Seminarium Fizyki Ciała Stałego

GaN enriched with Mn constitutes worthwhile material system whose magnetic characteristics are set by the d-level occupancy of the Mn ions. Basing on the results of a wide temperature range magnetometry (down to 0.5 K) obtained for very high quality GaN:Mn crystals (grown by HVPE method) we will re-visit the crystal field model and show that aided by EPR results, an accurate spin counting of d5 and d4 levels is possible – constituting an indispensable characterization tool for these commercially important crystals. Next we will proceed to much concentrated epitaxial (Ga,Mn)N layers with Mn contents approaching 10%. Here, superexchange-mediated ferromagnetism develops at the low end of cryogenic temperatures. The magnetic anisotropy of such systems will be discussed and some possible means of its control will be presented.UwagaSeminarium w trybie HybrydowymFaculty of Physics room 0.06patrz instrukcja :instrukcja: (pdf file)AttentionThe seminar in the Hybrid modeFaculty of Physics room 0.06see instruction :instruction: (pdf file)