Characterization of bulk crystals of transition metal doped ZnO for spintronic applications

ABSTRACTIn this work, we report on the material properties of ZnO doped with Mn, Co, and Fe grown by a modified melt growth technique. X-ray diffraction measurements show that transition metals can be incorporated on Zn sites; an increase in the lattice parameter is apparent with increasing doping level. UV-visible transmission and reflectance measurements have also been performed. Absorption bands in the visible regime are distinctive to the individual transition metal dopants. A noticeable shift in the optical band edge has been observed from these Mn/Co/Fe-doped ZnO crystals in comparison with the undoped material. ZnO may also provide a suitable platform for the incorporation of transition metal elements through high temperature near equilibrium growth processes; however, further work is required in order to employ these materials for spintronic applications.

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Rietveld refinement of transition metal doped ZnO

Powder Diffraction ◽

10.1154/1.2903739 ◽

2008 ◽

Vol 23 (S1) ◽

pp. S36-S41 ◽

Cited By ~ 14

Author(s):

D. A. A. Santos ◽

A. D. P. Rocha ◽

M. A. Macêdo

Keyword(s):

Transition Metal ◽

Rietveld Refinement ◽

Sol Gel ◽

Hexagonal Wurtzite Structure ◽

X Ray Diffraction ◽

Ionic Radii ◽

X Ray ◽

Sol Gel Process ◽

Doped Zno ◽

Metal Doped

Nanocrystals of Zn1−xMxO (M=Mn, Co, or Ni) were grown using proteic sol-gel process, and the crystalline phases were identified by X-ray diffraction and Rietveld refinement. The nanocrystals have hexagonal wurtzite structure, with space group P63mc. The insertion of Mn2+ in the place of Zn2+ provoked an increase in the size of the nanocrystals, and the insertion of Co2+ or Ni2+ caused a reduction in the sizes of the nanocrystals, as compared to pure ZnO. This occurred because these three transition metals have very different ionic radii (Co2+=0.58 A˚, Mn2+=0.66 A˚, Ni2+=0.55 A˚, and Zn2+=0.60 A˚).

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Structural, Optical and Magnetic Characterization of Monodisperse Transition Metal-Doped ZnO Nanocrystals for Potential Spintronics Applications

INTERMAG 2006 - IEEE International Magnetics Conference ◽

10.1109/intmag.2006.376091 ◽

2006 ◽

Author(s):

O. Perales-Perez ◽

M. S. Tomar ◽

A. Parra ◽

A. Ruiz-Mendoza ◽

C. Rinaldi ◽

...

Keyword(s):

Transition Metal ◽

Magnetic Characterization ◽

Zno Nanocrystals ◽

Doped Zno ◽

Metal Doped

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Inorganic Cluster Synthesis and Characterization of Transition-Metal-Doped ZnO Hollow Spheres

Crystal Growth & Design ◽

10.1021/cg800260h ◽

2008 ◽

Vol 8 (8) ◽

pp. 2609-2613 ◽

Cited By ~ 37

Author(s):

Xiao Li Zhang ◽

Ru Qiao ◽

Ju Chang Kim ◽

Young Soo Kang

Keyword(s):

Transition Metal ◽

Hollow Spheres ◽

Synthesis And Characterization ◽

Doped Zno ◽

Metal Doped ◽

Zno Hollow Spheres

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Characterization of dilute magnetic semiconducting transition metal doped ZnO thin films by sol–gel spin coating method

Applied Surface Science ◽

10.1016/j.apsusc.2014.06.093 ◽

2014 ◽

Vol 313 ◽

pp. 870-876 ◽

Cited By ~ 66

Author(s):

G. Vijayaprasath ◽

R. Murugan ◽

G. Ravi ◽

T. Mahalingam ◽

Y. Hayakawa

Keyword(s):

