Composition dependence of the local structure and transparency of Gd2O3–B2O3 binary glasses prepared via aerodynamic levitation

AbstractEffects of off-stoichiometry and Nb substitution on the dielectric anomaly and ferroelectric properties have been investigated for SrBi2Ta2O9(SBT) thin films. Local atomic environment for the stoichiometric and off-stoichiometric SBT films has been also measured. The features of the dielectric anomaly, the Curie temperature (Tc), and the temperature dependence of the spontaneous polarization (Ps) are independent of the film thickness, and are governed by the nature of the crystal. For the stoichiometric Sr content SBT films, the grain size increases and the temperature dependence of the remanent polarization (Pr) decreases with increasing thickness. For the films with Sr/Bi/Ta = 0.8/2/2 and 0.8/2.2/2, Sr deficient local structure was observed, and such lattice structure probably leads to higher Tc than the stoichiometric crystal. Nb substitution for Ta also raises Tc, and makes the dielectric anomaly sharper. The phase transition associated with the dielectric anomaly for these films is thought to be first-order.

Download Full-text

Composition dependence of local structure in lanthanoborate glasses

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2004.12.121 ◽

2006 ◽

Vol 408-412 ◽

pp. 1238-1241 ◽

Cited By ~ 10

Author(s):

Akihiko Kajinami ◽

Masanori Nakamura ◽

Shigehito Deki

Keyword(s):

Local Structure ◽

Composition Dependence

Download Full-text

Studies on electrical switching behavior of As-Te-Tl glasses – effect of local structure on switching type and composition dependence of switching voltages

Applied Physics A ◽

10.1007/s00339-005-3373-3 ◽

2005 ◽

Vol 82 (2) ◽

pp. 345-348 ◽

Cited By ~ 13

Author(s):

B.H. Sharmila ◽

S. Asokan

Keyword(s):

Local Structure ◽

Composition Dependence ◽

Switching Behavior ◽

Electrical Switching ◽

Switching Type

Download Full-text

Composition Dependence of Average and Local Structure and Thermodynamic Stability for xLi(Li1/3Mn2/3)O2-(1-x)Li(Mn1/3Ni1/3Co1/3)O2 as a Cathode Active Material for Li-Ion Battery

ECS Meeting Abstracts ◽

10.1149/ma2012-02/2/57 ◽

2012 ◽

Keyword(s):

Thermodynamic Stability ◽

Local Structure ◽

Composition Dependence ◽

Active Material ◽

Li Ion Battery ◽

Li Ion

Download Full-text

Composition dependence of average and local structure of xLi(Li1/3Mn2/3)O2–(1 − x)Li(Mn1/3Ni1/3Co1/3)O2 active cathode material for Li ion batteries

Journal of Power Sources ◽

10.1016/j.jpowsour.2014.02.034 ◽

2014 ◽

Vol 259 ◽

pp. 195-202 ◽

Cited By ~ 10

Author(s):

Yasushi Idemoto ◽

Masahiro Inoue ◽

Naoto Kitamura

Keyword(s):

Cathode Material ◽

Local Structure ◽

Composition Dependence ◽

Li Ion Batteries ◽

Li Ion

Download Full-text

X-ray microprobe for materials science

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100168013 ◽

1994 ◽

Vol 52 ◽

pp. 56-57

Author(s):

G.E. Ice

Keyword(s):

Crystallographic Orientation ◽

Local Structure ◽

Materials Science ◽

Chemical Information ◽

X Ray Diffraction ◽

Ray Optics ◽

X Ray ◽

Novel Materials ◽

New Information ◽

Elemental Sensitivity

The increasing availability of synchrotron x-ray sources has stimulated the development of advanced hard x-ray (E≥5 keV) microprobes. With new x-ray optics these microprobes can achieve micron and submicron spatial resolutions. The inherent elemental and crystallographic sensitivity of an x-ray microprobe and its inherently nondestructive and penetrating nature will have important applications to materials science. For example, x-ray fluorescent microanalysis of materials can reveal elemental distributions with greater sensitivity than alternative nondestructive probes. In materials, segregation and nonuniform distributions are the rule rather than the exception. Common interfaces to whichsegregation occurs are surfaces, grain and precipitate boundaries, dislocations, and surfaces formed by defects such as vacancy and interstitial configurations. In addition to chemical information, an x-ray diffraction microprobe can reveal the local structure of a material by detecting its phase, crystallographic orientation and strain.Demonstration experiments have already exploited the penetrating nature of an x-ray microprobe and its inherent elemental sensitivity to provide new information about elemental distributions in novel materials.

Download Full-text