Magnetoelastic coupling in the stretched diamond lattice of TbTaO${}_4$

Abstract

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 Tb${}^{3+}$ (4$f^8$) in M-TbTaO${}_4$ on application of a magnetic field. We have investigated the structural and magnetic properties of M phase terbium tantalate M-TbTaO${}_4$ as a function of temperature and magnetic field using magnetometry and powder neutron diffraction. Sharp $\lambda$-shape transitions in $d(\chi T)/dT$, $dM/dH$ and specific heat data confirm the previously reported three-dimensional (3D) antiferromagnetic ordering at $T_N\approx 2.25$ K. On application of a magnetic field the Néel temperature is found to decrease and variable field neutron diffraction experiments below $T_N$ 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-TbTaO${}_4$ as a function of temperature and field.

9 pages main text plus 12 pages supplemental information

References in corpus (11)

• Order by disorder and spiral spin liquid in frustrated diamond lattice antiferromagnets
• Dynamically-Induced Frustration as a Route to a Quantum Spin Ice State in Tb2Ti2O7 via Virtual Crystal Field Excitations and Quantum Many-Body Effects
• Topological Paramagnetism in Frustrated Spin-One Mott Insulators
• Spin order and dynamics in the diamond-lattice Heisenberg antiferromagnets CuRh2O4 and CoRh2O4
• Generic Spiral Spin Liquids
• Frustrated Heisenberg $J_1-J_2$ model within the stretched diamond lattice of LiYbO2
• Experimental Evidence for the Spiral Spin Liquid in LiYbO${}_2$
• Antiferromagnetism and crystalline-electric field excitations in tetragonal NaCeO2
• Magnetism on the stretched diamond lattice in lanthanide orthotantalates
• Electronic structure of the frustrated diamond lattice magnet NiRh${}_2$O${}_4$
• Novel magnetic ordering in LiYbO2 probed by muon spin relaxation

Cited by in corpus (2)

• High-pressure synthesis of quantum magnet M-YbTaO4 with a stretched diamond lattice
• Bulk magnetic properties of distorted square lattice compounds M'-LnTaO4 (Ln = Tb, Dy, Ho, Er)