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X-ray diffractograms of GaN powders (a) and nanoceramics (b).
Volume magnetization vs temperature for GaN nanoceramic prepared from the nanopowders sintered at . (ZFC-FC measurements with additionally sweeping temperature up and down for FC sample.)
Magnetic hysteresis for GaN nanoceramic prepared from nanopowders obtained at measured at and [signal of empty sample holder is added for comparison (broken line)]. Inset: expanded scale of field axis.
Magnetization vs magnetic field for different temperatures for GaN nanoceramic prepared from nanopowders sintered at .
Mean grain sizes of GaN nanopowders and nanoceramics. Symbols , mean size of grain of GaN nanopowder; , mean size of nanocrystallite of GaN nanoceramic (both calculated using the Scherrer formula).
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