کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1595352 | 1002773 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The effect of Fe doping on structural, magnetic and electrical transport properties of CaMn1−xFexO3 (x=0–0.35) The effect of Fe doping on structural, magnetic and electrical transport properties of CaMn1−xFexO3 (x=0–0.35)](/preview/png/1595352.png)
A comprehensive study of the effect of Fe doping on CaMnO3 is carried out by means of experiments on the structural, transport conduction, and magnetic properties of CaMn1−xFexO3 (0≤x ≤0.35). With a sol–gel process for sample preparation, Fe is substituted for Mn up to x=0.35x=0.35. This substitution substantially brings out the lattice expansion and gradually suppresses the antiferromagnetism. For x=0.08x=0.08 and 0.10 in particular, the magnetization curves with a field-cooled mode under the field of 1 kOe behave as those of a ferrimagnetic-like system and present low-temperature negative magnetization. For x≥0.15x≥0.15, the negative magnetization phenomenon disappears, and a ferromagnetic component coexists with an antiferromagnetic one, but the antiferromagnetic interaction still dominates in these compounds. Electrical transport measurements show insulating behavior for all compositions. Fe doping, even at a level as low as x=0.02x=0.02, can cause a marked resistivity increase in the temperature range studied. Further increasing the Fe content causes the resistivity to gradually decrease due to the increasing carrier presence.
Journal: Solid State Communications - Volume 142, Issue 9, June 2007, Pages 525–530