The structural and physical properties of Ba1-xSr xFe2As2(0 ≤ x ≤ 1) and Ba 1-xSrxFe1.8Co0.2As2(0 ≤ x ≤ 1)

Zhiwei Wang; Huaixin Yang; Chao Ma; Huanfang Tian; Honglong Shi; Jiangbo Lu; Lunjie Zeng; Jianqi Li

doi:10.1088/0953-8984/21/49/495701

The structural and physical properties of Ba_1-xSr _xFe₂As₂(0 ≤ x ≤ 1) and Ba _1-xSr_xFe_1.8Co_0.2As₂(0 ≤ x ≤ 1)

Zhiwei Wang, Huaixin Yang, Chao Ma, Huanfang Tian, Honglong Shi, Jiangbo Lu, Lunjie Zeng, Jianqi Li^*

^*Corresponding author for this work

CAS - Institute of Physics

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

11 Citations (Scopus)

Abstract

Polycrystalline samples of Ba_1-xSr_xFe ₂As₂(0≤x≤1) and Ba_1-xSr _xFe_1.8Co_0.2As₂ (0≤x≤1) have been synthesized by a solid state reaction method. Structural analysis by means of x-ray diffraction shows that the lattice parameters and unit cell volume decrease monotonically with the increase of x for Ba_1-xSr _xFe₂As₂. The measurements of transport properties demonstrate that the average size of the Ba(Sr)-site cations could evidently influence the spin density wave (SDW) behavior in Ba _1-xSr_xFe₂As₂ and superconductivity in Ba_1-xSr_xFe_1.8Co_0.2As₂ as well. The critical temperature for SDW (T_SDW) increases with the Sr substitution for Ba in Ba_1-xSr_xFe₂As ₂ and, on the other hand, the superconducting T_c decreases with the increase of Sr content in Ba_1-xSr_xFe _1.8Co_0.2As₂. The inhomogeneous distributions of Ba/Sr ions and structural distortions in Ba_0.5Sr _0.5Fe₂As₂ have been investigated by transmission-electron microscopy (TEM) observations.

Original language	English
Article number	495701
Journal	Journal of Physics Condensed Matter
Volume	21
Issue number	49
DOIs	https://doi.org/10.1088/0953-8984/21/49/495701
Publication status	Published - 2009
Externally published	Yes

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title = "The structural and physical properties of Ba1-xSr xFe2As2(0 ≤ x ≤ 1) and Ba 1-xSrxFe1.8Co0.2As2(0 ≤ x ≤ 1)",

abstract = "Polycrystalline samples of Ba1-xSrxFe 2As2(0≤x≤1) and Ba1-xSr xFe1.8Co0.2As2 (0≤x≤1) have been synthesized by a solid state reaction method. Structural analysis by means of x-ray diffraction shows that the lattice parameters and unit cell volume decrease monotonically with the increase of x for Ba1-xSr xFe2As2. The measurements of transport properties demonstrate that the average size of the Ba(Sr)-site cations could evidently influence the spin density wave (SDW) behavior in Ba 1-xSrxFe2As2 and superconductivity in Ba1-xSrxFe1.8Co0.2As2 as well. The critical temperature for SDW (TSDW) increases with the Sr substitution for Ba in Ba1-xSrxFe2As 2 and, on the other hand, the superconducting Tc decreases with the increase of Sr content in Ba1-xSrxFe 1.8Co0.2As2. The inhomogeneous distributions of Ba/Sr ions and structural distortions in Ba0.5Sr 0.5Fe2As2 have been investigated by transmission-electron microscopy (TEM) observations.",

author = "Zhiwei Wang and Huaixin Yang and Chao Ma and Huanfang Tian and Honglong Shi and Jiangbo Lu and Lunjie Zeng and Jianqi Li",

year = "2009",

doi = "10.1088/0953-8984/21/49/495701",

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T1 - The structural and physical properties of Ba1-xSr xFe2As2(0 ≤ x ≤ 1) and Ba 1-xSrxFe1.8Co0.2As2(0 ≤ x ≤ 1)

AU - Wang, Zhiwei

AU - Yang, Huaixin

AU - Ma, Chao

AU - Tian, Huanfang

AU - Shi, Honglong

AU - Lu, Jiangbo

AU - Zeng, Lunjie

AU - Li, Jianqi

PY - 2009

Y1 - 2009

N2 - Polycrystalline samples of Ba1-xSrxFe 2As2(0≤x≤1) and Ba1-xSr xFe1.8Co0.2As2 (0≤x≤1) have been synthesized by a solid state reaction method. Structural analysis by means of x-ray diffraction shows that the lattice parameters and unit cell volume decrease monotonically with the increase of x for Ba1-xSr xFe2As2. The measurements of transport properties demonstrate that the average size of the Ba(Sr)-site cations could evidently influence the spin density wave (SDW) behavior in Ba 1-xSrxFe2As2 and superconductivity in Ba1-xSrxFe1.8Co0.2As2 as well. The critical temperature for SDW (TSDW) increases with the Sr substitution for Ba in Ba1-xSrxFe2As 2 and, on the other hand, the superconducting Tc decreases with the increase of Sr content in Ba1-xSrxFe 1.8Co0.2As2. The inhomogeneous distributions of Ba/Sr ions and structural distortions in Ba0.5Sr 0.5Fe2As2 have been investigated by transmission-electron microscopy (TEM) observations.

AB - Polycrystalline samples of Ba1-xSrxFe 2As2(0≤x≤1) and Ba1-xSr xFe1.8Co0.2As2 (0≤x≤1) have been synthesized by a solid state reaction method. Structural analysis by means of x-ray diffraction shows that the lattice parameters and unit cell volume decrease monotonically with the increase of x for Ba1-xSr xFe2As2. The measurements of transport properties demonstrate that the average size of the Ba(Sr)-site cations could evidently influence the spin density wave (SDW) behavior in Ba 1-xSrxFe2As2 and superconductivity in Ba1-xSrxFe1.8Co0.2As2 as well. The critical temperature for SDW (TSDW) increases with the Sr substitution for Ba in Ba1-xSrxFe2As 2 and, on the other hand, the superconducting Tc decreases with the increase of Sr content in Ba1-xSrxFe 1.8Co0.2As2. The inhomogeneous distributions of Ba/Sr ions and structural distortions in Ba0.5Sr 0.5Fe2As2 have been investigated by transmission-electron microscopy (TEM) observations.

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The structural and physical properties of Ba_1-xSr _xFe₂As₂(0 ≤ x ≤ 1) and Ba _1-xSr_xFe_1.8Co_0.2As₂(0 ≤ x ≤ 1)

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