scholarly journals Physical properties of single-crystalline fibers of the colossal-magnetoresistance manganite La0.7Ca0.3MnO3

2003 ◽  
Vol 83 (15) ◽  
pp. 3135-3137 ◽  
Author(s):  
C. A. Cardoso ◽  
F. M. Araujo-Moreira ◽  
M. R. B. Andreeta ◽  
A. C. Hernandes ◽  
E. R. Leite ◽  
...  
Keyword(s):  
Physical Properties ◽  
Colossal Magnetoresistance ◽  
Single Crystalline

scholarly journals High-pressure synthesis and physical properties of A-site ordered perovskites

2014 ◽  
Vol 70 (a1) ◽  
pp. C755-C755
Author(s):  
Youwen Long
Keyword(s):  
High Pressure ◽  
Transition Metal ◽  
Physical Properties ◽  
Colossal Magnetoresistance ◽  
Research Work ◽  
Negative Thermal Expansion ◽  
Transition Metal Ions ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
A Site

ABO3-type perovskite oxides exhibit a wide variety of interesting physical properties such as superconductivity, colossal magnetoresistance, multiferroic behavior etc. For a simple ABO3 perovskite, if three quarters of the A site is replaced by a transition metal A', then the so-called A-site ordered double perovskite with the chemical formula of AA'3B4O12 can form. Since both A' and B sites accommodate transition metal ions, in addition to conventional B-B interaction, the new A'-A' and/or A'-B interaction is possible to show up, giving rise to the presence of many novel physical properties. Here we will show our recent research work on the high-pressure synthesis of several A-site ordered perovskites as well as a series of interesting physical properties like temperature- and pressure-induced intermetallic charge transfer, negative thermal expansion, magnetoelectric coupling multiferroic and so on. [1-3]

Hard Template Synthesis of Mesoporous and Nanocrystalline Alkali Metal Niobates with Enhanced Photocatalytic Performance

2013 ◽  
Vol 367 ◽  
pp. 12-15
Author(s):  
Qing Li ◽  
Li Ya Wang ◽  
Xiu Kai Li
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Physical Properties ◽  
Template Synthesis ◽  
Solid State Reaction ◽  
Alkali Metals ◽  
Photocatalytic Performance ◽  
Hard Template ◽  
Single Crystalline

A nanocasting method using SBA-15 as a hard template was adopted to prepare mesoporous nanocrystalline ANbO3 (A = Li, Na, and K) samples. The characteristics of samples werecharacterized by techniques such asXRD, N2-sorption measurement, HRTEM and UVDRS. It was found that thealkality of the alkali metals could have profound impacts on the synthesis andthe physical properties of samples. The Li, Na, and K precursors can reacteasily with the siliceous template, and the reactivity varies with the alkalityof the alkali metal. The synthesis of KNbO3 is unsuccessful because of the high alkality ofK. The templated LiNbO3 andNaNbO3 consist of single crystalline nanoparticles that generate interparticle mesoporosity. The LiNbO3andNaNbO3 samples showed notably enhanced photocatalytic activitiesfor 2-propanol photodegradation in comparison to the counterparts prepared bythe solid state reaction.

scholarly journals Structures and Physical Properties of Metal-MgO Single Crystalline Composite Films

1990 ◽  
Vol 31 (7) ◽  
pp. 588-594 ◽  
Author(s):  
Nobuo Tanaka ◽  
Kouji Kimoto ◽  
Fukio Yoshizaki ◽  
Kazuhiro Mihama
Keyword(s):  
Physical Properties ◽  
Composite Films ◽  
Single Crystalline
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