Correlation between A-site cation randomness and colossal magnetoresistance effect in perovskite manganite

2006 ◽  
Vol 378-380 ◽  
pp. 520-521 ◽  
Author(s):  
T. Nakajima ◽  
Y. Ueda
Keyword(s):  
Colossal Magnetoresistance ◽  
Perovskite Manganite ◽  
Magnetoresistance Effect ◽  
Colossal Magnetoresistance Effect ◽  
A Site

Pressure-tuned colossal magnetoresistance effect in n-type CdCr2Se4

2021 ◽  
Vol 118 (26) ◽  
pp. 262407
Author(s):  
Bowen Zhang ◽  
Chuanchuan Gu ◽  
Chao An ◽  
Xuliang Chen ◽  
Yonghui Zhou ◽  
...  
Keyword(s):  
Colossal Magnetoresistance ◽  
Magnetoresistance Effect ◽  
Colossal Magnetoresistance Effect

Chemical disorder effects in transport and magnetic properties of perovskite manganite

2005 ◽  
Vol 20 (4) ◽  
pp. 813-817
Author(s):  
Subhayan Biswas ◽  
Sandip Chatterjee ◽  
P. Chatterjee ◽  
A.K. Nigam ◽  
S.K. De
Keyword(s):  
Magnetic Properties ◽  
Colossal Magnetoresistance ◽  
Lattice Mismatch ◽  
Perovskite Manganite ◽  
The Novel ◽  
Ionic Radii ◽  
Three Samples ◽  
Moderate Magnetic Field ◽  
A Site

The dependence of the novel properties observed in colossal magnetoresistance (CMR) materials, other than average ionic radii 〈rA〉 and Mn valence ratio (Mn3+/Mn4+), was investigated through examination of the transport and magnetic properties of Pr0.65(Ca0.7Sr0.3)0.35MnO3, La0.123Pr0.527(Ca0.8Sr0.2)0.35MnO3, and Pr0.65(Ca0.866Ba0.134)0.35MnO3. The average ionic radii 〈rA〉 and valence ratio of all three samples have been kept equal. The results of this investigation indicate a more intense role of the nature of individual A-site cation and the lattice mismatch. A remarkably large magnetoresistance of the order of 108 at moderate magnetic field has been observed for Ba-doped sample.

55Mn NMR observation of colossal magnetoresistance effect in Sm0.55Sr0.45MnO3

2017 ◽  
Vol 29 (26) ◽  
pp. 265802 ◽  
Author(s):  
J M Michalik ◽  
D Rybicki ◽  
Z Tarnawski ◽  
M Sikora ◽  
J M De Teresa ◽  
...  
Keyword(s):  
Colossal Magnetoresistance ◽  
Magnetoresistance Effect ◽  
Colossal Magnetoresistance Effect

scholarly journals COLOSSAL EFFECTS IN TRANSITION METAL OXIDES CAUSED BY INTRINSIC INHOMOGENEITIES

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3293-3293
Author(s):  
J. BURGY ◽  
M. MAYR ◽  
V. MARTIN-MAYOR ◽  
A. MOREO ◽  
E. DAGOTTO
Keyword(s):  
Transition Metal Oxides ◽  
Colossal Magnetoresistance ◽  
Cluster Formation ◽  
Magnetoresistance Effect ◽  
Random Orientation ◽  
First Order ◽  
First Order Transition ◽  
Colossal Magnetoresistance Effect ◽  
General Aspects ◽  
Quantum Critical Behavior

The general aspects of the influence of quenched disorder on the competition between ordered states separated by a first-order transition are investigated. A phase diagram with features resembling quantum-critical behavior is observed. The paramagnetic phase at low temperature consists of coexisting ordered clusters, with a random orientation of the order parameter. Specializing to manganites, this state is shown to have a colossal magnetoresistance effect. A new scale T* for cluster formation is predicted. It is argued that cuprates have similar features, compatible with the large proximity effect of the very underdoped regime.1

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