Study of phase separation phenomena in half-doped manganites with isovalent substitution of rare-earth cations on example of Sm0.32Pr0.18Sr0.5MnO3

2019 ◽  
Vol 100 (18) ◽  
Author(s):  
A. I. Kurbakov ◽  
V. A. Ryzhov ◽  
V. V. Runov ◽  
E. O. Bykov ◽  
I. I. Larionov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Phase Separation ◽  
Isovalent Substitution ◽  
Doped Manganites

The Effect Of Isovalent Substitution In The Rare-Earth Subsystem On Ground Magnetic State Of A Single Crystal La1.4sr1.6mn2o7

2015 ◽  
Vol 10 (4) ◽  
pp. 95-99
Author(s):  
Nikolay Pavlovskii ◽  
Kirill Shaykhutdinov ◽  
Andrey Dubrovskiy ◽  
Mikhail Petrov ◽  
Konstantin Terent’ev ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Ground State ◽  
Sharp Increase ◽  
Magnetic State ◽  
Ferromagnetic State ◽  
Metamagnetic Transition ◽  
Isovalent Substitution ◽  
Ground Magnetic ◽  
Orbital Character

In this report we investigate changing of magnetic properties of system (La1-zNdz)1.4Sr1.6Mn2O7 during isovalent substitution from lanthanium to neodymium at different concentration z = 0, 0.3. Decreasing of Mn-Mn in-plane distance with increasing z leads to the suppression of the ferromagnetic state that, as expected, tells us about the change of the orbital character eg – electrons with 2 2 3z r d  on the 2 2 . x y d  Also, at high applied magnetic fields metamagnetic transition observed at concentration z = 0.3, it is characterized by a sharp increase of the magnetization and the change of the ground state of the sample from the antiferromagnetic to ferromagnetic.

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

Effect of the species of substituted ion on ferroelastic domain switching of rare-earth ion-doped ZrO2 pseudo-single crystals

1999 ◽  
Vol 14 (1) ◽  
pp. 142-145 ◽  
Author(s):  
Takanori Kiguchi ◽  
Atsushi Saiki ◽  
Kazuo Shinozaki ◽  
Nobuyasu Mizutani
Keyword(s):  
Rare Earth ◽  
Phase Separation ◽  
Single Crystals ◽  
Domain Switching ◽  
Volume Fraction ◽  
Rare Earth Ion ◽  
Microstructural Aspect ◽  
The Difference

The difference of domain switching amount of 3 mol% R2O3−ZrO2 (R = Yb, Y, Dy, Gd, Eu, Sm) pseudo-single crystals with additive cation species was investigated from the microstructural aspect. The switching amount of Yb, Y, Dy, and Gd substituted ZrO2 was three times higher than that of Eu and Sm. The amount corresponded to the volume fraction of the t′-phase, and it indicated that phase separation proceeded, especially in Eu and Sm substituted ZrO2.

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

Electronic phase separation and other novel phenomena and properties exhibited by mixed-valent rare-earth manganites and related materials

2007 ◽  
Vol 366 (1862) ◽  
pp. 63-82 ◽  
Author(s):  
Vijay B Shenoy ◽  
C.N.R Rao
Keyword(s):  
Rare Earth ◽  
Phase Separation ◽  
Transition Metal Oxides ◽  
Rare Earth Ion ◽  
Electronic Phase Separation ◽  
Spatially Correlated ◽  
Theoretical Approaches ◽  
Electronic Phase ◽  
Different Types ◽  
Rare Earth Manganites

Transition metal oxides, such as the mixed-valent rare-earth manganites Ln (1− x ) A x MnO 3 (Ln, rare-earth ion, and A, alkaline-earth ion), show a variety of electronic orders with spatially correlated charge, spin and orbital arrangements, which in turn give rise to many fascinating phenomena and properties. These materials are also electronically inhomogeneous, i.e. they contain disjoint spatial regions with different electronic orders. Not only do we observe signatures of such electronic phase separation in a variety of properties, but we can also observe the different ‘phases’ visually through different types of imaging. We discuss various experiments pertaining to electronic orders and electronic inhomogeneities in the manganites and present a discussion of theoretical approaches to their understanding. It is noteworthy that the mixed-valent rare-earth cobaltates of the type Ln (1− x ) A x CoO 3 also exhibit electronic inhomogeneities just as the manganites.

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