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

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

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

scholarly journals Probing the Phase Separation in the Doped Manganites by the Magnetic Resonance Methods

2004 ◽  
Vol 105 (1-2) ◽  
pp. 69-80 ◽  
Author(s):  
N. Volkov ◽  
G. Petrakovskii ◽  
K. Sablina ◽  
K. Patrin
Keyword(s):  
Phase Separation ◽  
Magnetic Resonance ◽  
Doped Manganites

scholarly journals Chemical ordering suppresses large-scale electronic phase separation in doped manganites

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Yinyan Zhu ◽  
Kai Du ◽  
Jiebin Niu ◽  
Lingfang Lin ◽  
Wengang Wei ◽  
...  
Keyword(s):  
Phase Separation ◽  
Large Scale ◽  
Electronic Phase Separation ◽  
Chemical Ordering ◽  
Electronic Phase ◽  
Doped Manganites

Structural study of the electron-doped manganites Sm0.1Ca0.9MnO3 and Pr0.1Sr0.9MnO3: Evidence of phase separation

2000 ◽  
Vol 62 (10) ◽  
pp. 6442-6449 ◽  
Author(s):  
C. Martin ◽  
A. Maignan ◽  
M. Hervieu ◽  
B. Raveau ◽  
Z. Jirák ◽  
...  
Keyword(s):  
Phase Separation ◽  
Structural Study ◽  
Doped Manganites

scholarly journals Phase Separation and Phase Diagram in Lightly Doped Manganites: Temperature and Magnetic Field Effects

1999 ◽  
Vol 52 (2) ◽  
pp. 247 ◽  
Author(s):  
Liang-Jian Zou ◽  
H. Q. Lin
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Phase Separation ◽  
Doping Concentration ◽  
Double Exchange ◽  
Magnetic Field Effects ◽  
Jahn Teller ◽  
Doped Manganites ◽  
And Shifts ◽  
Canted Phase

The effects of magnetic field and temperature on the phase separation and phase diagram of lightly doped manganites are studied. Based on the double exchange model with on-site Coulomb interaction, we show that in the case of a homogeneous charge distribution, the canting angle of localised core spins and the critical doping concentration of the system from canted phase to ferromagnetic (FM) phase become large because the effective FM coupling between localised core spins is weakened when the temperature increases. The boundary of the canted phase and FM phase shifts to a high doping concentration regime at high temperatures. In comparison with with the zero-temperature result, the phase separation can take place more easily in lightly doped manganites at finite temperatures. The application of a magnetic field decreases the energy of the FM cluster in the system, favours the separation of the hole-rich FM phase from the antiferromagnetic (AFM) background, and shifts the cant-FM border to the low doping regime. The effect of the Jahn-Teller electron-phonon coupling on the phase diagram and phase separation is also discussed.

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