Abstract
Interesting possibilities of application gives co‐occurrence of ferroelectric and ferromagnetic properties. GeMnTe is known to possess such unique properties. Here, we report preliminary AC magnetic susceptibility and magnetization studies of GeMnTe co‐doped with another magnetic ion — Europium, aimed at investigating of Eu ions influence on the magnetic properties of the resulting quaternary compound. We found that the Curie temperature of GeMnEuTe substantially (about 3 times) exceeds the values of TC reported in GeMnTe crystals and layers with similar Mn composition, equal ∼40 K. The origin of this substantial Curie temperature enlargement is not fully explained yet. However, the spin‐echo resonance data may suggest that the Mn2+ ions system is in a mixed valence state and that an additional channel of interaction between magnetic ions is open.
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