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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis, crystal structure and properties of RbMnO2
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Synthesis, crystal structure and properties of RbMnO2

机译:RbMnO2的合成,晶体结构与性能

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RbMnO2 was prepared via the azideitrate route. Stoichiometric mixtures of the precursers (Mn2O3, RbN3 and RbNO3) were heated in a special regime up to 600 C and annealed at this temperature for 30 h in specially designed silver crucibles. Single crystals have been grown by annealing a 1:1 mixture of Rb2O and MnOx at 585 C for 1200 h. According to the crystal structure determination Mn3+ is in a square-pyramidal coordination by oxygen. These [MnO5] units form double chains extending along the crystallographic c-axis. RbMnO2 shows Curie-Weiss behaviour down to similar to 100 K. A fit of the susceptibility data yields an average value of the magnetic moment (per manganese atom) of mu(eff) = 5.33 mu(B), and theta(P) = -820 K. At 50 K and low field strength onset of ferromagnetic order due to spin canting has been observed.
机译:通过叠氮化物/硝酸盐路线制备RbMnO 2。将前体的化学计量混合物(Mn2O3,RbN3和RbNO3)以特殊方式加热到600℃,并在此温度下在专门设计的银坩埚中退火30小时。通过在585℃下将1:1的Rb2O和MnOx混合物退火1200 h,可以生长出单晶。根据晶体结构的确定,Mn 3+被氧以正方形-金字塔形配位。这些[MnO5]单元形成沿着晶体学c轴延伸的双链。 RbMnO2的居里-魏斯行为低至接近100K。磁化率数据的拟合得出的磁矩(每个锰原子)的平均值为mu(eff)= 5.33 mu(B),theta(P)= -820K。在50 K和低场强下,已经观察到由于自旋倾斜引起的铁磁有序出现。

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