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Title: Structural properties of BaFe[subscript 1.8]Ni[subscript 0.2]As[subscript 2] under pressure

Abstract

The structural properties of electron-doped compound BaFe1.8Ni0.2As2 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 BaFe1.8Ni0.2As2 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.

Authors:
; ; ; ;  [1]
  1. SCUT-China
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGNDOE - BASIC ENERGY SCIENCES
OSTI Identifier:
1038601
Resource Type:
Journal Article
Journal Name:
Physica C
Additional Journal Information:
Journal Volume: 474; Journal Issue: 03, 2012; Journal ID: ISSN 0921-4534
Country of Publication:
United States
Language:
ENGLISH
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPRESSION; DIFFRACTION; LATTICE PARAMETERS; SUPERCONDUCTIVITY; SUPERCONDUCTORS; SYNCHROTRONS; X-RAY DIFFRACTION

Citation Formats

Jia, Feng-Jiang, Yang, Wenge, Li, Lin-Jun, Xu, Zhu-An, Chen, Xiao-Jia, CIW), and Zhejiang). Structural properties of BaFe[subscript 1.8]Ni[subscript 0.2]As[subscript 2] under pressure. United States: N. p., 2014. Web. doi:10.1016/j.physc.2011.12.001.
Jia, Feng-Jiang, Yang, Wenge, Li, Lin-Jun, Xu, Zhu-An, Chen, Xiao-Jia, CIW), & Zhejiang). Structural properties of BaFe[subscript 1.8]Ni[subscript 0.2]As[subscript 2] under pressure. United States. https://doi.org/10.1016/j.physc.2011.12.001
Jia, Feng-Jiang, Yang, Wenge, Li, Lin-Jun, Xu, Zhu-An, Chen, Xiao-Jia, CIW), and Zhejiang). 2014. "Structural properties of BaFe[subscript 1.8]Ni[subscript 0.2]As[subscript 2] under pressure". United States. https://doi.org/10.1016/j.physc.2011.12.001.
@article{osti_1038601,
title = {Structural properties of BaFe[subscript 1.8]Ni[subscript 0.2]As[subscript 2] under pressure},
author = {Jia, Feng-Jiang and Yang, Wenge and Li, Lin-Jun and Xu, Zhu-An and Chen, Xiao-Jia and CIW) and Zhejiang)},
abstractNote = {The structural properties of electron-doped compound BaFe1.8Ni0.2As2 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 BaFe1.8Ni0.2As2 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.},
doi = {10.1016/j.physc.2011.12.001},
url = {https://www.osti.gov/biblio/1038601}, journal = {Physica C},
issn = {0921-4534},
number = 03, 2012,
volume = 474,
place = {United States},
year = {Mon Jan 13 00:00:00 EST 2014},
month = {Mon Jan 13 00:00:00 EST 2014}
}