Search

Recent results in the development of resistance thermometers based on germanium films on gallium arsenide are summarized. Preliminary results in the development of a new generation of radiation-resistant thermometers and multifunction sensors intended for use in the range 0.03 to 500 K in the presence of high magnetic fields are discussed. These sensors have been produced in an international collaboration recently funded through the EU INTAS program. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]

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. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]