Magnetic order in BaMn2 As2 from neutron diffraction measurements

Singh, Y., Green, M.A., Huang, Q., Kreyssig, A., McQueeney, R.J., Johnston, D.C., Goldman, A.I. (2009) Magnetic order in BaMn2 As2 from neutron diffraction measurements. Physical Review B - Condensed Matter and Materials Physics, 80 (10). 0-0. ISSN 1098-0121. (doi:10.1103/PhysRevB.80.100403) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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http://dx.doi.org/10.1103/PhysRevB.80.100403

Abstract

Neutron diffraction measurements have been performed on a powder sample of BaMn2 As2 over the temperature T range from 10 to 675 K. These measurements demonstrate that this compound exhibits collinear antiferromagnetic ordering below the Néel temperature TN =625 (1) K. The ordered moment μ=3.88 (4) μB /Mn at T=10K is oriented along the c axis and the magnetic structure is G type, with all nearest-neighbor Mn moments antiferromagnetically aligned. The value of the ordered moment indicates that the oxidation state of Mn is Mn2+ with a high spin S=5/2. The T dependence of μ suggests that the magnetic transition is second order in nature. In contrast to the closely related A Fe2 As2 (A=Ca, Sr, Ba, and Eu) compounds, no structural distortion is observed in the magnetically ordered state of BaMn2 As2. Our results indicate that while next-nearest-neighbor interactions are important in the A Fe2 As2 materials, nearest-neighbor interactions are dominant in BaMn2 As2. © 2009 The American Physical Society.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevB.80.100403
Additional information: Unmapped bibliographic data: C7 - 100403 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Phys. Rev. B Condens. Matter Mater. Phys. [Field not mapped to EPrints] AD - Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, United States [Field not mapped to EPrints] AD - NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, United States [Field not mapped to EPrints] AD - Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 15 Oct 2015 11:23 UTC
Last Modified: 29 May 2019 16:09 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51004 (The current URI for this page, for reference purposes)
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