Structural properties of BaFe 1.8Ni 0.2As 2 under pressure

Feng Jiang Jia; Wenge Yang; Lin Jun Li; Zhu An Xu; Xiao Jia Chen

doi:10.1016/j.physc.2011.12.001

Structural properties of BaFe _1.8Ni _0.2As ₂ under pressure

Feng Jiang Jia
, Wenge Yang
, Lin Jun Li
, Zhu An Xu
, Xiao Jia Chen^*

^*Corresponding author for this work

South China University of Technology
High Pressure Synergetic Consortium
Zhejiang University
Carnegie Institution of Washington

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

6 Scopus citations

Abstract

The structural properties of electron-doped compound BaFe _1.8Ni _0.2As ₂ are investigated by the synchrotron X-ray powder diffraction at high pressures ranged from 1 bar to 24.0 GPa at room temperature. The compound BaFe _1.8Ni _0.2As ₂ holds a tetragonal structure (space group I4/mmm) at ambient condition. Upon compression, the lattice parameter a first monotonically decreases from ambient pressure to 7.0 GPa, then increases till reaching a maximum at 17.8 GPa and again further decreases to the maximum pressure in this investigation. The other lattice parameter c exhibits a slow decrease with increasing pressure before 7.0 GPa and a rapid reduction after that. This anomalous lattice compression results in a lattice collapse at around 12 GPa while the material enters a collapsed tetragonal phase. The Fe-magnetic state change is proposed to account for the structural evolution superconductivity.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	474
DOIs	https://doi.org/10.1016/j.physc.2011.12.001
State	Published - Mar 2012
Externally published	Yes

Keywords

High pressure
Iron-based superconductors
Structural properties
Synchrotron X-ray diffraction

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10.1016/j.physc.2011.12.001

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title = "Structural properties of BaFe 1.8Ni 0.2As 2 under pressure",

abstract = "The structural properties of electron-doped compound BaFe 1.8Ni 0.2As 2 are investigated by the synchrotron X-ray powder diffraction at high pressures ranged from 1 bar to 24.0 GPa at room temperature. The compound BaFe 1.8Ni 0.2As 2 holds a tetragonal structure (space group I4/mmm) at ambient condition. Upon compression, the lattice parameter a first monotonically decreases from ambient pressure to 7.0 GPa, then increases till reaching a maximum at 17.8 GPa and again further decreases to the maximum pressure in this investigation. The other lattice parameter c exhibits a slow decrease with increasing pressure before 7.0 GPa and a rapid reduction after that. This anomalous lattice compression results in a lattice collapse at around 12 GPa while the material enters a collapsed tetragonal phase. The Fe-magnetic state change is proposed to account for the structural evolution superconductivity.",

keywords = "High pressure, Iron-based superconductors, Structural properties, Synchrotron X-ray diffraction",

author = "Jia, \{Feng Jiang\} and Wenge Yang and Li, \{Lin Jun\} and Xu, \{Zhu An\} and Chen, \{Xiao Jia\}",

year = "2012",

month = mar,

doi = "10.1016/j.physc.2011.12.001",

language = "英语",

volume = "474",

pages = "1--4",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Structural properties of BaFe 1.8Ni 0.2As 2 under pressure

AU - Jia, Feng Jiang

AU - Yang, Wenge

AU - Li, Lin Jun

AU - Xu, Zhu An

AU - Chen, Xiao Jia

PY - 2012/3

Y1 - 2012/3

N2 - The structural properties of electron-doped compound BaFe 1.8Ni 0.2As 2 are investigated by the synchrotron X-ray powder diffraction at high pressures ranged from 1 bar to 24.0 GPa at room temperature. The compound BaFe 1.8Ni 0.2As 2 holds a tetragonal structure (space group I4/mmm) at ambient condition. Upon compression, the lattice parameter a first monotonically decreases from ambient pressure to 7.0 GPa, then increases till reaching a maximum at 17.8 GPa and again further decreases to the maximum pressure in this investigation. The other lattice parameter c exhibits a slow decrease with increasing pressure before 7.0 GPa and a rapid reduction after that. This anomalous lattice compression results in a lattice collapse at around 12 GPa while the material enters a collapsed tetragonal phase. The Fe-magnetic state change is proposed to account for the structural evolution superconductivity.

AB - The structural properties of electron-doped compound BaFe 1.8Ni 0.2As 2 are investigated by the synchrotron X-ray powder diffraction at high pressures ranged from 1 bar to 24.0 GPa at room temperature. The compound BaFe 1.8Ni 0.2As 2 holds a tetragonal structure (space group I4/mmm) at ambient condition. Upon compression, the lattice parameter a first monotonically decreases from ambient pressure to 7.0 GPa, then increases till reaching a maximum at 17.8 GPa and again further decreases to the maximum pressure in this investigation. The other lattice parameter c exhibits a slow decrease with increasing pressure before 7.0 GPa and a rapid reduction after that. This anomalous lattice compression results in a lattice collapse at around 12 GPa while the material enters a collapsed tetragonal phase. The Fe-magnetic state change is proposed to account for the structural evolution superconductivity.

KW - High pressure

KW - Iron-based superconductors

KW - Structural properties

KW - Synchrotron X-ray diffraction

UR - https://www.scopus.com/pages/publications/84855435708

U2 - 10.1016/j.physc.2011.12.001

DO - 10.1016/j.physc.2011.12.001

M3 - 文章

AN - SCOPUS:84855435708

SN - 0921-4534

VL - 474

SP - 1

EP - 4

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -

Structural properties of BaFe _1.8Ni _0.2As ₂ under pressure

Abstract

Keywords

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