کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1640991 | 1517207 | 2016 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Achieving room temperature ferromagnetism in ZnS nanoparticles via Eu3+ doping
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
This paper reports the structural as well as the magnetic properties of ZnS:Eu3+ (0, 1, 2, 3, and 4Â at%) nanoparticles prepared by a hydrothermal method. The compositional, structural and magnetic properties of ZnS:Eu3+ nanoparticles were investigated by energy dispersive X-ray spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM) measurements. XRD studies confirmed that all the samples had a cubic structure with good crystallinity. TEM showed that the particles were polycrystalline with a mean size of 5-8Â nm. XPS revealed the oxidation state of the Eu in the ZnS lattice to be +3. All the Eu3+ -doped ZnS nanoparticles exhibited room temperature ferromagnetic behavior as a function of doping concentration. The observed RTFM may be interpreted by the contribution of the magnetic moments from the unpaired 4f electrons of Eu3+ in the ZnS:Eu3+ nanoparticles. The interesting magnetic properties of ZnS:Eu3+ nanoparticles may be further explored for new generation spintronic devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 181, 15 October 2016, Pages 227-230
Journal: Materials Letters - Volume 181, 15 October 2016, Pages 227-230
نویسندگان
B. Poornaprakash, P.T. Poojitha, U. Chalapathi, Si-Hyun Park,