Precise lattice parameter measurements in CsCl-Br solid solutions between room temperature and 90°K by powder x-ray diffraction

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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Mechanically Driven Dissolution of Sn in Near-Equiatomic Bcc FeCo

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.194.187 ◽

2012 ◽

Vol 194 ◽

pp. 187-193 ◽

Cited By ~ 3

Author(s):

J.M. Loureiro ◽

Benilde F.O. Costa ◽

Gerard Le Caër ◽

Bernard Malaman

Keyword(s):

Magnetic Field ◽

Solid Solutions ◽

Room Temperature ◽

Hyperfine Magnetic Field ◽

Ternary Alloys ◽

119Sn Mössbauer Spectroscopy ◽

X Ray Diffraction ◽

Mechanically Alloyed ◽

Powder Mixtures ◽

X Ray

Ternary alloys, (Fe50−x/2Co50−x/2)Snx(x ≤ 33 at.%), are prepared by mechanical alloying from powder mixtures of the three elements. As-milled alloys are studied by X-ray diffraction and 57Fe and 119Sn Mössbauer spectroscopy. The solubility of Sn in near-equiatomic bcc FeCo is increased from ~0.5 at. % at equilibrium to ~20 at.% in the used milling conditions. The average 119Sn hyperfine magnetic field at room temperature is larger, for any x, than the corresponding fields in mechanically alloyed Fe-Sn solid solutions.

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

MRS Proceedings ◽

10.1557/proc-595-f99w6.2 ◽

1999 ◽

Vol 595 ◽

Cited By ~ 1

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

AbstractWe 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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X-ray Diffraction Studies of Solid Solutions of Pentaglycerine-Neopentylglycol

Advances in X-ray Analysis ◽

10.1154/s0376030800020978 ◽

1988 ◽

Vol 32 ◽

pp. 609-616 ◽

Cited By ~ 2

Author(s):

D. Chandra ◽

C. S. Barrett ◽

D. K. Benson

Keyword(s):

Crystal Structure ◽

Energy Storage ◽

Hydrogen Bonds ◽

Solid Solutions ◽

Room Temperature ◽

Energy Storage Materials ◽

Anisotropic Structure ◽

X Ray Diffraction ◽

X Ray ◽

Cubic Structure

AbstractAn array of molecules that is anisotropic in the extreme has been discovered in certain thermal-energy storage materials and is reported here: neopentylglycol (NPG) and NPG-rich solid solutions with pentaglycerine (PG) have a crystal structure, stable at room temperature, that consists of bimolecular chains of molecules that are all unidirectionally aligned throughout a crystal. There are hydrogen bonds between every molecule in one chain and its neighbors in that chain, but none between molecules of one chain and any molecules of the neighboring parallel chains. Thus there are strong intermolecular bonds along each chain and only weaker bonds between the chains. The structure has been determined by using modern single crystal techniques with 529 independent reflections from a crystal of NPG (C5H12O2). The structure is monoclinic with space group P21/c - C2h5. This anisotropic structure transforms to a cubic structure at higher temperatures.

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Dielectric, ferroelectric, and ferromagnetic properties of 0.7Bi1−xLax(Fe0.9Cr0.1)O3–0.1BaTiO3–0.2PbTiO3 solid solutions

Journal of Materials Research ◽

10.1557/jmr.2010.0231 ◽

2010 ◽

Vol 25 (9) ◽

pp. 1812-1816 ◽

Cited By ~ 1

Author(s):

Xiao-hui Liu ◽

Zhuo Xu ◽

Xiao-yong Wei ◽

Xi Yao

Keyword(s):

