کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7994110 | 1516155 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of oxygen pressure on structural and magnetic properties of Nd2NiMnO6 thin films grown on different substrates
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Double perovskites have been studied extensively in the bulk form however very few reports are available on their thin films. Here we are presenting results on first time grew thin films of double perovskite Nd2NiMnO6 (NNMO). We report the comparative structural and magnetic studies of the PLD grown thin films on different substrates i.e. SrTiO3 (STO) and MgO. X-ray diffraction (XRD) profiles show that the film grown on STO is epitaxial whereas it is polycrystalline on MgO substrate. Films on both the substrates were grown at 800 mTorr and 200 mTorr oxygen partial pressure. We observe that the film shows the magnetic behavior similar to the bulk sample. We observe the high-temperature ferromagnetic transition near 192Â K along with an additional transition observed in the low temperature region (vicinity of 100Â K) in Field cooled (FC) magnetization. Super-exchange interaction between Ni2+-O-Mn4+ is attributed to the ferromagnetic ordering in these samples. Mixed valence states Ni3+ and Mn3+ present in the films leads to antiferromagnetic (AFM) interactions which attributes to the appearance of low temperature magnetic transition. The oxygen pressure applied while growing the thin films was found to affect the magnetic moment of NNMO films significantly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 739, 30 March 2018, Pages 586-589
Journal: Journal of Alloys and Compounds - Volume 739, 30 March 2018, Pages 586-589
نویسندگان
Geetanjali Singh, Pooja Singh, R.J. Choudhary, Anjana Dogra,