Microstructural analysis, optical and magnetic properties of nanocrystalline Ni doped Dy2O3

被引：26
作者：
Bhakta, N. [1 ]
Das, A. [2 ]
Das, D. [2 ]
Yoshimura, K. [3 ]
Bajorek, A. [4 ,5 ]
Chakrabarti, P. K. [1 ]
机构：
[1] Burdwan Univ, Dept Phys, Solid State Res Lab, Burdwan 713104, WB, India
[2] UGC DAE Consortium Sci Res, 3-LB-8, Kolkata 700098, India
[3] Kyoto Univ, Dept Chem, Kyoto 6068502, Japan
[4] Univ Silesia Katowice, A Chelkowski Inst Phys, 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland
[5] Univ Silesia Katowice, Silesian Ctr Educ & Interdisciplinary Res, 75 Pulku Piechoty 1A, PL-41500 Chorzow, Poland
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2019年 / 227卷
关键词：
XRD; Nanoparticles; XPS; Raman; FTIR; Magnetic; ROOM-TEMPERATURE FERROMAGNETISM; RAMAN-SPECTROSCOPY; PHASE-TRANSITION; OXIDE; NANOPARTICLES; SEMICONDUCTOR; XRD; TB;
D O I：
10.1016/j.matchemphys.2019.02.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocrystalline samples of undoped dysprosium oxide (Dy2O3) and Ni2+ doped Dy2O3 (Dy1.90Ni0.10O3.delta/DNO) are prepared by co-precipitation method. X-ray diffraction (XRD) analysis by Maud software confirmed the desired crystallographic phase of both samples and also the substitution of Ni2+ ion in Dy2O3 lattice. Absence of impurity is confirmed from Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR) and high resolution transmission electron microscope (HRTEM) analysis. Magnetization vs. field (M-H) loop of DNO recorded at 5 and 10 K shows clear hysteresis loop with magnetization similar to 138.71 emu/g at 5 K and similar to 121.52 emu/g at 10 K with applied magnetic field of 5 T. The deviation of inverse susceptibility vs. temperature curve from Curie-Weiss fitting below similar to 30 K and also the deviation of initial magnetization data of M-H loop recorded at 30 K from linear fitting suggests that the DNO is in mixed paramagnetic and ferromagnetic phase at and below similar to 30 K. Defect mediated ferromagnetic ordering found in DNO at low temperature, is analyzed by bound magnetic polaron model.
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页码：332 / 339
页数：8
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