论文标题
沮丧的钻石晶格抗Fiferromagnet MNSC $ _2 $ SE $ _4 $
Magnetic order and exchange couplings in the frustrated diamond lattice antiferromagnet MnSc$_2$Se$_4$
论文作者
论文摘要
我们报告了$ A $ A-Site Spinel Compound Mnsc $ _2 $ SE $ _4 $的磁性属性。宏观磁性测量结果在$ t _ {\ rm {\ rm {n1}} $ = 2.04 K处发现连续的磁过渡，然后在$ t _ {\ rm {n2}}} $ = 1.8 k和$ = 1.8 k和$ t _ { $ t _ {\ rm {n2}} <t <t <t _ {\ rm {n1}} $和$ t <t <t _ {\ rm {n3}} $，订单与宣传$ k $ =（3/4 3/4 0）相关，而磁性结构是磁性结构的，而磁性效果是colline and的。使用中子粉末光谱法证明了SE取代S对磁交换的影响。由于MNSC $ _2X_4 $（$ x $ = S，SE）尖晶石的化学压力，自旋波激发的能量范围被刺激了。
We report the magnetic properties of $A$-site spinel compound MnSc$_2$Se$_4$. The macroscopic magnetic measurements uncovers successive magnetic transitions at $T_{\rm{N1}}$= 2.04 K, followed by two further transitions at $T_{\rm{N2}}$=1.8 K and $T_{\rm{N3}}$=1.6 K. Neutron powder diffraction reveals that both, $T_{\rm{N2}} < T < T_{\rm{N1}}$ and $T <T_{\rm{N3}}$, orders are associated with the propagation vector $k$=(3/4 3/4 0), while the magnetic structures are collinear amplitude modulated and helical, respectively. Using neutron powder spectroscopy we demonstrated the effect of substitution of S by Se on the magnetic exchange. The energy range of the spin-wave excitations is supressed due to the chemical pressure of the $X$- ion in MnSc$_2X_4$ ($X$=S, Se) spinels.
