Interrelation between Phase Separation and Physical Properties of Doped Manganites

hamon ◽  
2006 ◽  
Vol 16 (4) ◽  
pp. 204-208
Author(s):  
Yutaka Moritomo
Keyword(s):  
Phase Separation ◽  
Physical Properties ◽  
Doped Manganites

scholarly journals Functional Nanoscale Phase Separation and Intertwined Order in Quantum Complex Materials

2021 ◽  
Vol 6 (4) ◽  
pp. 40
Author(s):  
Gaetano Campi ◽  
Antonio Bianconi
Keyword(s):  
Phase Separation ◽  
High Temperature ◽  
Physical Properties ◽  
High Precision ◽  
High Temperature Superconductors ◽  
Complex Materials ◽  
Structural Units ◽  
X Ray ◽  
Nanoscale Phase Separation ◽  
Complex Matter

Nanoscale phase separation (NPS), characterized by particular types of correlated disorders, plays an important role in the functionality of high-temperature superconductors (HTS). Our results show that multiscale heterogeneity is an essential ingredient of quantum functionality in complex materials. Here, the interactions developing between different structural units cause dynamical spatiotemporal conformations with correlated disorder; thus, visualizing conformational landscapes is fundamental for understanding the physical properties of complex matter and requires advanced methodologies based on high-precision X-ray measurements. We discuss the connections between the dynamical correlated disorder at nanoscale and the functionality in oxygen-doped perovskite superconducting materials.

Phase Separation and Destabilization of the Charge-Ordered State in Cr-Doped Manganites

2001 ◽  
Vol 70 (1) ◽  
pp. 267-271 ◽  
Author(s):  
Ryuichi Shoji ◽  
Shigeo Mori ◽  
Naoki Yamamoto ◽  
Akihiko Machida ◽  
Yutaka Moritomo ◽  
...  
Keyword(s):  
Phase Separation ◽  
Doped Manganites ◽  
Ordered State

The effect of a cation radii on physical properties of doped manganites

1999 ◽  
Vol 70 (3) ◽  
pp. 197-210 ◽  
Author(s):  
N. Abdelmoula ◽  
J. Dhahri ◽  
K. Guidara ◽  
E. Dhahri ◽  
J. C. Joubert
Keyword(s):  
Physical Properties ◽  
Doped Manganites

Colossal magnetoresistance in doped manganites: A consequence of percolation and phase separation

2001 ◽  
Vol 79 (4) ◽  
pp. 506-508 ◽  
Author(s):  
A. K. Pradhan ◽  
Y. Feng ◽  
B. K. Roul ◽  
D. R. Sahu
Keyword(s):  
Phase Separation ◽  
Colossal Magnetoresistance ◽  
Doped Manganites

Phase separation and insulator-metal behavior of doped manganites

2000 ◽  
Vol 62 (6) ◽  
pp. 3883-3887 ◽  
Author(s):  
A. Machida ◽  
Y. Moritomo ◽  
E. Nishibori ◽  
M. Takata ◽  
M. Sakata ◽  
...  
Keyword(s):  
Phase Separation ◽  
Doped Manganites

scholarly journals Membrane composition can influence the rate of Al3+-mediated lipid oxidation: effect of galactolipids

1998 ◽  
Vol 333 (3) ◽  
pp. 833-838 ◽  
Author(s):  
Sandra V. VERSTRAETEN ◽  
Carl L. KEEN ◽  
Mari S. GOLUB ◽  
Patricia I. OTEIZA
Keyword(s):  
Phase Separation ◽  
Physical Properties ◽  
Lipid Oxidation ◽  
Molar Ratio ◽  
Membrane Composition ◽  
Postnatal Exposure ◽  
Stimulatory Action ◽  
Myelin Lipid ◽  
Oxidation Rates

In the first part of the present study we investigated the effects of pre-natal and early postnatal exposure of mice to high levels of dietary Al3+ on myelin lipid composition and lipid oxidation. We found: (1) a significantly higher (104%; P< 0.01) content of brain myelin galactolipids in the high-Al3+ group than in controls, and, (2) a significant correlation (r2 = 0.70; P< 0.01) between the concentration of myelin galactolipids and TBARS (2-thiobarbituric acid-reactive substances) content, a parameter of lipid oxidation. Based on these results, we evaluated in an in vitro model (liposomes) whether galactolipids could affect the capacity of Al3+ to stimulate Fe2+-initiated lipid oxidation, and whether this effect could be due to the promotion of changes in membrane physical properties (membrane phase separation and rigidification). The presence of galactolipids (10–40 mol%) in the liposomes caused a concentration-dependent increase in the stimulatory effect of Al3+ on Fe2+-induced TBARS production, and on the ability of Al3+ to induce phase separation and membrane rigidification. The capacity of Al3+ (10–100 µM) to induce lateral phase separation in liposomes composed of phosphatidylcholine/phosphatidylserine/galactolipid (36:24:40, molar ratio) was correlated significantly (r2 = 0.99; P< 0.001) with the stimulatory action of Al3+ on Fe2+-induced TBARS production. We propose that the high content of galactolipids found in myelin from Al3+-intoxicated mice could favour Al3+-induced changes in membrane physical properties, with the subsequent acceleration of lipid oxidation rates.

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