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Physical Review BVolume 100, Issue 21, 23 December 2019, Article number 214427

Large easy-axis anisotropy in the one-dimensional magnet BaMo(PO4)2(Article)(Open Access)

  • Abdeldaim, A.H.,
  • Badrtdinov, D.I.,
  • Gibbs, A.S.,
  • Manuel, P.,
  • Walker, H.C.,
  • Le, M.D.,
  • Wu, C.H.,
  • Wardecki, D.,
  • Eriksson, S.-G.,
  • Kvashnin, Y.O.,
  • Tsirlin, A.A.,
  • Nilsen, Gø.J.
  Save all to author list
  • aDepartment of Chemistry and Chemical Engineering, Energy and Materials, Chalmers University of Technology, Gothenburg, SE-412 96, Sweden
  • bDepartment of Chemistry and Materials Innovation Factory, University of Liverpool, 51 Oxford Street, Liverpool, L7 3NY, United Kingdom
  • cISIS Neutron and Muon Source, Science and Technology Facilities Council, Didcot, OX11 0QX, United Kingdom
  • dTheoretical Physics and Applied Mathematics Department, Ural Federal University, Yekaterinburg, 620002, Russian Federation
  • eDepartment of Physics and Astronomy, Uppsala University, P.O. Box 516, Uppsala, S-75120, Sweden
  • fExperimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg, 86135, Germany

Abstract

We present an extensive experimental and theoretical study on the low-temperature magnetic properties of the monoclinic anhydrous alum compound BaMo(PO4)2. The magnetic susceptibility reveals strong antiferromagnetic interactions θCW=-167K and long-range magnetic order at TN=22K, in agreement with a recent report. Powder neutron diffraction furthermore shows that the order is collinear, with the moments near the ac plane. Neutron spectroscopy reveals a large excitation gap Δ=15meV in the low-temperature ordered phase, suggesting a much larger easy-axis spin anisotropy than anticipated. However, the large anisotropy justifies the relatively high ordered moment, Néel temperature, and collinear order observed experimentally and is furthermore reproduced in a first-principles calculations by using a new computational scheme. We therefore propose BaMo(PO4)2 to host S=1 antiferromagnetic chains with large easy-axis anisotropy, which has been theoretically predicted to realize novel excitation continua. © 2019 American Physical Society.

Indexed keywords

Engineering controlled terms:AnisotropyAntiferromagnetismBarium compoundsCalculationsMagnetic susceptibilityTemperature
Engineering uncontrolled termsAntiferro-magnetic interactionsAntiferromagnetic chainComputational schemesFirst-principles calculationLong range magnetic orderNeutron spectroscopyOne-dimensional magnetsPowder neutron diffraction
Engineering main heading:One dimensional

Funding details

Funding sponsor Funding number Acronym
Alexander von Humboldt-Stiftung
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Science and Technology Facilities Council
See opportunities by STFC		STFC
University of Liverpool
See opportunities by UoL		UoL
Swedish Foundation for International Cooperation in Research and Higher Education
See opportunities by STINT		CTH-012STINT
Russian Foundation for Basic Research18-32-00018РФФИ
Bundesministerium für Bildung und ForschungBMBF

  • 1

    The work of D.I.B. was funded by RFBR according to the research Project No. 18-32-00018. A.A.T. acknowledges financial support by the Federal Ministry for Education and Research through the Sofja Kovalevskaya Award of Alexander von Humboldt Foundation. D.I.B. and Y.O.K. acknowledge the support of the Swedish Foundation for International Cooperation in Research and Higher Education (STINT). The work at Chalmers University of Technology was supported by MAX4ESS under Project Number CTH-012. Financial support for the Ph.D. of A.H.A. by the University of Liverpool and the Science and Technology Facilities Council (STFC) is acknowledged. We gratefully acknowledge the STFC for access to neutron beam time at ISIS and thank Dr. G. Stenning for aiding with SQUID and specific-heat measurements at the Materials Characterization Laboratory, ISIS. We thank F. Lange (University of Greifswald), H. Fehske (University of Greifswald), L. Clark (University of Liverpool), and F. Kruger (ISIS and University College London) for useful discussions.

  • ISSN: 24699950
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1103/PhysRevB.100.214427
  • Document Type: Article
  • Publisher: American Physical Society


© Copyright 2020 Elsevier B.V., All rights reserved.

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