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Li2 MnSnSe4 : A New Quaternary Diamond-Like Semiconductor with Nonlinear Optical Response and Antiferromagnetic
Xiaoshuang Li1,2, Chao Li1,3, Molin Zhou1,4
1Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Abstract:
A new selenide with a diamond-like structure, Li2 MnSnSe4 , was synthesized for the first time by using a conventional high-temperature solid-state reaction method. Li2 MnSnSe4 crystallizes in the space group Pmn21 (no. 31) of the orthorhombic system. Its three-dimensional framework is constructed by corner-sharing LiSe4 , MnSe4 , and SnSe4 tetrahedra. The title compound has been discovered to have both type I phase-matchable behavior and to exhibit moderate powder second-harmonic generation intensity, about 0.5 times that of commercial AgGaS2 in the particle size of 200-250 μm at a laser radiation of 2.09 μm. In addition, Li2 MnSnSe4 exhibits congruent melting behavior, which makes the bulk single-crystal growth by the Bridgman-Stockbarger method possible. The temperature-dependent susceptibility measurement indicates an antiferromagnetic interaction with a Néel temperature (TN ) of 8.6 K for this compound.
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