Oxide electronics

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Structural anomalies, oxygen ordering and superconductivity in YBa2Cu3O6+x

Chapter in Neutron scattering in layered copper-oxide superconductors, Kluwer Academic Publishers (1998) 2

Abstract:

This is the first book which reviews the most important results obtained in the past decade for layered copper-oxide high-temperature superconductors by neutron ...
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ChemInform Abstract: Neutron Diffraction Study of the Structural and Electronic Properties of Sr2HoMn2O7 and Sr2YMn2O7.

ChemInform Wiley 29:13 (1998) no-no

Authors:

PD BATTLE, JE MILLBURN, MJ ROSSEINSKY, LE SPRING, JF VENTE, PG RADAELLI
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Magnetic and Electric properties of La_{1-delta}MnO_{3}

(1998)

Authors:

S de Brion, F Ciorcas, G Chouteau, P Lejay, P Radaelli, C Chaillout
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Magnetic and Electric properties of La_{1-delta}MnO_{3}

ArXiv cond-mat/9803024 (1998)

Authors:

S de Brion, F Ciorcas, G Chouteau, P Lejay, P Radaelli, C Chaillout

Abstract:

The magnetic phase diagram of $La_{1-\delta}MnO_{3}$ powdered samples have been studied as a function of $\delta $ in the low doping range. $La_{0.97}MnO_{3}$ has a canted magnetic structure at low temperature $(\theta \simeq 130\QTR{group}{{}^{\circ}})$. Above $T_{C}=118K$, it becomes a paramagnet with a huge effective magnetic moment, $\mu_{eff}=6.0\mu_{B}$, reflecting the presence of magnetoelastic polarons which are not affected by the magnetic field (up to 20T) nor the temperature $(1.2T_{C}
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A transition from large to small polarons in the La0.75Ca0.25MnO3 perovskite system

Journal of Physics and Chemistry of Solids 59:10-12 (1998) 2220-2223

Authors:

A Lanzara, NL Saini, M Brunelli, F Natali, A Bianconi, P Radaelli, SW Cheong

Abstract:

A quantitative determination of the statistical distribution of the Mn-O instantaneous bond lengths in the La0.75Ca0.25MnO3 system by Mn K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy shows that the giant magneto-resistance (GMR) transition occurs at a crossover from a metallic phase with large (or intermediate) polarons to an insulating phase where small polarons coexist with large (or intermediate) polarons. In the GMR region, the two Mn polaronic domains coexist and share half of the space. © 1998 Published by Elsevier Science Ltd. All rights reserved.
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