论文标题
元素特异性场诱导的自旋重新定位和MNCR2S4中的异常四力当点
Element-specific field-induced spin reorientation and an unusual tetracritical point in MnCr2S4
论文作者
论文摘要
铁磁性尖晶石MNCR2S4由于粘结挫败和强旋晶格耦合而显示出多种磁场诱导的相变。然而，在高磁场中相应场诱导的相位的位置分辨磁性能仍然难以捉摸。我们的软X射线磁性圆形二色性研究在现场诱导的相中，多达40吨直接证明元素选择性磁性的重新定位。复杂的磁结构通过从磁环效效应测量中提取的熵变化进一步支持。此外，热力学实验揭示了由于强旋晶格耦合而导致的MNCR2S4的H-T相图中的一个异常的四出相点。
The ferrimagnetic spinel MnCr2S4 shows a variety of magnetic-field-induced phase transitions owing to bond frustration and strong spin-lattice coupling. However, the site-resolved magnetic properties at the respective field-induced phases in high magnetic fields remain elusive. Our soft x-ray magnetic circular dichroism studies up to 40 T directly evidence element-selective magnetic-moment reorientations in the field-induced phases. The complex magnetic structures are further supported by entropy changes extracted from magnetocaloric-effect measurements. Moreover, thermodynamic experiments reveal an unusual tetracritical point in the H-T phase diagram of MnCr2S4 due to strong spin-lattice coupling.
