Role of lattice matching in epitaxy: Novel Ce phase and new fcc-bcc epitaxial relationship

1987 ◽  
Vol 36 (18) ◽  
pp. 9435-9438 ◽  
Author(s):  
Hitoshi Homma ◽  
Kai-Y. Yang ◽  
Ivan K. Schuller
Keyword(s):  
Epitaxial Relationship ◽  
Lattice Matching

Transmission Electron Microscopy studies of texture of Cr underlayer of magnetic recording hard disk

1991 ◽  
Vol 49 ◽  
pp. 580-581
Author(s):  
L. Tang ◽  
G. Thomas ◽  
M. R. Khan ◽  
S. L. Duan
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Transmission Electron Microscopy ◽  
Magnetic Recording ◽  
Magnetic Thin Films ◽  
Magnetic Films ◽  
Substrate Bias ◽  
Epitaxial Relationship ◽  
Transmission Electron

Cr thin films are often used as underlayers for Co alloy magnetic thin films, such as Co1, CoNi2, and CoNiCr3, for high density longitudinal magnetic recording. It is belived that the role of the Cr underlayer is to control the growth and texture of the Co alloy magnetic thin films, and, then, to increase the in plane coercivity of the films. Although many epitaxial relationship between the Cr underlayer and the magnetic films, such as ﹛1010﹜Co/ {110﹜Cr4, ﹛2110﹜Co/ ﹛001﹜Cr5, ﹛0002﹜Co/﹛110﹜Cr6, have been suggested and appear to be related to the Cr thickness, the texture of the Cr underlayer itself is still not understood very well. In this study, the texture of a 2000 Å thick Cr underlayer on Nip/Al substrate for thin films of (Co75Ni25)1-xTix dc-sputtered with - 200 V substrate bias is investigated by electron microscopy.

The role of lattice matching in improving the performance of PbSnTe IR photodiodes

1982 ◽  
Vol 3 (3) ◽  
pp. 66-68 ◽  
Author(s):  
S. Rotter ◽  
D. Kasemset ◽  
C.G. Fonstad
Keyword(s):  
Lattice Matching ◽  
Ir Photodiodes

Epitaxial Iridium Growth on Strontium Titanate

2000 ◽  
Vol 648 ◽  
Author(s):  
Z. Dai ◽  
A.P. Li ◽  
C. Bednarski ◽  
L. I. McCann ◽  
B. Golding
Keyword(s):  
Surface Roughness ◽  
Substrate Surface ◽  
Surface Preparation ◽  
Electron Beam Evaporation ◽  
Layer By Layer ◽  
Epitaxial Relationship ◽  
Ion Channeling ◽  
Substrate Temperatures ◽  
Subsequent Layer

AbstractEpitaxial (100) iridium films have been grown on (100) SrTiO3 (STO) substrates by electron beam evaporation. The epitaxial relationship between the iridium film and STO substrate was determined to be Ir(001)[100]//STO(001)[100]. A systematic study of the role of STO substrate surface preparation, Ir thickness, and substrate temperature on Ir film crystallinity and morpholo- gy has been performed. The best Ir films typically have small Ir(200) XRD linewidths < 0.3 °, surface roughness of 0.2 nm, and low ion channeling yields, χmin≤ 4%, when deposited at 800 °C. Films generally become smoother with better crystallinity when the film thickness approaches 300 nm. A growth mode with initial island formation and subsequent layer-by-layer appears to take place at higher substrate temperatures, whereas at lower temperatures the film grows in a 3D mode.

Role of the First Atomic Layers in Epitaxial Relationship and Interface Characteristics of SrTiO3 Films on CeO2/YSZ/Si(001)

2002 ◽  
Vol 747 ◽  
Author(s):  
Tomoaki Yamada ◽  
Takanori Kiguchi ◽  
Naoki Wakiya ◽  
Kazuo Shinozaki ◽  
Nobuyasu Mizutani
Keyword(s):  
Atomic Layer ◽  
Yttria Stabilized Zirconia ◽  
The Other ◽  
Stabilized Zirconia ◽  
Epitaxial Relationship ◽  
Electron Traps ◽  
Ion Drift ◽  
Interface Characteristics ◽  
Injection Type

ABSTRACTThe role of the first atomic layers in epitaxial relationship and interface characteristics of SrTiO3 films on CeO2/yttria-stabilized zirconia (YSZ)/Si(001) substrates was investigated. Although SrTiO3 film deposited on CeO2/YSZ/Si directly was preferentially (110)-oriented, epitaxial SrTiO3(001) films could be grown on CeO2/YSZ/Si by controlling first atomic layer of the films. In the case of SrTiO3 film starting from TiO2 layer, the neither ion drift nor charge injection occurred in the SrTiO3/CeO2 interface. On the other hand, for the film starting from SrO layer, an injection-type hysteresis was observed. This is probably due to the electron traps in the interface.

