Low temperature synthesis, structure and magnetic properties of Mn 2 [VO 4 ]F
Low temperature synthesis, structure and magnetic properties of Mn 2 [VO 4 ]F
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Mn 2 [VO 4 ]F的低温合成、结构及磁性能
DOI：
10.1016/j.jascer.2017.10.002
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发表时间：
2017
影响因子：
2.3
通讯作者：
Belharouak Ilias
中科院分区：
文献类型：
--
作者：
Mori Daisuke;Ben Yahia Hamdi;Shikano Masahiro;Imanishi Nobuyuki;Inaguma Yoshiyuki;Belharouak Ilias
采用低温水热法合成了Mn 2 [VO 4]F化合物，并通过X射线单晶衍射分析确定了其晶体结构。Mn 2 [VO 4]F的特征在于通过磁化率和比热容测量。Mn_2 [VO_4]F晶体为三重晶系，空间群C_2/c，a= 13.451（3）<$，B= 6.6953（16）<$，c= 10.126（3）<$，β= 116.587（4）°，V= 815.6（3）<$3，Z = 8。该结构由VO 4四面体和锰（II）多面体组成的三维框架组成，这些多面体形成沿[101]和[010]方向沿着运行的链。由于[001]中氟阴离子的无序排列，形成了沿着的锯齿形链状结构，使得锰离子的配位和锰多面体之间的连接性不明确。磁化率在50 K以上遵循居里-外斯行为，Θ= −88 K，表明主要的磁相互作用是反铁磁的。比热容和磁化强度的测量表明，Mn 2 [VO 4]F在TN = 30 K时具有三维磁有序性，由于混合阴离子效应，具有倾斜的弱铁磁性。
The compound Mn2[VO4]F was synthesized using a hydrothermal synthesis route at low temperature and its crystal structure was determined from single crystal X-ray diffraction data. Mn2[VO4]F was characterized by magnetic susceptibility and specific heat capacity measurements. Mn2[VO4]F crystallizes with the triplite-type structure, space groupC2/c,a= 13.451(3) Å,b= 6.6953(16) Å,c= 10.126(3) Å,β= 116.587(4)°,V= 815.6(3) Å3andZ= 8. The structure consists of a 3D-framework built up of VO4tetrahedra, and manganese (II) polyhedra which form chains running along the [101] and [010] directions. The coordination of the manganese cations and the connectivity between the manganese polyhedra are not defined clearly due to the disorder of the fluoride anions which form zigzag chains along [001]. The magnetic susceptibility follows a Curie–Weiss behavior above 50 K withΘ= −88 K indicating that predominant magnetic interactions are antiferromagnetic. The specific heat capacity and magnetization measurements show that Mn2[VO4]F undergoes a three-dimensional magnetic ordering atTN= 30 K and a canted weak ferromagnetism due to mixed-anion effect.