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High-resolution neutron powder-diffraction in CMR manganates

Abstract

Manganese-oxide materials have recently been the subject of renewed attention, due to the `colossal` magnetoresistance (CMR) displayed near the spin-ordering temperature T{sub c} by some of these compounds. CMR has been evidenced in at least three families of manganese oxides. In most cases, the CMR compounds behave as paramagnetic semiconductors at high temperatures, and as ferromagnetic metals below T{sub c}. The study of this metallization process has lead some theorists to challenge its traditional interpretation in terms of the so-called double-exchange mechanism, and to propose alternative scenarios in which the coupling of the charge carriers with the lattice plays a paramount role. Powder diffraction method, being at the forefront of CMR research is presented. (author). 4 refs.
Authors:
Suard, E; Radaelli, P G [1] 
  1. Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France)
Publication Date:
Apr 01, 1997
Product Type:
Technical Report
Report Number:
ILL-RA-1996
Reference Number:
SCA: 665100; PA: AIX-29:017479; EDB-98:056630; SN: 98001951576
Resource Relation:
Other Information: DN: 4 refs.; PBD: Apr 1997; Related Information: Is Part Of Annual Report 96; PB: [121] p.
Subject:
66 PHYSICS; FERROMAGNETIC MATERIALS; MAGNETORESISTANCE; MANGANATES; NEUTRON DIFFRACTION; PARAMAGNETISM; SEMICONDUCTOR MATERIALS; SPATIAL RESOLUTION
OSTI ID:
593269
Research Organizations:
Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France).
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE98617526; TRN: FR9704862017479
Availability:
INIS; OSTI as DE98617526
Submitting Site:
FRN
Size:
pp. 59-61
Announcement Date:

Citation Formats

Suard, E, and Radaelli, P G. High-resolution neutron powder-diffraction in CMR manganates. France: N. p., 1997. Web.
Suard, E, & Radaelli, P G. High-resolution neutron powder-diffraction in CMR manganates. France.
Suard, E, and Radaelli, P G. 1997. "High-resolution neutron powder-diffraction in CMR manganates." France.
@misc{etde_593269,
title = {High-resolution neutron powder-diffraction in CMR manganates}
author = {Suard, E, and Radaelli, P G}
abstractNote = {Manganese-oxide materials have recently been the subject of renewed attention, due to the `colossal` magnetoresistance (CMR) displayed near the spin-ordering temperature T{sub c} by some of these compounds. CMR has been evidenced in at least three families of manganese oxides. In most cases, the CMR compounds behave as paramagnetic semiconductors at high temperatures, and as ferromagnetic metals below T{sub c}. The study of this metallization process has lead some theorists to challenge its traditional interpretation in terms of the so-called double-exchange mechanism, and to propose alternative scenarios in which the coupling of the charge carriers with the lattice plays a paramount role. Powder diffraction method, being at the forefront of CMR research is presented. (author). 4 refs.}
place = {France}
year = {1997}
month = {Apr}
}