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首页> 外文期刊>Physica, B. Condensed Matter >Magnetic phase diagram of Li[MgxMn2-x]O-4 (0 = x = 1/2) spinel
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Magnetic phase diagram of Li[MgxMn2-x]O-4 (0 = x = 1/2) spinel

机译：Li [MgxMn2-x] O-4（0 <= x <= 1/2）尖晶石的磁相图

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摘要

The magnetic nature of the Li[MgxMn2-x]O-4 spinel with x = 0, 1/8, 1/4, 3/8, and 1/2 was studied by susceptibility and mu+SR measurements. As x increases from 0, T-N (= 61 K) rapidly drops down to 29 K (= T-c) for the x = 1/8 sample, and then decreases slowly with further increasing x. The sample with x = 1/2, in which Mg2+ and Mn4+ ions order to form a 1:3 superlattice, exhibits a sharp ferromagnetic (FM) hysteresis below 15 K The analysis of the ZF-spectrum implies the possibility that the FM order is incommensurate to the lattice. For the samples with 0 < x < 1/2, although the lattice parameter and effective magnetic moment of Mn ions vary monotonically with x, the magnetization at 5 kOe increases in proportion to x, suggesting the existence of FM clusters probably formed by the x = 1/2 phase. Considering the results of related spinels, the cation distribution/concentration or occupancy at the octahedral site is likely to be a good indicator for the appearance of FM order in Li[MgxMn2-x]O-4.
机译：通过磁化率和mu + SR测量研究了x = 0、1 / 8、1 / 4、3 / 8和1/2的Li [MgxMn2-x] O-4尖晶石的磁性。当x从0开始增加时，对于x = 1/8的样本，T-N（= 61 K）迅速下降至29 K（= T-c），然后随着x的进一步增加而缓慢下降。 x = 1/2的样品中，Mg2 +和Mn4 +离子形成1：3超晶格，在15 K以下显示出尖锐的铁磁（FM）磁滞。ZF谱的分析表明FM阶为与晶格不相称。对于0

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