Dopant Distribution, Oxygen Stoichiometry and Magnetism of Nanoscale Sn0.99Co0.01O₂
Journal Article
·
· Solid State Communications, 139:434-438
In a recent work, we have shown that chemically synthesized Sn₁-xCoxO₂ nanoscale powders with x ≤ 0.01 are ferromagnetic at room-temperature when prepared by annealing the reaction precipitate in the narrow temperature window of 350 to 600 °C. Combined high resolution x-ray photoelectron spectroscopy and magnetometry measurements on as-prepared and Ar⁺ ion sputtered samples showed that a uniform distribution of Co observed in the 350-600 °C annealed Sn0.99Co0.01O₂ samples is essential to produce stable ferromagnetism, while surface segregation of the dopant atoms in samples annealed at >600 °C destroys it.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 892876
- Report Number(s):
- PNNL-SA-42658; 9995; KP1704020
- Journal Information:
- Solid State Communications, 139:434-438, Journal Name: Solid State Communications, 139:434-438
- Country of Publication:
- United States
- Language:
- English
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