کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1802318 | 1024595 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structural, chemical and magnetic investigations of polycrystalline Zn1−xMnxO Structural, chemical and magnetic investigations of polycrystalline Zn1−xMnxO](/preview/png/1802318.png)
Present study reports the detailed structural and magnetic, as well as chemical analysis of polycrystalline Zn1−xMnxO (where x=0, 0.005, 0.01, 0.03, 0.05 and 0.1) samples synthesized by the high-temperature solid state reaction route. X-ray diffraction studies reveal the presence of secondary phase for higher Mn-doping concentrations (x≥0.03). Secondary phase formation having spinel structure is confirmed and reported as an evidence for the first time using transmission electron microscopy study. Chemical investigations using X-ray photoelectron spectroscopy showed the presence of Mn in two valence states. From the observed results we are of the opinion that Zn2+ ions, mainly present at or near grain boundaries, diffuse into manganese oxide to form a stable spinel phase ZnxMn3−xO4 at or near the grain boundaries of ZnO/Zn1−xMnxO. Magnetization measurements did not show any magnetic transition down to 5 K.
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 5, March 2010, Pages 536–541