Thin Films ◽

Transition Metal ◽

Spin Coating ◽

Sol Gel ◽

Zno Thin Films ◽

Spin Coating Method ◽

Coating Method ◽

Doped Zno ◽

Metal Doped

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Correlative experimental and theoretical characterization of transition metal doped hydroxyapatite nanoparticles fabricated by hydrothermal method

Materials Characterization ◽

10.1016/j.matchar.2021.110911 ◽

2021 ◽

Vol 173 ◽

pp. 110911

Author(s):

Anastasia V. Sadetskaya ◽

Natalia P. Bobrysheva ◽

Mikhail G. Osmolowsky ◽

Olga M. Osmolovskaya ◽

Mikhail A. Voznesenskiy

Keyword(s):

Transition Metal ◽

Hydrothermal Method ◽

Hydroxyapatite Nanoparticles ◽

Theoretical Characterization ◽

Metal Doped

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Characterization of Beeswax, Candelilla Wax and Paraffin Wax for Coating Cheeses

Coatings ◽

10.3390/coatings11030261 ◽

2021 ◽

Vol 11 (3) ◽

pp. 261

Author(s):

Adolfo Bucio ◽

Rosario Moreno-Tovar ◽

Lauro Bucio ◽

Jessica Espinosa-Dávila ◽

Francisco Anguebes-Franceschi

Keyword(s):

Physical And Mechanical Properties ◽

Tensile Tests ◽

Paraffin Wax ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Absorption Bands ◽

Dimensional Changes ◽

Ductile Behavior ◽

Candelilla Wax

A study on the physical and mechanical properties of beeswax (BW), candelilla wax (CW), paraffin wax (PW) and blends was carried out with the aim to evaluate their usefulness as coatings for cheeses. Waxes were analyzed by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), differential scanning calorimetry (DSC), permeability, viscosity, flexural and tensile tests and scanning electron microscopy. Cheeses were coated with the waxes and stored for 5 weeks at 30 °C. Measured parameters were weight, moisture, occurrence and degree of fractures, and dimensional changes. The crystal phases identified by XRD for the three waxes allowed them to determine the length of alkanes and the nonlinear compounds in crystallizable forms in waxes. FTIR spectra showed absorption bands between 1800 and 800 cm−1 related to carbonyls in BW and CW. In DSC, the onset of melting temperature was 45.5 °C for BW, and >54 °C for CW and PW. Cheeses coated with BW did not show cracks after storage. Cheeses coated with CW and PW showed microcraks, and lost weight, moisture and shrunk. In the flexural and tensile tests, BW was ductile; CW and PW were brittle. BW blends with CW or PW displays a semi ductile behavior. Cheeses coated with BW blends lost less than 5% weight during storage. The best waxes were BW and the blends.

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MOVPE Growth of Quaternary (Al,Ga,In)N for UV Optoelectronics

MRS Internet Journal of Nitride Semiconductor Research ◽

10.1557/s1092578300004580 ◽

2000 ◽

Vol 5 (S1) ◽

pp. 412-424

Author(s):

Jung Han ◽

Jeffrey J. Figiel ◽

Gary A. Petersen ◽

Samuel M. Myers ◽

Mary H. Crawford ◽

...

Keyword(s):

Room Temperature ◽

Rutherford Backscattering Spectrometry ◽

Optoelectronic Devices ◽

Lattice Parameter ◽

X Ray Diffraction ◽

X Ray ◽

Peak Energy ◽

Movpe Growth ◽

Pl Emission

We report the growth and characterization of quaternary AlGaInN. A combination of photoluminescence (PL), high-resolution x-ray diffraction (XRD), and Rutherford backscattering spectrometry (RBS) characterizations enables us to explore the contours of constant- PL peak energy and lattice parameter as functions of the quaternary compositions. The observation of room temperature PL emission at 351nm (with 20% Al and 5% In) renders initial evidence that the quaternary could be used to provide confinement for GaInN (and possibly GaN). AlGaInN/GaInN MQW heterostructures have been grown; both XRD and PL measurements suggest the possibility of incorporating this quaternary into optoelectronic devices.

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