Room-temperature Ba(Fe1-xCox)2As2 is not tetragonal: Direct observation of magnetoelastic interactions in pnictide superconductors

Claudia Cantoni; Michael A. McGuire; Bayrammurad Saparov; Andrew F. May; Trevor Keiber; Frank Bridges; Athena S. Sefat; Brian C. Sales

doi:10.1002/adma.201404079

Room-temperature Ba(Fe_1-xCo_x)₂As₂ is not tetragonal: Direct observation of magnetoelastic interactions in pnictide superconductors

Claudia Cantoni, Michael A. McGuire, Bayrammurad Saparov, Andrew F. May, Trevor Keiber, Frank Bridges, Athena S. Sefat, Brian C. Sales

Correlated Electron Materials

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Abstract

Lattice distortions corresponding to Ba displacements with respect to the FeAs sublattice are revealed to break the room-temperature tetragonal symmetry in Ba(Fe_1-xCo_x)₂As_2. The displacements yield twin domains of the size of ≈10 nm. The domain size correlates with the magnitude of the local Fe magnetic moment and its non-monotonic dependence on Co concentration.

Original language	English
Pages (from-to)	2715-2721
Number of pages	7
Journal	Advanced Materials
Volume	27
Issue number	17
DOIs	https://doi.org/10.1002/adma.201404079
State	Published - Jun 5 2015

Keywords

iron-based superconductors
lattice distortions
local magnetic moment
scanning transmission electron microscopy

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title = "Room-temperature Ba(Fe1-xCox)2As2 is not tetragonal: Direct observation of magnetoelastic interactions in pnictide superconductors",

abstract = "Lattice distortions corresponding to Ba displacements with respect to the FeAs sublattice are revealed to break the room-temperature tetragonal symmetry in Ba(Fe1-xCox)2As2. The displacements yield twin domains of the size of ≈10 nm. The domain size correlates with the magnitude of the local Fe magnetic moment and its non-monotonic dependence on Co concentration.",

keywords = "iron-based superconductors, lattice distortions, local magnetic moment, scanning transmission electron microscopy",

author = "Claudia Cantoni and McGuire, {Michael A.} and Bayrammurad Saparov and May, {Andrew F.} and Trevor Keiber and Frank Bridges and Sefat, {Athena S.} and Sales, {Brian C.}",

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T1 - Room-temperature Ba(Fe1-xCox)2As2 is not tetragonal

T2 - Direct observation of magnetoelastic interactions in pnictide superconductors

AU - Cantoni, Claudia

AU - McGuire, Michael A.

AU - Saparov, Bayrammurad

AU - May, Andrew F.

AU - Keiber, Trevor

AU - Bridges, Frank

AU - Sefat, Athena S.

AU - Sales, Brian C.

PY - 2015/6/5

Y1 - 2015/6/5

N2 - Lattice distortions corresponding to Ba displacements with respect to the FeAs sublattice are revealed to break the room-temperature tetragonal symmetry in Ba(Fe1-xCox)2As2. The displacements yield twin domains of the size of ≈10 nm. The domain size correlates with the magnitude of the local Fe magnetic moment and its non-monotonic dependence on Co concentration.

AB - Lattice distortions corresponding to Ba displacements with respect to the FeAs sublattice are revealed to break the room-temperature tetragonal symmetry in Ba(Fe1-xCox)2As2. The displacements yield twin domains of the size of ≈10 nm. The domain size correlates with the magnitude of the local Fe magnetic moment and its non-monotonic dependence on Co concentration.

KW - iron-based superconductors

KW - lattice distortions

KW - local magnetic moment

KW - scanning transmission electron microscopy

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DO - 10.1002/adma.201404079

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JO - Advanced Materials

JF - Advanced Materials

IS - 17

ER -

Room-temperature Ba(Fe_1-xCo_x)₂As₂ is not tetragonal: Direct observation of magnetoelastic interactions in pnictide superconductors

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Keywords

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