Universität zu Köln

Wasser, Florian, Wurmehl, Sabine ORCID: 0000-0002-5841-5458, Aswartham, Saicharan, Sidis, Yvan, Park, J. T., Schneidewind, Astrid ORCID: 0000-0002-7239-9888, Buechner, Bernd and Braden, Markus ORCID: 0000-0002-9284-6585 (2017). Spin reorientation transition in Na-doped BaFe2As2 studied by single-crystal neutron diffraction. Phys. Status Solidi B-Basic Solid State Phys., 254 (1). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1521-3951

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Abstract

Several hole-doped BaFe2As2 compounds were recently shown to exhibit a second magnetic phase transition in the concentration range close to the full suppression of antiferromagnetic (AFM) order. At this additional transition ordered magnetic moments reorient from in-plane to out-of-plane alignment associated with a suppression of the orthorhombic distortion. We have studied the magnetic properties of such a representative hole-doped system, Ba1-xNaxFe2As2 with 0.25 <= x <= 0.40, by neutron diffraction on large single crystals. With increasing Na substitution (0.25 <= x <= 0.39) the AFM transition temperature sharply decreases, while the spin-reorientation transition temperature is rather constant, until both magnetic phases are completely suppressed at x=0.40. For all studied Na concentrations the additional transition is related to the spin reorientation, which, however, is complete only in the middle of the concentration range of the out-of-plane phase. In the superconducting state, the intensities of magnetic Bragg reflections become heavily suppressed; this effect seems to increase for larger T-c and reaches similar to 50% in Ba0.61Na0.39Fe2As2. In samples with coexisting in-plane and out-of-plane ordering, this superconductivity induced suppression of ordered moments is significantly stronger for the out-of-plane components indicating that this phase more strongly competes with superconductivity. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wasser, Florian UNSPECIFIED UNSPECIFIED UNSPECIFIED Wurmehl, Sabine UNSPECIFIED orcid.org/0000-0002-5841-5458 UNSPECIFIED Aswartham, Saicharan UNSPECIFIED UNSPECIFIED UNSPECIFIED Sidis, Yvan UNSPECIFIED UNSPECIFIED UNSPECIFIED Park, J. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schneidewind, Astrid UNSPECIFIED orcid.org/0000-0002-7239-9888 UNSPECIFIED Buechner, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, Markus UNSPECIFIED orcid.org/0000-0002-9284-6585 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-247594
DOI:	10.1002/pssb.201600181
Journal or Publication Title:	Phys. Status Solidi B-Basic Solid State Phys.
Volume:	254
Number:	1
Date:	2017
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1521-3951
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language IRON-BASED SUPERCONDUCTORS; NEMATIC ORDER; DENSITY-WAVE; SUPPRESSION; STATE Multiple languages Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/24759