Far-infrared dielectric function and phonon modes of spontaneously ordered (AlxGa1-x)0.52In0.48P

2002 ◽  
Vol 744 ◽  
Author(s):  
Tino Hofmann ◽  
Volker Gottschalch ◽  
Mathias Schubert
Keyword(s):  
Thin Film ◽  
Solid Solution ◽  
Spectroscopic Ellipsometry ◽  
Anharmonic Oscillator ◽  
Far Infrared ◽  
Dielectric Anisotropy ◽  
Phonon Modes ◽  
Quaternary Solid Solution ◽  
Phonon Properties ◽  
Ellipsometry Measurement

ABSTRACTWe present a far-infrared spectroscopic ellipsometry study of the phonon properties of partially CuPtB -ordered (AlxGa1-x)0.52In0.48P with x =0, 0.32, 0.7, and 1.0 and degrees of ordering η = 0 … 0.63, determined from generalized ellipsometry measurement of the near-band-gap order birefringence. An anharmonic oscillator approach is used to model the ordinary and extraordinary dielectric functions and determine the infrared-active longitudinal and transversal phonon modes of the thin film samples. Besides the isotropic GaP-, InP- and AlP-like phonon modes, we observe alloy-induced modes with low polarity for η ∼ 0. The evolution of lattice like and alloy-induced modes with increasing η is reviewed for Ga0.52In0.48P. With increasing η all phonon modes split in E- and A1 -type vibrations with polarization perpendicular and parallel to the sublattice ordering direction, respectively, and the mode frequencies shift continuously. Our observations extend recently published phonon frequencies from experiment and theory for CuPt-ordered Ga0.52In0.48P, which are compared and discussed. The phonon modes of highly ordered (AlxGa1-x)0.52In0.48P, η ∼ 0.6, are compared to the modes observed in the highly disordered quaternary solid solution. We propose the far-infrared dielectric anisotropy as a sensitive measure for sublattice ordering in multinary III-V alloys.

Electron microprobe study of turquoise-group solid solutions in the Neyshabour and Meydook mines, northeast and southern Iran

2020 ◽  
Vol 58 (1) ◽  
pp. 71-83
Author(s):  
Elahe Mansouri Gandomani ◽  
Nematollah Rashidnejad-Omran ◽  
Amir Emamjomeh ◽  
Pietro Vignola ◽  
Tahereh Hashemzadeh
Keyword(s):  
Solid Solution ◽  
Solid Solutions ◽  
Electron Microprobe ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Major Elements ◽  
Point Of View ◽  
Chemical Compositions ◽  
Light Blue ◽  
Quaternary Solid Solution

ABSTRACT Turquoise, CuAl6(PO4)4(OH)8·4H2O, belongs to the turquoise group, which consists of turquoise, chalcosiderite, aheylite, faustite, planerite, and UM1981-32-PO:FeH. In order to study turquoise-group solid solutions in samples from the Neyshabour and Meydook mines, 17 samples were selected and investigated using electron probe microanalysis. In addition, their major elements were compared in order to evaluate the feasibility of distinguishing the provenance of Persian turquoises. The electron microprobe data show that the studied samples are not constituted of pure turquoise (or any other pure endmember) and belong, from the chemical point of view, to turquoise-group solid solutions. In a turquoise–planerite–chalcosiderite–unknown mineral quaternary solid solution diagram, the chemical compositions of the analyzed samples lie along the turquoise–planerite line with minor involvement of chalcosiderite and the unknown mineral. Among light blue samples with varying hues and saturations from both studied areas, planerite is more abundant among samples from Meydook compared with samples from Neyshabour. Nevertheless, not all the light blue samples are planerite. This study demonstrates that distinguishing the deposit of origin for isochromatic blue and green turquoises, based on electron probe microanalysis method and constitutive major elements, is not possible.

Sputter Deposition of Fe-Co Nitride for Ferromagnetic Granular Nitride Thin Film

2009 ◽  
Vol 631-632 ◽  
pp. 327-331 ◽  
Author(s):  
K. Sakon ◽  
Y. Hirokawa ◽  
Yasuji Masubuchi ◽  
Shinichi Kikkawa
Keyword(s):  
Thin Film ◽  
Solid Solution ◽  
Thermal Decomposition ◽  
Sputter Deposition ◽  
Composite Target ◽  
Zinc Blende ◽  
Alloy Particles ◽  
Sputter Deposited ◽  
Magneto Resistance ◽  
Zinc Blende Structure

Sputter deposited Fe0.7Co0.3 nitride thin film had zinc blende structure. It was thermally decomposed completely back to the ferromagnetic Fe0.7Co0.3 alloy above 400°C. As-deposited nitride thin films obtained in cosputtering of (Fe0.7Co0.3)1-xAlx composite target with nitrogen sputter gas were solid solutions with zinc blende (x≤0.44) and wurtzite (x>0.5) type structure, respectively. The largest magneto resistance ratio of 0.24% was observed on the Fe0.7Co0.3 alloy particles dispersed in AlN thin film obtained by thermal decomposition of the nitride solid solution with x=0.66 at 500°C.

Far-Infrared Reflectivity and Dynamical Conductivity of an Epitaxial YBa 2 Cu 3 O 7-δ Thin Film

1989 ◽  
Vol 8 (7) ◽  
pp. 679-684 ◽  
Author(s):  
J Schützmann ◽  
W Ose ◽  
J Keller ◽  
K. F Renk ◽  
B Roas ◽  
...  
Keyword(s):  
Thin Film ◽  
Far Infrared ◽  
Infrared Reflectivity ◽  
Dynamical Conductivity

scholarly journals Between single ion magnets and macromolecules: a polymer/transition metal-based semi-solid solution

2018 ◽  
Vol 9 (36) ◽  
pp. 7277-7286 ◽  
Author(s):  
Anna M. Majcher ◽  
Paweł Dąbczyński ◽  
Mateusz M. Marzec ◽  
Magdalena Ceglarska ◽  
Jakub Rysz ◽  
...  
Keyword(s):  
Thin Film ◽  
Solid Solution ◽  
Transition Metal ◽  
Thin Film Form ◽  
Bulk Solid ◽  
New Material ◽  
Semi Solid ◽  
Film Form

A new material combining polymers and magnetic relaxations both in the bulk solid solution and in the thin film form.

Migrating from superconducting to semiconducting YBCO thin film bolometers as future far-infrared imaging pixels

2010 ◽  
Author(s):  
Vishal S. Jagtap ◽  
Mattia Longhin ◽  
Mukesh K. Kulsreshath ◽  
Alain J. Kreisler ◽  
Annick F. Dégardin
Keyword(s):  
Thin Film ◽  
Infrared Imaging ◽  
Far Infrared ◽  
Ybco Thin Film
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