کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1491786 | 992360 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Optical, magnetic and electronic properties of Ln2O2Te (Ln = La, Sm and Gd) Optical, magnetic and electronic properties of Ln2O2Te (Ln = La, Sm and Gd)](/preview/png/1491786.png)
The synthesis, the optical and magnetic properties and the electronic structure of the rare-earth oxytellurides of formula Ln2O2Te (Ln = La, Sm and Gd) are reported. The magnetic measurements show that La2O2Te exhibit a diamagnetic behavior. The value of the magnetization M of Gd2TeO2 at our highest available field (50 kOe) is about 5.5μB, well below the expected value for two independent Gd ions (2gJ = 14μB) confirming the antiferromagnetic character of this compound. The magnetic properties of Sm2TeO2 reveal that Sm is in its 3+ oxidation state with a large Van Vleck contribution. The electronic structure calculations, studied by means of a first principles DFT approach, are consistent with the optical measurements and suggest an indirect band gap semiconductor behavior.
Journal: Materials Research Bulletin - Volume 43, Issue 2, 5 February 2008, Pages 312–319