当前位置：
X-MOL 学术
›
Inorg. Chem.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Experimental Evidence of the Coexistence of Proper Magnetic and Structural Incommensurability on the [CH3NH3][Ni(COOH)3] Compound
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-11-27 , DOI: 10.1021/acs.inorgchem.0c01722 Laura Cañadillas-Delgado 1 , Lidia Mazzuca 1 , Oscar Fabelo 1 , Juan Rodríguez-Carvajal 1 , Vaclav Petricek 2
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-11-27 , DOI: 10.1021/acs.inorgchem.0c01722 Laura Cañadillas-Delgado 1 , Lidia Mazzuca 1 , Oscar Fabelo 1 , Juan Rodríguez-Carvajal 1 , Vaclav Petricek 2
Affiliation
|
The present work is dedicated to characterization of the structural phase transition and incommensurate magnetic structure of the [CH3NH3][Ni(COOH)3] (1) perovskite-like metal–organic compound. The structural and magnetic characterization has been performed through variable-temperature single-crystal and powder neutron diffraction. Compound 1 crystallizes in the orthorhombic Pnma space group at room temperature. Below 84 K, a new phase has been observed. The occurrence of new reflections, which can be indexed with a wavevector along the c axis [q = 0.1426(2)c*], suggests the occurrence of an incommensurately modulated crystal structure. The structure was determined using the superspace group formalism on the Pnma(00γ)0s0 space group. This incommensurate phase remains unchanged with a decrease of the temperature up to the base temperature (ca. 2 K). Moreover, the magnetic susceptibility data, collected under zero-field-cooled and field-cooled conditions at different applied magnetic fields, show that compound 1 exhibits antiferromagnetic behavior below 34 K. In the current paper, we have confirmed that compound 1 presents the coexistence of nuclear and proper magnetic incommensurability below TN.
中文翻译：
[CH 3 NH 3 ] [Ni（COOH）3 ]化合物适当磁和结构不可共存共存的实验证据
本工作致力于表征[CH 3 NH 3 ] [Ni（COOH）3 ]（1）钙钛矿状金属有机化合物的结构相变和不等价的磁性结构。通过可变温度的单晶和粉末中子衍射进行了结构和磁性表征。化合物1在室温下在正交晶体Pnma空间群中结晶。低于84 K，观察到一个新的阶段。新反射的出现，可以用沿c轴的波矢索引[ q = 0.1426（2）c*]表示发生了不相称的调制晶体结构。使用Pnma（00γ）0 s 0空间群上的超空间群形式主义确定结构。随着温度降低到基本温度（约2 K），该不相称的相保持不变。此外，在不同施加磁场下在零场冷却和场冷却条件下收集的磁化率数据表明，化合物1在34 K以下具有反铁磁行为。在当前论文中，我们已经确认化合物1具有共存性T N以下的核和适当的磁不可通量的关系。
更新日期：2020-12-21
中文翻译：
[CH 3 NH 3 ] [Ni（COOH）3 ]化合物适当磁和结构不可共存共存的实验证据
本工作致力于表征[CH 3 NH 3 ] [Ni（COOH）3 ]（1）钙钛矿状金属有机化合物的结构相变和不等价的磁性结构。通过可变温度的单晶和粉末中子衍射进行了结构和磁性表征。化合物1在室温下在正交晶体Pnma空间群中结晶。低于84 K，观察到一个新的阶段。新反射的出现，可以用沿c轴的波矢索引[ q = 0.1426（2）c*]表示发生了不相称的调制晶体结构。使用Pnma（00γ）0 s 0空间群上的超空间群形式主义确定结构。随着温度降低到基本温度（约2 K），该不相称的相保持不变。此外，在不同施加磁场下在零场冷却和场冷却条件下收集的磁化率数据表明，化合物1在34 K以下具有反铁磁行为。在当前论文中，我们已经确认化合物1具有共存性T N以下的核和适当的磁不可通量的关系。
京公网安备 11010802027423号