Enhanced Ferromagnetic Property at Room Temperature and Photocatalytic Efficiency of CdO/CeO2/PVP Nanocomposite

2020 ◽  
Vol 33 (8) ◽  
pp. 2469-2481
Author(s):  
S. Senthil ◽  
S. Srinivasan ◽  
T. Thangeeswari ◽  
M. Silambarasan ◽  
V. Ratchagar
Keyword(s):  
Room Temperature ◽  
Photocatalytic Efficiency ◽  
Ferromagnetic Property

Structural and Ferromagnetic Properties of Ho-Doped BiFeO3 Films

2017 ◽  
Vol 727 ◽  
pp. 996-1000 ◽  
Author(s):  
Ning An ◽  
Hai Tao Zhang ◽  
Cheng Zhi Liu ◽  
Cun Bo Fan ◽  
Xue Dong ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Raman Spectroscopy ◽  
Room Temperature ◽  
Oxygen Vacancies ◽  
Sol Gel ◽  
Wave Number ◽  
Ferromagnetic Property ◽  
Peak Intensity ◽  
Structure Morphology ◽  
Xrd Patterns

In order to improve the structural and ferromagnetic property of BiFeO3, the effects of Ho3+ doping is systematically investigated. Pure BiFeO3 and Ho-doped BiFeO3 thin films are fabricated by sol-gel method, and the phase structure, morphology, crystalline structure, ferromagnetic are characterized by XRD, SEM, Raman spectra and VSM, respectively. The XRD patterns of the samples indicate that all the compounds crystallize in rhombohedral distorted perovskite structure with space group R3c and the Ho substitution can suppress the intrinsic formation of the miscellaneous phase. The SEM proves that along with the increasing of Ho concentration, the surface roughness of BiFeO3 is decreased due to the reduction of defects in the preparation. From the Raman spectroscopy, it is found that the peak intensity of 8 modes in Bi1-xHoxFeO3 are increased and the modes shift to higher wave number. Besides, the VSM results show that the ferromagnetic of the samples is enhanced with increasing of Ho concentration. When x=0.1, Ms is improved to be 4.8emu/g. The results can prove that the Ho3+ doping can reduce the volatilization of Bi3+, decrease the concentration of oxygen vacancies and improve the room-temperature ferromagnetic of BiFeO3.

SYNTHESIS AND ROOM TEMPERATURE FERROMAGNETIC PROPERTY OF COBALT DOPED ZINC OXIDE

2009 ◽  
Vol 23 (14) ◽  
pp. 1799-1804 ◽  
Author(s):  
FENGYU WEN
Keyword(s):  
Room Temperature ◽  
Combustion Process ◽  
Combustion Method ◽  
Magnetization Measurement ◽  
Ferromagnetic Behavior ◽  
Vibrating Sample Magnetometer ◽  
Ferromagnetic Property ◽  
X Ray ◽  
Microwave Assisted ◽  
Co Doped

Nanocrystalline Co -doped ZnO ( Zn 1-x Co x O , x = 0.00, 0.05) powders have been successfully prepared by a microwave-assisted combustion method using Zn ( NO 3)2·6 H 2 O and Co ( NO 3)2·6 H 2 O as starting materials and urea as fuel. The as-prepared products were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM). It was found that the combustion process took only a few minutes to obtain Zn 1-x Co x O powders. The field dependence of magnetization measurement at room temperature for the as-prepared Zn 0.95 Co 0.05 O powders exhibited the obvious ferromagnetic behavior.

Structure, Electrical, Optical and Magnetic Properties of Mn-Doped Copper Nitride Thin Films Deposited by Radio Frequency Magnetron Sputtering

2014 ◽  
Vol 893 ◽  
pp. 519-523
Author(s):  
Jian Bo Yang ◽  
Xiao Feng Li ◽  
Xing Ao Li ◽  
Jian Ping Yang ◽  
Tao Yang ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Radio Frequency ◽  
Room Temperature ◽  
Manganese Concentration ◽  
Radio Frequency Magnetron Sputtering ◽  
Ferromagnetic Property ◽  
Copper Nitride ◽  
Growth Orientation ◽  
Optical And Magnetic Properties ◽  
Mn Doped

Mn-doped Cu3N films were prepared by radio frequency reactive magnetron sputtering method under different manganese concentration. The deposits exhibit a satisfactory crystallinity and a preferred growth orientation along the (111) plane. The shapes of crystalline grains vary from pyramid-like to rugby-ball-like with the Mn-doping constituent in Cu3N film reaching 0.02%. The electrical resistivity of Mn-doped Cu3N films has dramatically increased from 0.102×103 Ω·cm to 0.495×103 Ω·cm at room temperature. Moreover, the reflectivity difference and ferromagnetic property have also been investigated.

