J M Cadogan, D H Ryan, R A Susilo, S Muñoz Pérez, R Cobas, N R Lee-Hone, B R Hansen, M Avdeev
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引用次数: 0
Abstract
The magnetic structure of the intermetallic compound ErGa has been determined using high-resolution neutron powder diffraction. This compound crystallizes in the orthorhombic (Cmcm, No. 63) CrB-type structure and orders ferromagnetically at 32 (2) K, with the Er moments initially aligned along the b axis. Upon cooling below 16 K, the Er magnetic moments cant away from the b axis towards the c axis. At 3 K, the Er moment is 8.7 (3) μB and the Er magnetic moments point in the direction 31 (3)° away from the crystallographic b axis, within the bc plane. 166Er Mössbauer spectroscopy work supports this structure and shows clear signals of the spin-reorientation in both the magnetic and electric quadrupole hyperfine interactions.
利用高分辨率中子粉末衍射测定了金属间化合物 ErGa 的磁性结构。该化合物以正交（Cmcm，63 号）CrB 型结构结晶，在 32 (2) K 时产生铁磁性，Er 磁矩最初沿 b 轴排列。冷却到 16 K 以下时，Er 磁矩从 b 轴向 c 轴偏移。在 3 K 时，Er 磁矩为 8.7 (3) μB，Er 磁矩指向 bc 平面内偏离晶体学 b 轴 31 (3) ° 的方向。166Er 莫斯鲍尔光谱分析结果支持这一结构，并在磁场和电场四极超频相互作用中显示出明显的自旋定向信号。
期刊介绍：
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials publishes scientific articles related to the structural science of compounds and materials in the widest sense. Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understanding physical and chemical phenomena and is crucial for the design of new materials and supramolecular devices. Acta Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical approaches, including crystal-structure prediction, structure-property relations and the use of databases of crystal structures, are published.
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