کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9781874 | 1511638 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic susceptibility of vanadium garnets NaPb2Co2V3O12 and NaPb2Ni2V3O12
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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: Magnetic susceptibility of vanadium garnets NaPb2Co2V3O12 and NaPb2Ni2V3O12 Magnetic susceptibility of vanadium garnets NaPb2Co2V3O12 and NaPb2Ni2V3O12](/preview/png/9781874.png)
چکیده انگلیسی
Vanadium garnets NaPb2Co2V3O12 and NaPb2Ni2V3O12 have been successfully synthesized. The X-ray diffraction experiments indicate that these compounds have the garnet structure of cubic symmetry of space group Ia3¯d(Oh10) with the lattice constant of 12.742 Ã
(NaPb2Co2V3O12) and 12.666Â Ã
(NaPb2Ni2V3O12), respectively. The magnetic susceptibility of NaPb2Ni2V3O12 shows the Curie-Weiss paramagnetic behavior between 4.2 and 350 K. The effective magnetic moment μeff of NaPb2Ni2V3O12 is 3.14 μB due to Ni2+ ion at A-site and the Weiss constant is â3.67 K (antiferromagnetic sign). For NaPb2Co2V3O12, the simple Curie-Weiss law cannot be applicable. The ground state is the spin doublet E2(t26e) and the first excited state is spin quartet T14(t25e2), according to Tanabe-Sugano energy diagram on the basis of octahedral crystalline symmetry. This excited spin quartet state just a bit higher than ground state influences strongly the complex temperature dependence of magnetic susceptibility for NaPb2Co2V3O12.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 1, January 2005, Pages 177-183
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 1, January 2005, Pages 177-183
نویسندگان
Shoichi Nagata, Takumi Yamagishi, Kenji Awaka, Junji Awaka, Shuji Ebisu, Susumu Chikazawa,