Quasi-two-dimensional magnetism in spin- square lattice compound Cu[C6H2(COO)4][H3N-(CH2)2-NH3]3H2O,EPL

当前位置： X-MOL 学术 › EPL › 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.)

Quasi-two-dimensional magnetism in spin- square lattice compound Cu[C6H2(COO)4][H3N-(CH2)2-NH3]3H2O
EPL ( IF 1.8 ) Pub Date : 2021-04-29 , DOI: 10.1209/0295-5075/133/57006
S. Guchhait ₁ , S. Baby ₂ , M. Padmanabhan ₃ , A. Medhi ₁ , R. Nath ₁

Affiliation

We report the crystal growth and structural and magnetic properties of quasi-two-dimensional $S=1/2$ quantum magnet Cu[C₆H₂(COO)₄][H₃N-(CH₂)₂-NH₃] ${}\cdot{}$ 3H₂O. It is found to crystallize in a monoclinic structure with space group $C2/m$ . The CuO₄ plaquettes are connected into a two-dimensional framework in the ab-plane through the anions of[C₆H₂(COO)₄]⁴⁻ (pyromellitic acid). The[H₃N-(CH₂)₂-NH₃] $^{2+}{}\cdot{}$ 3H₂O groups are located between the layers and provide a weak interlayer connection via hydrogen (H...O) bonds. The temperature-dependent magnetic susceptibility is well described by $S=1/2$ frustrated square lattice $(J_1-J_2)$ model with nearest-neighbor interaction $J_1/k_{\text B} \simeq 5.37\ \text{K}$ and next-nearest-neighbor interaction $J_2/k_{\text B} \simeq -0.37\ \text{K}$ . Our analysis using frustrated rectangular lattice $(J_{1a,b}-J_2)$ model also confirms almost isotropic nearest-neighbour interactions ( $J_{1{\text a}}/k_{\text B} \simeq 5.31\ \text{K}$ and $J_{1{\text b}}/k_{\text B} \simeq 5.38\ \text{K}$ ) in the ab-plane and $J_2/k_{\text B}\simeq-0.24\ \text{K}$ . Further, the isothermal magnetization at $T=1.9\ \text{K}$ is also well described by a non-frustrated square lattice model with $J_1/k_{\text B} \simeq 5.2\ \text{K}$ . Based on the $J_2/J_1$ ratio, the compound can be placed in the Nel antiferromagnetic state of the $J_1 - J_2$ phase diagram. No signature of magnetic long-range order is detected down to 2 K.

中文翻译：

自旋 ${\frac{1}{2}}$ 方格化合物Cu[C ₆ H ₂ (COO) ₄ ][H ₃ N-(CH ₂ ) ₂ -NH ₃ ]3H ₂ O中的准二维磁性

我们报告了准二维 $S=1/2$ 量子磁体 Cu[C ₆ H ₂ (COO) ₄ ][H ₃ N-(CH ₂ ) ₂ -NH ₃ ] ${}\cdot{}$ 3H ₂ O的晶体生长、结构和磁性能。发现以具有空间群的单斜结构结晶 $C2/m$ 。CuO ₄小块通过[C ₆ H ₂ (COO) ₄ ] ^4- (均苯四酸)的阴离子在ab平面中连接成二维框架。[H ₃ N-(CH ₂ ) ₂-NH ₃ ] $^{2+}{}\cdot{}$ 3H ₂ O 基团位于层之间，并通过氢 (H...O) 键提供弱的层间连接。温度相关的磁化率由具有最近邻相互作用和次最近邻相互作用的 $S=1/2$ 受抑方形晶格 $(J_1-J_2)$ 模型很好地描述。我们使用受挫矩形晶格模型的分析也证实了ab平面和中几乎各向同性的最近邻相互作用（和）。此外，在的等温磁化强度也可以通过具有的非受阻方形晶格模型很好地描述。基于 $J_1/k_{\text B} \simeq 5.37\ \text{K}$ $J_2/k_{\text B} \simeq -0.37\ \text{K}$ $(J_{1a,b}-J_2)$ $J_{1{\text a}}/k_{\text B} \simeq 5.31\ \text{K}$ $J_{1{\text b}}/k_{\text B} \simeq 5.38\ \text{K}$ $J_2/k_{\text B}\simeq-0.24\ \text{K}$ $T=1.9\ \text{K}$ $J_1/k_{\text B} \simeq 5.2\ \text{K}$ $J_2/J_1$ 比，该化合物可以置于 $J_1 - J_2$ 相图的 Nel 反铁磁状态。未检测到低至 2 K 的磁性长程有序特征。

更新日期：2021-04-29

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>