Magnetoelastic coupling in the stretched diamond lattice of TbTaO4
Zhang X. Kelly N.D. Sheptyakov D. Liu C. Deng S. Saxena S.S. Dutton S.E.
10 March 2025Royal Society of Chemistry
Materials Advances
2025#6Issue 82570 - 2578 pp.
The magnetic structure of diamond-like lattice has been studied extensively in terms of the magnetic frustration. Here we report the distortion of stretched diamond lattice of Tb3+ (4f8) in M-TbTaO4 on application of a magnetic field. We have investigated the structural and magnetic properties of M phase terbium tantalate M-TbTaO4 as a function of temperature and magnetic field using magnetometry and powder neutron diffraction. Sharp λ-shape transitions in d(χT)/dT, dM/dH and specific heat data confirm the previously reported three-dimensional (3D) antiferromagnetic ordering at TN ∼ 2.25 K. On application of a magnetic field the Néel temperature is found to decrease and variable field neutron diffraction experiments below TN at 1.6 K show an increase in both the bond and angle distortion of the stretched diamond lattice with magnetic field, indicating a potential magneto-elastic coupling effect. By combining our magnetometry, heat capacity and neutron diffraction results we generate a magnetic phase diagram for M-TbTaO4 as a function of temperature and field.
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Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
Department of Chemistry, University of Oxford, Mansfield Rd, Oxford, OX1 3TA, United Kingdom
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut (PSI), Forschungsstrasse 111, Villigen PSI, 5232, Switzerland
Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, Grenoble, 38000, France
British Management University, 35 Mirza Bobur Street, Tashkent, Uzbekistan
Kazakh-British Technical University, 59 Tole Bi Street, Almaty, 050000, Kazakhstan
Cavendish Laboratory
Department of Chemistry
Laboratory for Neutron Scattering and Imaging
Institut Laue-Langevin (ILL)
British Management University
Kazakh-British Technical University
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