In Situ Composites of ${\alpha } $ -CoxFe2–xO3 With ${\varepsilon } $ -CoxFe2–xO3 or With Co–Fe Alloys Having Different Morphology and Better Magnetic Behavior

One-dimensional magnetic materials find several applications in modern technology. Co-Fe alloys and their oxides Co
_x
Fe
_2-x
O
₃
(0 ≤ × ≤ 0.7) were prepared using a very simple and novel technique. The X-ray diffraction patterns confirm the coexistence α-Fe
₂
O
₃
and ε-Fe
₂
O
₃
phases in the as-prepared as well as the sample sintered in N
₂
atmosphere. In contrast, samples sintered in H
₂
atmosphere could provide Co-Fe alloys and α-Fe
₂
O
₃
composites. Nanorod shapes for oxide samples were corroborated by scanning and transmission electron microscopy. A reasonably high coercivity value (~118 mT) was observed for such rods, whereas a sufficiently high saturation magnetization value near 162 Am
²
/kg was obtained for other types of composites.