Microscopic electronic phase separation and metal-insulator transition inNd0.5Sr0.5MnO3

1999 ◽  
Vol 60 (18) ◽  
pp. 12963-12967 ◽  
Author(s):  
N. Fukumoto ◽  
S. Mori ◽  
N. Yamamoto ◽  
Y. Moritomo ◽  
T. Katsufuji ◽  
...  
Keyword(s):  
Phase Separation ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Electronic Phase Separation ◽  
Electronic Phase

scholarly journals Manipulating electronic phase separation in strongly correlated oxides with an ordered array of antidots

2015 ◽  
Vol 112 (31) ◽  
pp. 9558-9562 ◽  
Author(s):  
Kai Zhang ◽  
Kai Du ◽  
Hao Liu ◽  
X.-G. Zhang ◽  
Fanli Lan ◽  
...  
Keyword(s):  
Phase Separation ◽  
Nucleation And Growth ◽  
Insulator Transition ◽  
Epitaxial Thin Films ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Electronic Phase Separation ◽  
Electronic Phase ◽  
Ordered Array ◽  
Antidot Arrays

The interesting transport and magnetic properties in manganites depend sensitively on the nucleation and growth of electronic phase-separated domains. By fabricating antidot arrays in La0.325Pr0.3Ca0.375MnO3 (LPCMO) epitaxial thin films, we create ordered arrays of micrometer-sized ferromagnetic metallic (FMM) rings in the LPCMO films that lead to dramatically increased metal–insulator transition temperatures and reduced resistances. The FMM rings emerge from the edges of the antidots where the lattice symmetry is broken. Based on our Monte Carlo simulation, these FMM rings assist the nucleation and growth of FMM phase domains increasing the metal–insulator transition with decreasing temperature or increasing magnetic field. This study points to a way in which electronic phase separation in manganites can be artificially controlled without changing chemical composition or applying external field.

scholarly journals Anisotropic Phase Separation through the Metal-Insulator Transition in Amorphous Alloys

1994 ◽  
Vol 73 (8) ◽  
pp. 1118-1121 ◽  
Author(s):  
Michael J. Regan ◽  
Marybeth Rice ◽  
Marcela B. Fernandez van Raap ◽  
Arthur Bienenstock
Keyword(s):  
Phase Separation ◽  
Amorphous Alloys ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Anisotropic Phase

Magnetoelastic coupling in strained La0.7Ca0.3MnO3//BaTiO3 Thin Films

2013 ◽  
Vol 1587 ◽  
Author(s):  
A. Alberca ◽  
J. Azpeitia-Urkia ◽  
J. Tornos ◽  
C. Munuera ◽  
F. J. Mompean ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Separation ◽  
Curie Temperature ◽  
Insulator Transition ◽  
Strong Tendency ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Interfacial Effects ◽  
Magnetoelastic Coupling ◽  
Highly Strained

ABSTRACTIn this paper, we explore the interfacial effects appearing in highly strained La0.7Ca0.3MnO3 (LCMO) ultra-thin films (10-12nm) grown on BaTiO3 (BTO) ferroelectric substrates. The strong tendency to phase separation of this optimally doped manganite contributes to the exotic phenomena observed in magnetism and transport experiments: the so-called Matteucci magnetic loops, magnetic granularity and a second metal insulator transition are observed between 50K and the LCMO Curie temperature, 180K. All these properties define the multiferroic character of these heterostructures, which in LCMO//BTO system is strongly linked to magnetoelastic coupling.

Giant 1/f Noise in Low-Tc CMR Manganites: Evidence of the Percolation Threshold

1999 ◽  
Vol 602 ◽  
Author(s):  
V. Podzorov ◽  
M. Uehara ◽  
M. E. Gershenson ◽  
T. Y. Koo ◽  
S-W. Cheong
Keyword(s):  
Phase Separation ◽  
Single Crystal ◽  
Percolation Threshold ◽  
Single Crystals ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Percolation Network

AbstractWe observed a dramatic peak in the 1/f noise at the metal-insulator transition (MIT) in low-Tc, manganites. This many-orders-of-magnitude noise enhancement is observed for both polycrystalline and single-crystal samples of La5/8−y. Pry, Ca3/8MnO3 (y = 0.35 – 0.4) and Pr1−xCaxMnO3 (x = 0.35 – 0.5). This observation strongly suggests that the microscopic phase separation in the low-Tc, manganites causes formation of a percolation network, and that the observed MIT is a percolation threshold. It is shown that the scale of phase separation in polycrystalline samples is much smaller than that in single crystals.

Direct Mapping of Phase Separation across the Metal–Insulator Transition of NdNiO3

Nano Letters ◽  
2018 ◽  
Vol 18 (4) ◽  
pp. 2226-2232 ◽  
Author(s):  
Daniele Preziosi ◽  
Laura Lopez-Mir ◽  
Xiaoyan Li ◽  
Tom Cornelissen ◽  
Jin Hong Lee ◽  
...  
Keyword(s):  
Phase Separation ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Direct Mapping

scholarly journals The metal-insulator transition in Y1−xCaxTiO3caused by structural phase separation

2002 ◽  
Vol 58 (s1) ◽  
pp. c147-c147 ◽  
Author(s):  
K. Kato ◽  
E. Nishibori ◽  
M. Takata ◽  
M. Sakata ◽  
T. Nakano ◽  
...  
Keyword(s):  
Phase Separation ◽  
Structural Phase ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator
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