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We report on single-crystal growths of the SrTb$_2$O$_4$ compound by asuper-necking technique with a laser-floating-zone furnace and study thestoichiometry, growth mode, and structural and magnetic properties by scanningelectronic microscopy, neutron Laue, X-ray powder diffraction, and the physicalproperty measurement system. We optimized the growth parameters, mainly thegrowth speed, atmosphere, and the addition of a Tb$_4$O$_7$ raw material.Neutron Laue diffraction displays the characteristic feature of a singlecrystal. Our study reveals an atomic ratio of Sr:Tb $ = 0.97(2){:}2.00(1)$ anda possible layer by layer crystal growth mode. Our X-ray powder diffractionstudy determines the crystal structure, lattice constants and atomic positions.The paramagnetic (PM) Curie--Weiss (CW) temperature $\theta_{\texttt{CW}} =$5.00(4) K, and the effective PM moment $M^{\texttt{eff}}_{\texttt{mea}} =$10.97(1) $\mu_\texttt{B}$ per Tb$^{3+}$ ion. The data of magnetization versustemperature can be divided into three regimes, showing a coexistence ofantiferromagnetic and ferromagnetic interactions. This probably leads to themagnetic frustration in the SrTb$_2$O$_4$ compound. The magnetization at 2 Kand 14 T originates from both the Tb1 and Tb2 sites and is strongly frustratedwith an expected saturation field at $\sim$41.5 T, displaying an intricatephase diagram with three ranges.

Super-Necking Crystal Growth and Structural and Magnetic Properties of SrTb$_2$O$_4$ Single Crystals