Tetragonal magnetic phase in Ba1-x KxFe2As2 from x-ray and neutron diffraction

J. M. Allred; S. Avci; D. Y. Chung; H. Claus; D. D. Khalyavin; P. Manuel; K. M. Taddei; M. G. Kanatzidis; S. Rosenkranz; R. Osborn; O. Chmaissem

doi:10.1103/PhysRevB.92.094515

Tetragonal magnetic phase in Ba1-x KxFe2As2 from x-ray and neutron diffraction

J. M. Allred, S. Avci, D. Y. Chung, H. Claus, D. D. Khalyavin, P. Manuel, K. M. Taddei, M. G. Kanatzidis, S. Rosenkranz, R. Osborn, O. Chmaissem

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Abstract

Combined neutron and x-ray diffraction experiments demonstrate the formation of a low-temperature minority magnetic tetragonal phase in Ba0.76K0.24Fe2As2 in addition to the majority magnetic, orthorhombic phase. The coincident enhancement in the magnetic (12 12 1) peaks shows that this minority phase is of the same type that was observed in Ba1-xNaxFe2As2 (0.24≤x≤0.28), in which the magnetic moments reorient along the c axis. This is evidence that the tetragonal magnetic phase is a universal feature of the hole-doped iron-based superconductors. The observations suggest that in this regime the energy levels of the C2 and C4 symmetric magnetic phases are very close.

Original language	English
Article number	094515
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.92.094515
Publication status	Published - 28 Sept 2015
Externally published	Yes

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© 2015 American Physical Society.

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Allred, J. M., Avci, S., Chung, D. Y., Claus, H., Khalyavin, D. D., Manuel, P., Taddei, K. M., Kanatzidis, M. G., Rosenkranz, S., Osborn, R., & Chmaissem, O. (2015). Tetragonal magnetic phase in Ba1-x KxFe2As2 from x-ray and neutron diffraction. Physical Review B - Condensed Matter and Materials Physics, 92(9), Article 094515. https://doi.org/10.1103/PhysRevB.92.094515

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title = "Tetragonal magnetic phase in Ba1-x KxFe2As2 from x-ray and neutron diffraction",

abstract = "Combined neutron and x-ray diffraction experiments demonstrate the formation of a low-temperature minority magnetic tetragonal phase in Ba0.76K0.24Fe2As2 in addition to the majority magnetic, orthorhombic phase. The coincident enhancement in the magnetic (12 12 1) peaks shows that this minority phase is of the same type that was observed in Ba1-xNaxFe2As2 (0.24≤x≤0.28), in which the magnetic moments reorient along the c axis. This is evidence that the tetragonal magnetic phase is a universal feature of the hole-doped iron-based superconductors. The observations suggest that in this regime the energy levels of the C2 and C4 symmetric magnetic phases are very close.",

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doi = "10.1103/PhysRevB.92.094515",

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AU - Allred, J. M.

AU - Avci, S.

AU - Chung, D. Y.

AU - Claus, H.

AU - Khalyavin, D. D.

AU - Manuel, P.

AU - Taddei, K. M.

AU - Kanatzidis, M. G.

AU - Rosenkranz, S.

AU - Osborn, R.

AU - Chmaissem, O.

PY - 2015/9/28

Y1 - 2015/9/28

N2 - Combined neutron and x-ray diffraction experiments demonstrate the formation of a low-temperature minority magnetic tetragonal phase in Ba0.76K0.24Fe2As2 in addition to the majority magnetic, orthorhombic phase. The coincident enhancement in the magnetic (12 12 1) peaks shows that this minority phase is of the same type that was observed in Ba1-xNaxFe2As2 (0.24≤x≤0.28), in which the magnetic moments reorient along the c axis. This is evidence that the tetragonal magnetic phase is a universal feature of the hole-doped iron-based superconductors. The observations suggest that in this regime the energy levels of the C2 and C4 symmetric magnetic phases are very close.

AB - Combined neutron and x-ray diffraction experiments demonstrate the formation of a low-temperature minority magnetic tetragonal phase in Ba0.76K0.24Fe2As2 in addition to the majority magnetic, orthorhombic phase. The coincident enhancement in the magnetic (12 12 1) peaks shows that this minority phase is of the same type that was observed in Ba1-xNaxFe2As2 (0.24≤x≤0.28), in which the magnetic moments reorient along the c axis. This is evidence that the tetragonal magnetic phase is a universal feature of the hole-doped iron-based superconductors. The observations suggest that in this regime the energy levels of the C2 and C4 symmetric magnetic phases are very close.

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Tetragonal magnetic phase in Ba1-x KxFe2As2 from x-ray and neutron diffraction

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