ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Zn-Mn-O semiconductor crystallites with nominal manganese concentration x = 0.01,0.02, 0.04 and 0.10 were synthesized by a solid state reaction route using oxalate precursors.Thermal treatment procedure was carried out in air at different temperatures in the range 400 -900°C. The samples were investigated by X-ray diffraction, magnetization measurements andelectron paramagnetic resonance. X-ray analysis reveals that dominant crystal phase in theZn-Mn-O system corresponds to the wurtzite structure of ZnO. Room temperature ferromagnetismis observed in the Zn-Mn-O samples with lower manganese concentration, x ≤ 0.04, thermallytreated at low temperature (500°C). Saturation magnetization in the sample with x = 0.01 is foundto be 0.05 μB/Mn. The ferromagnetic phase seems to be developed by Zn diffusion into Mn-oxidegrains
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.555.95.pdf
