论文标题
磁性顺序的相互作用和铁弹性在旋转轨道耦合抗铁磁铁K $ _2 $ secl $ _6 $
Interplay of magnetic order and ferroelasticity in the spin-orbit coupled antiferromagnet K$_2$ReCl$_6$
论文作者
论文摘要
通过宏观和微观技术研究了K $ _2 $ scl $ _6 $中发生的磁相变。与secl $ _6 $ contahedra旋转相关的结构相变降低了从立方体到单斜的对称性，形成铁弹性域，并且在敏感性，特定的热量和热膨胀测量中可见。在抗铁磁有序状态下，略低于$ t _ {\ rm n} $ = 12 \，k可以通过磁场来重新排列这些域，从而诱导与0.6 \％的磁场平行的多域晶体的相对伸长。在零字段，k $ _2 $ recl $ _6 $中的磁性结构不会表现出弱铁磁成分，但是在大磁场下，具有有限的弱铁磁成分的独特磁性结构稳定。高磁场重新排列晶体中的结构域，以对齐与田间平行的弱铁磁矩。随着晶体伸长的变化域结构在较低的温度下突然抑制，但在加热至较高的$ t _ {\ rm n} $时持续存在。但是，在最低的结构相变和连续冷却以上的加热恢复了初始形状。
The magnetic and structural phase transitions occurring in K$_2$ReCl$_6$ were studied by macroscopic and microscopic techniques. Structural phase transitions associated with rotations of the ReCl$_6$ octahedra lower the symmetry from cubic to monoclinic, form ferroelastic domains, and are visible in susceptibility, specific heat and thermal expansion measurements. In the antiferromagnetically ordered state slightly below $T_{\rm N}$=12\,K these domains can be rearranged by a magnetic field inducing a relative elongation of the polydomain crystal parallel to the field of 0.6\%. At zero field the magnetic structure in K$_2$ReCl$_6$ does not exhibit a weak ferromagnetic component, but at large magnetic field a distinct magnetic structure with a finite weak ferromagnetic component is stabilized. High magnetic fields rearrange the domains in the crystal to align the weak ferromagnetic moment parallel to the field. The altered domain structure with the crystal elongation is abruptly suppressed at lower temperature but persists upon heating to well above $T_{\rm N}$. However, heating above the lowest structural phase transition and successive cooling restore the initial shape.
