Room-Temperature Magneto-Optics of Ferromagnetic Transition-Metal-Doped ZnO Thin Films

Abstract In the present work, we have studied the ferromagnetic nature of the (Fe, Ni) co-doped Zn1-x-y NiyFexO (y = 0.01 and x = 0.01, 0.03, 0.05) thin films fabricated through the RF magnetron sputtering on Silicon (400) substrate. Structural information of the deposited transition metal-doped ZnO thin films was studied through X-ray Diffraction (XRD) techniques. The surface roughness and average grain size of the thin films examine through Atomic Force Microscopy (AFM). The optical band gaps of the thin films have been analyzed through the UV-Vis spectroscopy and it was appropriate for the optoelectronic devices. Tau’c Plots were used for the calculation of the band gap by extrapolating the (αhν) = 0, the straight-line portion of the plot to zero absorption coefficient. The magnetic study of these thin films confirmed the ferromagnetic (FM) behavior. RT-FM in all the deposited thin films was discuses on the base of polaron percolation theory.

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A comparative study of different rare-earth (Gd, Nd, and Sm) metals doped ZnO thin films and its room temperature ammonia gas sensor activity: Synthesis, characterization, and investigation on the impact of dopant

Optical Materials ◽

10.1016/j.optmat.2021.111554 ◽

2021 ◽

Vol 121 ◽

pp. 111554

Author(s):

K. Kasirajan ◽

L. Bruno Chandrasekar ◽

S. Maheswari ◽

M. Karunakaran ◽

P. Shunmuga Sundaram

Keyword(s):

Thin Films ◽

Rare Earth ◽

Comparative Study ◽

Gas Sensor ◽

Room Temperature ◽

Zno Thin Films ◽

Ammonia Gas ◽

Doped Zno ◽

The Impact

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Room-temperature RF magnetron sputtering deposition of hydrogenated Ga-doped ZnO thin films on PET substrates for PDLC devices

Applied Physics A ◽

10.1007/s00339-018-2276-z ◽

2018 ◽

Vol 124 (12) ◽

Cited By ~ 2

Author(s):

Chaoting Zhu ◽

Tianqi Zhou ◽

Feng Shi ◽

Weijie Song ◽

Jia Li ◽

...

Keyword(s):

Thin Films ◽

Magnetron Sputtering ◽

Room Temperature ◽

Rf Magnetron Sputtering ◽

Zno Thin Films ◽

Sputtering Deposition ◽

Doped Zno

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Intrinsic defects responsible for the anomalous Raman peaks and the room-temperature ferromagnetism in nitrogen-doped ZnO thin films

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2012.11.044 ◽

2013 ◽

Vol 231 ◽

pp. 307-310 ◽

Cited By ~ 5

Author(s):

Ching-Chung Wang ◽

Chao-Ming Fu ◽

Yu-Min Hu

Keyword(s):

Thin Films ◽

Room Temperature ◽

Room Temperature Ferromagnetism ◽

Zno Thin Films ◽

Intrinsic Defects ◽

Nitrogen Doped ◽

Doped Zno

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Transition Metal-Doped ZnO: A Comparison of Optical, Magnetic, and Structural Behavior of Bulk and Thin Films

MRS Proceedings ◽

10.1557/proc-0957-k04-10 ◽

2006 ◽

Vol 957 ◽

Cited By ~ 1

Author(s):

William E. Fenwick ◽

Matthew H. Kane ◽

Zaili Fang ◽

Tahir Zaidi ◽

Nola Li ◽

...

Keyword(s):

Thin Films ◽

Transition Metal ◽

Optical Transmission ◽

Magnetic Hysteresis ◽

Structural Quality ◽

Bulk Crystals ◽

Transmission Measurements ◽

Doped Zno ◽

Metal Doped ◽

Metal Incorporation

ABSTRACTTransition metal-doped ZnO bulk crystals and thin films have been investigated to determine the effects of transition metal incorporation on optical, magnetic, and structural properties of ZnO. A modified melt growth technique was used to grow bulk Zn1-xMnxO, Zn1-xCoxO, and Zn1-xFexO. Optical transmission measurements show an apparent shift in absorption edge with increasing transition metal incorporation. Raman spectroscopy also shows increasing lattice disorder with increasing transition metal concentration. ZnO thin films doped with Ni, Co, and Gd were grown by metalorganic chemical vapor deposition (MOCVD). While the Co-doped thin films showed antiferromagnetic behavior, magnetic hysteresis was observed in the Ni-doped and Gd-doped thin films. Structural quality was verified with X-ray diffraction (XRD), and optical properties were investigated using room temperature photoluminescence (PL) and optical transmission measurements. Properties of ZnO:TM bulk crystals and thin films are compared and used to discuss possible origins of ferromagnetism in these materials.

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