Solid Solutions ◽

Room Temperature ◽

Hysteresis Loops ◽

Weak Ferromagnetism ◽

Lattice Parameter ◽

X Ray Diffraction ◽

Crystal Lattices ◽

Temperature Polarization ◽

Polarization Electric Field ◽

Ferroelectric Hysteresis

Solid solutions 0.7Bi1−xLax (Fe0.9Cr0.1) O3–0.1BaTiO3–0.2PbTiO3 (BLxFOC-BT-PT, with x = 0, 0.03, 0.05, 0.07) solid solutions were prepared by the traditional ceramic process. X-ray diffraction results reveal that all samples show pure pseudocubic perovskites structure. The lattice parameter of the solid solutions increases linearly with the La content, indicating that La ions have entered crystal lattices to form a solid solution. The Curie temperature of the solid solutions decreases with the La content. Room-temperature polarization–electric field (P–E) curves indicate that the samples with x = 0.03 and 0.05 exhibit saturated P–E loops. Piezoelectric constant d33 of the solid solutions increases firstly and then decreases. Magnetizations of the solid solutions decrease with the La content. The evidence of weak ferromagnetism and saturated ferroelectric hysteresis loops in BLxFOC–BT–PT system at room temperature makes it a good candidate for multiferroic applications.

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Single-Crystal AU-NI Solid Solutions Grown by MBE

MRS Proceedings ◽

10.1557/proc-280-457 ◽

1992 ◽

Vol 280 ◽

Cited By ~ 2

Author(s):

A. Marty ◽

B. Gilles ◽

G. Patrat ◽

J. C. Joud ◽

A. Chamberod

Keyword(s):

Single Crystal ◽

Solid Solutions ◽

Room Temperature ◽

Large Strain ◽

Grazing Incidence ◽

Lattice Parameters ◽

X Ray Diffraction ◽

X Ray

ABSTRACTEpitaxial solid solutions Au1-x Nix (100) have been obtained at room temperature on Au(100) substrates by the MBE technique. The layers are 10 nm-thick and the composition x has been varied up to 0.37. A large strain (2–3%) has been measured by X-ray diffraction. The lattice parameters have been measured in two perpendicular directions, perpendicular and parallel to the surface. In the latest case, the grazing-incidence technique has been used. Because this technique is very sensitive to the surface, the strain results may be re-interpreted if, the upperlOO nm are enriched in Au.

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Room Temperature Ferromagnetism in Powder Form of Sn1-xCrxO2 (x = 0.01, 0.02, 0.03, 0.04 and 0.05) Solid Solution

MRS Proceedings ◽

10.1557/proc-1201-h10-01 ◽

2009 ◽

Vol 1201 ◽

Author(s):

Kun Xu ◽

Mitsuru Izumi ◽

Osami Yanagisawa ◽

Tetsuya Ida

Keyword(s):

Room Temperature ◽

Room Temperature Ferromagnetism ◽

Lattice Parameter ◽

Nominal Composition ◽

Powder Form ◽

X Ray Diffraction ◽

Interstitial Position ◽

X Ray ◽

Cr Content ◽

Structural And Magnetic Properties

AbstractStructural and magnetic properties were investigated in the mixed powders of Sn1-xCrxO2 (x = 0.01, 0.02, 0.03, 0.04 and 0.05) in nominal composition. The lattice parameter observed in (110) x-ray diffraction indicates two step changes with increasing Cr content. The occupation of Cr ion at the interstitial position leads to elongation of the lattice parameter for x = 0.01 to x =0.03. Then, the Cr3+ ions are remarkably substituted into the Sn4+ ion site for x = 0.04 to x = 0.05, which results in shortening of the lattice. The lattice parameters for x = 0.01 and 0.02 are larger than x = 0.03 to 0.05. The room temperature ferromagnetism appeared in the sample with x = 0.01 and reaches maximum at the doping rate of x = 0.02; while the magnetization decreases for x > 0.02 was observed. Present study clearly shows the existence of correlation between appearance of ferromagnetism and the structural change.

