Capone M, Ridley C J, Funnell N P, Stenning G B G, Loveday J S, Guthrie M, Bull C L
STFC ISIS Facility, Rutherford Appleton Laboratory, Harwell, OX11 0QX, United Kingdom. European Spallation Source AB, PO Box 176, SE-22100, Lund, Sweden. Centre for Science at Extreme Conditions and School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, United Kingdom.
J Phys Condens Matter. 2018 Jan 24;30(3):035402. doi: 10.1088/1361-648X/aaa042. Epub 2017 Dec 21.
The structural and magnetic properties of LaCoMnO have been studied as a function of pressure by neutron powder diffraction and DC magnetometry. The material is confirmed to exhibit rhombohedral R [Formula: see text] c symmetry between ambient pressure and 6 GPa. We have determined the bulk modulus B of the sample using a second-order Birch-Murnaghan equation of state which yielded: B = 140(9) GPa and V [Formula: see text]. We report a non-linear increase of the Curie temperature T from an ambient pressure value of 224.7 K to ∼236 K at a pressure of 4 GPa. Finally, we confirm the glassy-like nature of the magnetism in LaCoMnO, which is maintained throughout the pressure range explored.
通过中子粉末衍射和直流磁强计研究了LaCoMnO的结构和磁性随压力的变化。证实该材料在环境压力至6 GPa之间呈现菱面体R[公式：见正文]c对称性。我们使用二阶Birch-Murnaghan状态方程确定了样品的体积模量B，结果为：B = 140(9) GPa和V[公式：见正文]。我们报告了居里温度T从环境压力下的224.7 K非线性增加到4 GPa压力下的约236 K。最后，我们证实了LaCoMnO中磁性的类玻璃性质，这种性质在整个探索的压力范围内都保持不变。
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