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
University of Liverpool
Chalmers, Chemistry and Chemical Engineering, Energy and Material
STFC Rutherford Appleton Laboratory
Danis Badrtdinov
STFC Rutherford Appleton Laboratory
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
Sten Eriksson
Chalmers, Chemistry and Chemical Engineering, Energy and Material
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 214427Subject Categories
Inorganic Chemistry
Theoretical Chemistry
Condensed Matter Physics
DOI
10.1103/PhysRevB.100.214427