Large easy-axis anisotropy in the one-dimensional magnet BaMo(PO4)(2)
Journal article, 2019

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 theta(CW) = -167 K and long-range magnetic order at T-N = 22 K, 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 Delta = 15 meV 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, Neel 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.

Author

Aly Abdeldaim

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

University of Liverpool

ISIS Facility

Danis Badrtdinov

ISIS Facility

Alexandra S. Gibbs

Science and Technology Facilities Council (STFC)

Pascal Manuel

Science and Technology Facilities Council (STFC)

Helen C. Walker

Science and Technology Facilities Council (STFC)

Manh Duc Le

Science and Technology Facilities Council (STFC)

Chien Hung Wu

Science and Technology Facilities Council (STFC)

Dariusz Wojciech Wardecki

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

Sten Eriksson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

Yaroslav O. Kvashnin

Uppsala University

Alexander A. Tsirlin

Ural Federal University

University of Augsburg

Goran J. Nilsen

Science and Technology Facilities Council (STFC)

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 100 21 214427

Subject Categories

Inorganic Chemistry

Theoretical Chemistry

Condensed Matter Physics

DOI

10.1103/PhysRevB.100.214427

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Latest update

9/23/2020