Magnetic structure and properties of Cu3(OH)4SO4 made of triple chains of spins s=1/2
Magnetic structure and properties of Cu3(OH)4SO4 made of triple chains of spins s=1/2
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DOI：
10.1016/s0022-4596(02)00081-6
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发表时间：
2003-02
影响因子：
3.3
通讯作者：
S. Vilminot;M. Richard-Plouet;G. André;D. Świerczyński;M. Guillot;F. Bourée-Vigneron;M. Drillon
中科院分区：
文献类型：
--
作者：
S. Vilminot;M. Richard-Plouet;G. André;D. Świerczyński;M. Guillot;F. Bourée-Vigneron;M. Drillon
由硫酸铜和纯碱水热合成的Cu3（OH）4SO4与相应的铁角闪石矿物为等结构，正交晶系，空间群为Pnma（62），a=8.289（1），B=6.079（1），c=12.057（1），V=607.5（2）3，Z=4。它的晶体结构已从X射线单晶和粉末中子衍射数据在室温下精制。它由铜（II）三重链组成，在b轴方向上运行，并通过硫酸根基团相互连接。根据磁化率和比测量所证实的5K转变温度以下的1.4K粉末中子衍射数据所求解的磁结构表明，在三重链中，铜离子的磁矩（μB=0.88（5）在1.4K）属于外链的取向沿着核细胞的c轴，在链内部具有铁磁序，在两个外链之间具有反铁磁序。没有长程磁序得到沿着与闲置自旋行为的中心链。
Cu3(OH)4SO4, obtained by hydrothermal synthesis from copper sulfate and soda in aqueous medium, is isostructural with the corresponding antlerite mineral, orthorhombic, space group Pnma (62), with a=8.289(1) b=6.079(1) and c=12.057(1)Å, V=607.5(2) Å3, Z=4. Its crystalline structure has been refined from X-ray single crystal and powder neutron diffraction data at room temperature. It consists of copper (II) triple chains, running in the b-axis direction and connected to each other by sulfate groups. The magnetic structure, solved from powder neutron diffraction data at 1.4K below the transition at 5K evidenced by susceptibility and specific measurements, reveals that, inside a triple chain, the magnetic moments of the copper ions (μB=0.88(5) at 1.4K) belonging to outer chains are oriented along the c-axis of the nuclear cell, with ferromagnetic order inside a chain and antiferromagnetic order between the two outer chains. No long-range magnetic order is obtained along the central chain with an idle spin behavior.