A plethora of magnetic ground states along with intriguing magnetic properties have been reported in thin films of Mn-containing MAX phases. However, fewer results and therefore less knowledge in the area of bulk magnetic MAX phases exist resulting in many open research questions that still remain unanswered. Synthesis of high quality materials is key and is here achieved for bulk V₂AlC and its Mn-doped analogs by means of microwave heating and spark plasma sintering. The obtained materials are carefully characterized by structural and microstructural investigations resulting in an average Mn-content of 2% corresponding to the mean chemical composition of (V_0.96±0.02Mn_0.04±0.02)₂AlC in the Mn-doped V₂AlC samples. While the parent MAX phase as well as the sample with the nominally lowest Mn-content are obtained essentially single-phase, samples with higher Mn-levels exhibit Mn-rich side phases. These are most likely responsible for the ferromagnetic behavior of the corresponding bulk materials. Besides, we show Pauli paramagnetism of the parent compound V₂AlC and a combination of Pauli and Langevin paramagnetism in (V_0.96±0.02Mn_0.04±0.02)₂AlC. For the latter, a magnetic moment of μ_M = 0.2(2) μ_B per M atom can be extracted.

中文翻译：

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非常规制备的MAX相V ₂ AlC和（V / Mn）₂ AlC的结构，磁和电传输性质†

在含Mn的MAX相的薄膜中，已经报道了过多的磁性基态以及令人感兴趣的磁性。但是，结果较少，因此在体磁MAX相领域的知识较少，导致许多悬而未决的研究问题仍未得到解答。高质量材料的合成是关键，在此可以通过微波加热和火花等离子体烧结实现大体积的V ₂ AlC及其Mn掺杂的类似物。通过结构和微结构研究对所得材料进行仔细表征，得出平均Mn含量为2％，相当于Mn掺杂V _2中的（V _0.96±0.02 Mn _0.04±0.02）₂ AlC的平均化学组成。AlC样品。虽然获得的母体MAX相以及标称Mn含量最低的样品基本上是单相，但Mn含量较高的样品却表现出Mn富集的侧相。这些最有可能导致相应的块状材料的铁磁行为。此外，我们在（V _0.96±0.02 Mn _0.04±0.02）₂ AlC中显示了母体化合物V ₂ AlC的Pauli顺磁性以及Pauli和Langevin顺磁性的组合。对于后者，的磁矩μ_中号= 0.2（2）μ_乙可以提取使用M原子。