Epitaxial crystallization of polyphenylene sulfide: Lattice effects on structures

1989 ◽  
Vol 4 (4) ◽  
pp. 1005-1017 ◽  
Author(s):  
X. J. Qian ◽  
S. E. Rickert ◽  
J. B. Lando
Keyword(s):  
Alkali Halides ◽  
Substantial Effect ◽  
Polyphenylene Sulfide ◽  
Lattice Matching ◽  
Surface Steps ◽  
Wide Range ◽  
Direct Indication ◽  
Ionic Nature ◽  
Ionic Lattice

The investigation of dilute solution epitaxy of polyphenylene sulfide (PPS) has been carried out on a series of inorganic substrates, which cover a wide range of interatomic spacings, surface energies, and geometries. A variety of morphological arrangements of PPS on various substrates were observed. Both 〈100〉 and 〈110〉 epitaxial orientations were observed on monovalent alkali halides. While the 〈100〉 epitaxy is generally thought to grow upon nucleation on surface steps along the 〈100〉 direction, 〈110〉 epitaxy may also be nucleated on these surface steps. Changes in ionic lattice dimensions and ionic nature of the substrate have a substantial effect on the molecular packing of PPS and the resulting crystal orientations. Four new crystalline phases of PPS have resulted from the fold surface epitaxies on NaCl, KCl, KBr, and mica with favorable one- or two-dimensional lattice matching. This is a direct indication of the important role of lattice matching in inducing and defining the epitaxies and polymorphism of PPS.

scholarly journals Ru/TiO2-catalysed hydrogenation of xylose: the role of the crystal structure of the support

2016 ◽  
Vol 6 (2) ◽  
pp. 577-582 ◽  
Author(s):  
Carlos Hernandez-Mejia ◽  
Edwin S. Gnanakumar ◽  
Alma Olivos-Suarez ◽  
Jorge Gascon ◽  
Heather F. Greer ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Biomass Conversion ◽  
Lattice Matching

Lattice matching holds the secret to the Ru-catalysed hydrogenation of xylose to xylitol, a key reaction in practical biomass conversion.

scholarly journals Template design based on molecular and crystal structure similarity to regulate conformational polymorphism nucleation: the case of α,ω-alkanedicarboxylic acids

IUCrJ ◽  
2021 ◽  
Vol 8 (5) ◽  
Author(s):  
Jiawei Lin ◽  
Peng Shi ◽  
Ying Wang ◽  
Lingyu Wang ◽  
Yiming Ma ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Crystal Form ◽  
Preferred Orientation ◽  
Dynamics Simulation ◽  
Strong Interactions ◽  
Lattice Matching ◽  
Geometric Term ◽  
Structure Similarity ◽  
Template Design

Template design on polymorph control, especially conformational polymorphs, is still in its infancy and the result of polymorph control is often accidental. A method of regulating the crystallization of conformational polymorphs based on the crystal structure similarity of templates and the target crystal form has been developed. Crystal structure similarity was considered to be able to introduce lattice matching (geometric term) with chemical interactions to regulate conformational polymorph nucleation. The method was successfully applied to induce the crystallization of DA7-II [HOOC–(CH2) n −2–COOH (diacids), named DAn, where n = 7, 9, 15, 17 and II represents the metastable polymorph] on the surface of DA15-II. An analogous two-dimensional plane – the (002) face of both DA15-II and DA7-II – was firstly predicted as the epitaxially attached face with similar lattice parameters and the strongest adsorption energy. The powder DA15-II template with the preferred orientation face in (002) presented much stronger inducing DA7-II ability than the template with other preferred orientation faces. The epitaxial growth of DA7-II on DA15-II through an identical (002) face was clearly observed and verified by the single-crystal inducing experiments. The molecular dynamics simulation results demonstrated that the strong interactions occurred between DA7 molecules and the (002) face of DA15-II. This method has been verified and further applied to the crystallization of DA7-II on the surface of DA17-II and DA9-II on the surface of DA15-II. This study developed a strategy based on structure similarity to regulate the conformational polymorph and verified the significant role of lattice matching and chemical effects on the design and preparation of templates.

scholarly journals Role of the interface in controlling the epitaxial relationship between orthorhombic LaInO3 and cubic BaSnO3

2020 ◽  
Vol 4 (12) ◽  
Author(s):  
Martina Zupancic ◽  
Wahib Aggoune ◽  
Toni Markurt ◽  
Youjung Kim ◽  
Young Mo Kim ◽  
...  
Keyword(s):  
Epitaxial Relationship
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