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ENHANCED MAGNETIZATION IN COBALT SUBSTITUTED Ni–Zn NANOFERRITES

International Journal of Nanoscience ◽

10.1142/s0219581x1100909x ◽

2011 ◽

Vol 10 (04n05) ◽

pp. 571-576 ◽

Cited By ~ 3

Author(s):

M. CHAITANYA VARMA ◽

A. MAHESH KUMAR ◽

K. H. RAO

Keyword(s):

Particle Size ◽

Room Temperature ◽

Sol Gel ◽

Chelating Agent ◽

Lattice Parameter ◽

Line Broadening ◽

X Ray Diffraction ◽

Chemical Methods ◽

X Ray ◽

Nickel Zinc

Cobalt substituted nickel zinc ferrite nanoparticles ( Ni 0.65–x Co x Zn 0.35 Fe 2.0 O 4) X varying from 0.0 to 0.65 in steps of 0.15 have been produced using sol–gel method, with PVA as chelating agent. The phase formation of the sintered ferrite was confirmed by X-ray diffraction studies. The lattice parameter a(A°) has been calculated using Nelson–Riley method. The crystallite size has been estimated by the Williamson–Hall method using the full width at half-maximum (FWHM) of the line broadening of all the peaks. Mössbauer spectroscopy (MS) of the samples showed the clear presence of two sextets and distribution of iron over the two sites has been given. Increase in saturation magnetization with cobalt concentration with a slight decrease for x = 0.15 has been observed with the vibrating sample magnetometry study. The observed value of magnetization for Ni0.65Zn0.35Fe2O4 with a particle size of 43.5 nm has been 71 emu/gm at room temperature, which is higher than that reported for samples prepared using chemical methods of the same composition. The results have been explained on the basis of the particle size and cation distribution among various sites.

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Controllable Thermal Expansion in In2-xFexMoxO12

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.677 ◽

2014 ◽

Vol 602-603 ◽

pp. 677-680

Author(s):

Mei Mei Wu ◽

Yun Tao Liu

Keyword(s):

Thermal Expansion ◽

Solid Solutions ◽

Room Temperature ◽

Linear Thermal Expansion Coefficient ◽

Linear Thermal Expansion ◽

Orthorhombic Phase ◽

Monoclinic Structure ◽

X Ray Diffraction ◽

X Ray ◽

Fe Content

The structural and thermal expansion properties of solid solutions In2-xFexMo3O12have been characterized using X-ray diffraction. The lattice parameters decrease linearly with increasing Fe content at room temperature. All compounds exhibit monoclinic structure at room temperature, and transform to orthorhombic phase upon heating. Monoclinic In2-xFexMo3O12(x= 0.3, 1.0 and 1.3) possess strong positive thermal expansion, while the linear thermal expansion coefficient of orthorhombic phase varies from zero/near-zero to positive with increasing Fe3+content.

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X-ray, IR and SEM studies on some Li-Cd ferrites

YMER Digital ◽

10.37896/ymer20.12/30 ◽

2021 ◽

Vol 20 (12) ◽

pp. 333-340

Author(s):

Sudhir Kulkarni ◽

Keyword(s):

Grain Size ◽

Room Temperature ◽

Single Phase ◽

Lattice Parameter ◽

Lithium Ferrite ◽

Cadmium Content ◽

X Ray Diffraction ◽

Ceramic Method ◽

X Ray ◽

Single Phase Formation

Lithium-Cadmium ferrites with general formula Li0.5-x/2 Fe2.5-x/2 Cdx O4 (with x = 0,0.1,0.2....,0.7) were prepared by standard ceramic method. X-ray diffraction studies confirms single phase formation and lattice parameters were calculated. The crystal structure is cubic and lattice parameter increases with increasing Cd content. The infrared absorption (IR) spectra of all the samples were recorded in the range 200-800 cm-1 at room temperature in the KBr medium. Lithium ferrite shows four principal bands and some shoulders have been observed. The force constants Kt and Ko were calculated using Waldron's analysis. Scanning electron microscopy studies shows increase in grain size up to x = 0.1 and then the grain size decreases with increase in cadmium content.

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