Abstract
The effect of temperature on the ferromagnetic properties, observed in chemically synthesized Sn 1-xCo xO 2 powders at room temperature was studied. Magnetic hysteresis loops were observed at 300K with coercivity H c∼630 Oe, saturation magnetization M s∼0.133 μ B/Co ion, and 31% remanence. On measuring the magnetization data of the paramagnetic samples with x=0.01 and 0.03 as a function of temperature and and magnetic field, the presence of Co +2 ions with spin S=3÷2 was identified. The magnetic data also indicated that the observed ferromagnetism for x≤0.01 might have been triggered by changes in the oxygen stoichiometry.
| Original language | English |
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| Pages (from-to) | 1559-1561 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 85 |
| Issue number | 9 |
| DOIs | |
| State | Published - 30 Aug 2004 |