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Magnetic Properties of the Melilite-Type Oxysulfide Sr2MnGe2S6O: Magnetic Interactions Enhanced by Anion Substitution
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-02-15 00:00:00 , DOI: 10.1021/acs.inorgchem.6b02505 Takashi Endo , Yoshihiro Doi , Makoto Wakeshima , Keita Suzuki , Yasutaka Matsuo , Keitaro Tezuka 1 , Takuya Ohtsuki 1 , Yue Jin Shan 1 , Yukio Hinatsu
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-02-15 00:00:00 , DOI: 10.1021/acs.inorgchem.6b02505 Takashi Endo , Yoshihiro Doi , Makoto Wakeshima , Keita Suzuki , Yasutaka Matsuo , Keitaro Tezuka 1 , Takuya Ohtsuki 1 , Yue Jin Shan 1 , Yukio Hinatsu
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The synthesis, crystal structures, photoluminescence, and magnetic properties of the melilite-type oxysulfide Sr2MnGe2S6O were investigated. This compound crystallizes in the melilite structure with space group P4̅21m, in which two kinds of anions, S2– and O2–, occupy different crystallographic sites in an ordered manner. The temperature dependence of the magnetic susceptibility of Sr2MnGe2S6O shows a broad peak due to a two-dimensional magnetic interaction between Mn ions in the ab plane. The specific heat data show that this compound has an antiferromagnetic transition temperature (TN = 15.5 K) that is much higher than that of the oxide analogue Sr2MnGe2O7 (TN = 4.4 K). DFT calculations showed that the magnetic interaction is enhanced by covalency in the Mn–S bonding.
中文翻译：
melilite型氧硫化物Sr 2 MnGe 2 S 6 O的磁性：阴离子取代增强了磁性相互作用。
研究了硅铝石型氧硫化物Sr 2 MnGe 2 S 6 O的合成，晶体结构，光致发光和磁性。该化合物结晶在黄长石结构，空间群P 42 1米，在将2种阴离子，S 2-和O 2-，占据以有序的方式不同的结晶位点。Sr的磁化率对温度的依赖性2 MNGE 2小号6 ö所示的宽峰由于Mn离子之间的二维磁相互作用AB飞机。比热数据表明，该化合物具有反铁磁性转变温度（Ť Ñ = 15.5 K）是比氧化物类似物Sr中高得多的2 MNGE 2 ö 7（Ť Ñ = 4.4 K）。DFT计算表明，Mn-S键的共价性增强了磁性相互作用。
更新日期：2017-02-15
中文翻译：
melilite型氧硫化物Sr 2 MnGe 2 S 6 O的磁性：阴离子取代增强了磁性相互作用。
研究了硅铝石型氧硫化物Sr 2 MnGe 2 S 6 O的合成，晶体结构，光致发光和磁性。该化合物结晶在黄长石结构，空间群P 42 1米，在将2种阴离子，S 2-和O 2-，占据以有序的方式不同的结晶位点。Sr的磁化率对温度的依赖性2 MNGE 2小号6 ö所示的宽峰由于Mn离子之间的二维磁相互作用AB飞机。比热数据表明，该化合物具有反铁磁性转变温度（Ť Ñ = 15.5 K）是比氧化物类似物Sr中高得多的2 MNGE 2 ö 7（Ť Ñ = 4.4 K）。DFT计算表明，Mn-S键的共价性增强了磁性相互作用。
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