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Origin of colossal magnetoresistance in LaMnO 3 manganite

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [2]
  1. High Pressure Synergetic Consortium, Geophysical Laboratory,Carnegie Institution of Washington, Argonne, IL 60439,
  2. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015,
  3. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco, E-28049 Madrid, Spain,
  4. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015,, Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China,
  5. Department of Chemistry, University of Pavia, I-27100 Pavia, Italy,, Italian National Consortium for Materials Science and Technology, University of Pavia Research Unit, I-27100 Pavia, Italy,
  6. Department of Physics, University of Rome “Sapienza,” I-00185 Rome, Italy,
  7. Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211
+ Show Author Affiliations
Significance

Magnetoresistance is the change of resistance in the presence of an external magnetic field. In rare-earth manganite compounds, this change is orders of magnitude stronger than usual and it is promising for developing new spintronic and electronic devices. The colossal magnetoresistance (CMR) effect has been observed only in chemically doped manganite compounds. We report the realization of CMR in a compressed single-valent LaMnO 3 manganite compound. Pressure generates an inhomogeneous phase constituted by two components: a nonconductive one with a unique structural distortion and a metallic one without distortion. The CMR takes place when the competition between the two phases is at a maximum. We identify phase separation as the driving force for generating CMR in LaMnO 3 .

Research Organization:
Carnegie Inst. of Washington, Washington, DC (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree); Spanish National Research Council (CSIC), Madrid (Spain); Univ. of Missouri, Columbia, MO (United States)
Sponsoring Organization:
European Union (EU) (Belgium); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Contributing Organization:
Center for High Pressure Science and Technology Advanced Research, Shanghai (China); Sapienza Univ. of Rome (Italy); Univ. of Pavia (Italy)
Grant/Contract Number:
FG02-00ER45818; SC0001057
OSTI ID:
1235118
Alternate ID(s):
OSTI ID: 1348360
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 35 Vol. 112; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
colossal magnetoresistance
high pressure
phase separation
strongly correlated materials
transport measurements