The dynamical influences from physical properties in the lower mantle and post-perovskite phase transition

2007 ◽  
pp. 249-270 ◽  
Author(s):  
David A. Yuen ◽  
Ctirad Matyska ◽  
Ondřej Čadek ◽  
Masanori Kameyama
Keyword(s):  
Phase Transition ◽  
Physical Properties ◽  
Lower Mantle ◽  
Perovskite Phase

scholarly journals Study of physical properties of a ferrimagnetic spinel Cu1.5Mn1.5O4: spin dynamics, magnetocaloric effect and critical behavior

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25664-25676
Author(s):  
Abir Hadded ◽  
Jalel Massoudi ◽  
Sirine Gharbi ◽  
Essebti Dhahri ◽  
A. Tozri ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Physical Properties ◽  
Magnetocaloric Effect ◽  
Phase Transition Temperature ◽  
Magnetic Phase Transition ◽  
Critical Behavior ◽  
Magnetic Phase ◽  
Spin Dynamics ◽  
Critical Behaviour

The present work reports a detailed study of the spin dynamics, magnetocaloric effect and critical behaviour near the magnetic phase transition temperature, of a ferrimagnetic spinel Cu1.5Mn1.5O4.

Synthesis and Properties of Biodegradable Liquid Crystalline Poly(ester-Urethane)s Based on Poly(L-Lactic Acid)

2013 ◽  
Vol 652-654 ◽  
pp. 459-462
Author(s):  
Ya Tong Guo ◽  
Zhu Zheng ◽  
Zhen Qi Hou ◽  
Jie Du
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Lactic Acid ◽  
Physical Properties ◽  
Liquid Crystalline ◽  
Degradation Rate ◽  
Hydrolytic Degradation ◽  
Hexamethylene Diisocyanate ◽  
Solution Polymerization ◽  
Phase Transition Temperatures

A series of biodegradable segmented liquid crystalline poly(ester-urethane)s were prepared by solution polymerization of poly(L-lactic acid) (PLLA), mesogenic diol prepolymer poly(butylene terephthaloyldioxy dibenzoates) (MD), and hexamethylene diisocyanate (HDI). The MD content was varied from 0 to 40 mol% so that the effects of the mesogen content on the thermal and physical properties, and hydrolytic degradation were examined respectively. It was found that introducing mesogens units could increase the thermal stability and the elastic properties, while reduced the phase transition temperatures and the hydrolytic degradation rate.

scholarly journals In situ measurements of the majorite-akimotoite-perovskite phase transition boundaries in MgSiO3

2001 ◽  
Vol 28 (23) ◽  
pp. 4351-4354 ◽  
Author(s):  
Kei Hirose ◽  
Tetsuya Komabayashi ◽  
Motohiko Murakami ◽  
Ken-ichi Funakoshi
Keyword(s):  
Phase Transition ◽  
Perovskite Phase ◽  
In Situ Measurements

Stabilization of perovskite phase and dielectric properties of Pb(Zn, Mg)1/3Nb2/3O3-PbTiO3 ceramics prepared by excess constituent oxides

1994 ◽  
Vol 9 (10) ◽  
pp. 2634-2644 ◽  
Author(s):  
Hyun M. Jang ◽  
Kyu-Mann Lee ◽  
Moon-Ho Lee
Keyword(s):  
Phase Transition ◽  
Diffuse Phase Transition ◽  
Short Range ◽  
Perovskite Phase ◽  
Complex Impedance ◽  
Pyrochlore Phase ◽  
Charge Carriers ◽  
Pbtio3 Ceramics ◽  
Additional Formation ◽  
Diffuse Phase

The perovskite phase in PZN-PMN-PT (PbZn1/3Nb2/3O3-PbMg1/3Nb2/3O3-PbTiO3) pseudoternary ceramics was stabilized by the addition of excess constituent divalent oxides (PbO, MgO, and ZnO). 5 mol% excess MgO or 7.5 mol% excess PbO was sufficient to eliminate the remnant cubic pyrochlore phase after sintering at 1100 °C for 1 h. The enhanced diffuse phase transition (DPT) and the decrease in the electrical resistivity were observed in the presence of excess ZnO or MgO. These were interpreted in terms of the additional formation of negatively charged, short-range ordered 1: 1 domains with a concomitant generation of charge carriers (holes). The behavior of excess MgO or ZnO at concentrations above 5 mol% was studied by examining complex impedance patterns.

Photo-induced guest-host interactions produce chiral conglomerates accompanying grain boundaries in a smectic phase

2021 ◽  
Author(s):  
Hideaki Sasaki ◽  
Koudai Abe ◽  
Masanobu Sagisaka ◽  
Atsushi Yoshizawa
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Physical Properties ◽  
Grain Boundaries ◽  
Smectic Phase ◽  
Host Interactions

Photo-induced isomerization of an azobenzene unit not only induces phase transition between two different phases but also brings marked changes of physical properties in solids and liquid crystals. We prepared...

Lattice reconstruction of La-incorporated CsPbI2Br with suppressed phase transition for air-processed all-inorganic perovskite solar cells

2020 ◽  
Vol 8 (10) ◽  
pp. 3351-3358 ◽  
Author(s):  
Shoulong Chen ◽  
Tianju Zhang ◽  
Xiaolin Liu ◽  
Jinli Qiao ◽  
Lin Peng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solar Cells ◽  
Perovskite Phase ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite

A stable CsPbI2Br perovskite phase can be achieved when doped with an appropriate amount of La3+ ions.

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