Antiferromagnetic-ferromagnetic phase transition in (Zn,Sn,Mn)As-2 epitaxial thin films

作者：Hidaka Shiro^*; Toyota Hideyuki; Uchitomi Naotaka

来源：Applied Physics Letters, 2017, 110(13): 132410.

DOI：10.1063/1.4979555

The magnetization of (Zn,Sn,Mn)As-2 thin films epitaxially grown on InP(001) substrates exhibited an anomalous temperature dependence, increasing slightly with temperature, compared with estimates based on the mean-field theory (MFT). Assuming that ferromagnetic (FM) and antiferromagnetic (AF) phases coexist at low temperature, these anomalous magnetic properties can be well explained by an AF-FM transition through a paramagnetic phase. The Neel temperature T-N of the AF phase is estimated from the threshold of the difference curve between the experimental and theoretical data, assuming the magnetization of the FM phase, which follows the MFT. The estimated T-N rapidly increases by similar to 50K in the range of Mn concentrations where the hexagonal MnAs (h-MnAs) phase precipitates. This can be explained by the superparamagnetic behavior of the precipitated h-MnAs nanoclusters, which possess a high blocking temperature. Published by AIP Publishing.

• 出版日期2017-3-27