Ferromagnetic Property of Co and Fe-Implanted ZnO Thin Film at Room Temperature

2006 ◽  
Vol 52 ◽  
pp. 42-47 ◽  
Author(s):  
W.K. Choi ◽  
B. Angadi ◽  
H.C. Park ◽  
J.H. Lee ◽  
Jong Han Song ◽  
...  
Keyword(s):  
Thin Film ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Ion Irradiation ◽  
Zno Thin Films ◽  
High Resistivity ◽  
Zno Thin Film ◽  
Ferromagnetic Property ◽  
Before And After ◽  
Xrd Patterns

The results Co and Fe implanted ZnO thin films were studied before and after 200 MeV Ag ion irradiation. The as-implanted films shows the presence of nano sized Co and Fe clusters as seen through XRD patterns and exhibited high resistivity compared to un-implanted films. After Ag ion irradiation the Co and Fe clusters get dissolved in ZnO lattice and the films resistivity reduced to half of the as implanted values. The magnetic properties of Ag irradiated films were confirmed through magnetization hysteresis and Co implanted films exhibit higher magnetization compared to Fe implanted films.

scholarly journals Enhanced Photoluminescence and Photocatalytic Efficiency of La-Doped Bismuth Molybdate: Its Preparation and Characterization

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 35
Author(s):  
Muhammad Waqar ◽  
Muhammad Imran ◽  
Syed Farooq Adil ◽  
Sadia Noreen ◽  
Shoomaila Latif ◽  
...  
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Sodium Dodecyl ◽  
Catalytic Performance ◽  
Spectroscopic Techniques ◽  
Photocatalytic Efficiency ◽  
Bismuth Molybdate ◽  
Enhanced Photoluminescence ◽  
Ft Ir ◽  
La Doped

Herein, a systematic study of the enhanced physicochemical properties of lanthanide doped (La-doped) bismuth molybdate (Bi2MoO6) is performed. For this purpose, Bi2MoO6 and La-doped Bi2MoO6 were prepared by the sol-gel method. BiCl3, Na2MoO4·2H2O, and LaCl3·7H2O were taken as the main precursors while sodium dodecyl sulfate was used as a surfactant. Both Bi2MoO6 and La-doped Bi2MoO6 were calcined at 650 °C for 2 h. These prepared materials were characterized by spectroscopic techniques such as UV–VIS, FT-IR, XRD, photoluminescence, XPS, along with other techniques such as SEM, TEM, TGA, etc. The investigation of luminescence behavior revealed that the La-doped Bi2MoO6 nanocomposite exhibited much greater luminescence compared to the undoped Bi2MoO6. The photocatalytic behavior of the prepared materials was explored by studying the degradation of methylene blue (MB) at room temperature. The degradation of MB with Bi2MoO6 and La-doped bismuth molybdate were observed to be 68% and 75% @ 45 s, respectively, indicating an enhancement of catalytic performance due to the La doping.

ROOM TEMPERATURE FERROMAGNETISM IN (N, Co)-CODOPED ZnO THIN FILMS

2007 ◽  
Vol 21 (13) ◽  
pp. 799-806 ◽  
Author(s):  
D. L. HOU ◽  
X. J. YE ◽  
H. J. MENG ◽  
X. Y. ZHAO ◽  
H. J. ZHOU ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Inverse Correlation ◽  
Zno Thin Films ◽  
Clear Correlation ◽  
Ferromagnetic Property ◽  
Glass Substrates ◽  
P Type ◽  
Co Doped

A series of nitrogen-doped Zn 0.93 Co 0.07 O thin films grown on glass substrates were prepared by magnetron sputtering, which have shown ferromagnetic property at room temperature. The largest moment of about 4.92 μB/ Co and Curie temperature (T c ) of about 300 K were observed for Zn 0.93 Co 0.07 O thin film. P-type Co -doped ZnO thin films with room temperature ferromagnetism were obtained. We demonstrated a clear correlation between nitrogen and transition temperature and an inverse correlation between nitrogen and magnetization per Co ion.

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