Large lattice distortions associated with the magnetic transition in La0.7Sr0.3MnO3
(2013) In Physical Review B (Condensed Matter and Materials Physics) 88(24).- Abstract
- Colossal magnetoresistance (CMR) is associated with the phase transition from a metallic ferromagnetic to insulating paramagnetic phase, which can be controlled by an applied magnetic field. The insulating phase occurs due to trapping of the charge carriers by polaronic lattice distortions, which raise the resistivity. Theories based on local physics predict that the magnitude of the resistivity jump at T-C is determined by how much, on average, the amplitude of these distortions increases at the phase transition. Using neutron scattering, we measured the average distortion amplitude in La0.7Sr0.3MnO3. Surprisingly, its increase from below to above T-C is just as large as in other manganites, which have a much larger resistivity jump. This... (More)
- Colossal magnetoresistance (CMR) is associated with the phase transition from a metallic ferromagnetic to insulating paramagnetic phase, which can be controlled by an applied magnetic field. The insulating phase occurs due to trapping of the charge carriers by polaronic lattice distortions, which raise the resistivity. Theories based on local physics predict that the magnitude of the resistivity jump at T-C is determined by how much, on average, the amplitude of these distortions increases at the phase transition. Using neutron scattering, we measured the average distortion amplitude in La0.7Sr0.3MnO3. Surprisingly, its increase from below to above T-C is just as large as in other manganites, which have a much larger resistivity jump. This result suggests that the strength of CMR is determined not by the size of distortions, but by their cooperative nature, specific to each compound. Existing theories need to be extended to include correlations between different unit cells to explain and predict the strength of CMR. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4265889
- author
- Weber, F. ; Argyriou, Dimitri LU ; Prokhnenko, O. and Reznik, D.
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 88
- issue
- 24
- article number
- 241106
- publisher
- American Physical Society
- external identifiers
-
- wos:000328678600002
- scopus:84890597130
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.88.241106
- language
- English
- LU publication?
- yes
- id
- fc6ab973-e38b-41a0-a6d3-61af279229b1 (old id 4265889)
- date added to LUP
- 2016-04-01 13:13:10
- date last changed
- 2022-03-29 06:13:09
@article{fc6ab973-e38b-41a0-a6d3-61af279229b1,
abstract = {{Colossal magnetoresistance (CMR) is associated with the phase transition from a metallic ferromagnetic to insulating paramagnetic phase, which can be controlled by an applied magnetic field. The insulating phase occurs due to trapping of the charge carriers by polaronic lattice distortions, which raise the resistivity. Theories based on local physics predict that the magnitude of the resistivity jump at T-C is determined by how much, on average, the amplitude of these distortions increases at the phase transition. Using neutron scattering, we measured the average distortion amplitude in La0.7Sr0.3MnO3. Surprisingly, its increase from below to above T-C is just as large as in other manganites, which have a much larger resistivity jump. This result suggests that the strength of CMR is determined not by the size of distortions, but by their cooperative nature, specific to each compound. Existing theories need to be extended to include correlations between different unit cells to explain and predict the strength of CMR.}},
author = {{Weber, F. and Argyriou, Dimitri and Prokhnenko, O. and Reznik, D.}},
issn = {{1098-0121}},
language = {{eng}},
number = {{24}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Large lattice distortions associated with the magnetic transition in La0.7Sr0.3MnO3}},
url = {{http://dx.doi.org/10.1103/PhysRevB.88.241106}},
doi = {{10.1103/PhysRevB.88.241106}},
volume = {{88}},
year = {{2013}},
}