KW - Structural inhomogeneity

KW - Superconductivity

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JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 5

ER -

Structural and physical properties of Ca 1-xSr xFe 2As 2 (0 ≤ x ≤ 1.0) and Ca 0.5Sr 0.5Fe 2-yCo yAs 2 (0 ≤ y ≤ 0.6)

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Structural and physical properties of Ca _1-xSr _xFe ₂As ₂ (0 ≤ x ≤ 1.0) and Ca _0.5Sr _0.5Fe _2-yCo _yAs ₂ (0 ≤ y ≤ 0.6)