In the present paper, polycrystalline samples of LiInCr_4-xMn_xO₈ varying from 0.0 to 0.5 were synthesized by the solid state method. In order to explore the effect of substitution Cr by Mn in LiInCr₄O₈, the structural, magnetic and dielectric properties are studied. The result of XRD patterns show that there is a nonmonotonic expansion in the lattice parameter, which may be due to ions disorder or/and partial exchange between A- and B-atoms. The SEM micrographs show that the Mn substituted samples are smaller in the average crystallite size and more agglomerated than the parent material. Magnetization data show the nonmonotonic variation of the effective magnetic moment and Curie-Weiss temperature, the suppressed long-range antiferromagnetic (AFM) order and spin gap, and occurence of a spin glasslike state. Although the breathing pyrochlore lattice is robust against doping, only 5% doping concentration (x=0.2) makes the spin gap vanish absolutely. The increased B_f makes the pyrochlore lattice more uniform, leading to the disappearance of the spin gap. The dielectric data show that Mn doping increases the dielectric constant and decreases dielectric loss at room temperature, thus these compounds should be satisfactory to the possible application in microelectronics. The result of heat capacity also verifies glass-type insulator state.

在本文中，LiInCr _{4- x} Mn _x O _{8 的}多晶样品从 0.0 到 0.5 不等，是通过固态方法合成的。为探讨LiInCr ₄ O _{8 中}Mn置换Cr的效果，研究了结构、磁性和介电特性。XRD图谱结果表明晶格参数存在非单调膨胀，这可能是由于离子无序或/和A-和B-原子之间的部分交换。SEM 显微照片显示，Mn 取代样品的平均晶粒尺寸更小，并且比母材更团聚。磁化数据显示有效磁矩和居里-魏斯温度的非单调变化、受抑制的长程反铁磁 (AFM) 顺序和自旋间隙，以及自旋玻璃状状态的出现。虽然呼吸烧绿石晶格对掺杂有很强的抵抗力，但只有 5% 的掺杂浓度 ( x = 0.2)才能使自旋间隙完全消失。增加的B _f使烧绿石晶格更均匀，导致自旋间隙消失。介电数据表明，Mn掺杂增加了介电常数并降低了室温下的介电损耗，因此这些化合物应该可以满足微电子中可能的应用。热容量的结果也验证了玻璃型绝缘体的状态。