کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517980 | 1511598 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystal chemistry and physical properties of the ternary compounds RE5B4C5 (RE=Ce, Pr, Nd)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Crystal chemistry and physical properties of the ternary compounds RE5B4C5 (RE=Ce, Pr, Nd) Crystal chemistry and physical properties of the ternary compounds RE5B4C5 (RE=Ce, Pr, Nd)](/preview/png/1517980.png)
چکیده انگلیسی
The ternary rare-earth metal boride carbides RE5B4C5 (RE=Ce, Pr, Nd) were prepared by arc melting the mixtures of the pure elements and subsequent annealing at 1270Â K. Their crystal structures were determined from single crystal X-ray diffraction data. They crystallize in the Ce5B4C5 type of structure (space group Pna21, Z=8). Two new compounds were found, Pr5B4C5: a=24.592(2)Â Ã
, b=8.4563(5)Â Ã
, c=8.4918(5)Â Ã
, R1=0.043 (wR2=0.076) for 2871 reflections with Io⩾2Ï(Io)); for Nd5B4C5: a=24.301(1) Ã
, b=8.3126(5)Â Ã
, c=8.3545(4)Â Ã
, R1=0.035 (wR2=0.069) for 3707 reflections with Io⩾2Ï(Io)). Its structural arrangement consists of a three-dimensional framework of rare-earth atoms resulting from the stacking of slightly corrugated two-dimensional square nets, leading to voids filled with B4C4, B3C3, BC2 finite chains and isolated carbon atoms. Ce5B4C5 is an antiferromagnet at 5 K followed by a metamagnetic transition in elevated external fields. Pr5B4C5 and Nd5B4C5 are ferromagnets below TC=12 and 15 K, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 70, Issues 3â4, MarchâApril 2009, Pages 561-566
Journal: Journal of Physics and Chemistry of Solids - Volume 70, Issues 3â4, MarchâApril 2009, Pages 561-566
نویسندگان
Volodymyr Babizhetskyy, Kurt Hiebl, Hansjürgen Mattausch, Arndt Simon,