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Title: Understanding the Insulating Phase in Colossal Magnetoresistance Manganites: Shortening of the Jahn-Teller Long-Bond across the Phase Diagram of La{sub 1-x}Ca{sub x}MnO{sub 3}

Abstract

The detailed evolution of the magnitude of the local Jahn-Teller (JT) distortion in La{sub 1-x}Ca{sub x}MnO{sub 3} is obtained across the phase diagram for 0{<=}x{<=}0.5 from high-quality neutron diffraction data using the atomic pair distribution function method. A local JT distortion is observed in the insulating phase for all Ca concentrations studied. However, in contrast with earlier local structure studies, its magnitude is not constant, but decreases continuously with increasing Ca content. This observation is at odds with a simple small-polaron picture for the insulating state.

Authors:
; ; ;  [1]; ;  [2];  [3];  [4];  [5]
  1. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-2320 (United States)
  2. ISIS, CCLRC Rutherford Appleton Laboratory, Chilton-Didcot, OX11 0QX, Oxfordshire (United Kingdom)
  3. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  4. Institute Laue-Langevin, Boite Postale 156, 38042 Grenoble Cedex 9 (France)
  5. Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
20951196
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevLett.98.137203; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM COMPOUNDS; DISTRIBUTION FUNCTIONS; JAHN-TELLER EFFECT; LANTHANUM COMPOUNDS; MAGNETORESISTANCE; MANGANATES; NEUTRON DIFFRACTION; PHASE DIAGRAMS

Citation Formats

Bozin, E. S., De Coninck, A. J., Paglia, G., Billinge, S. J. L., Schmidt, M., Radaelli, P. G., Mitchell, J. F., Chatterji, T., and Proffen, Th. Understanding the Insulating Phase in Colossal Magnetoresistance Manganites: Shortening of the Jahn-Teller Long-Bond across the Phase Diagram of La{sub 1-x}Ca{sub x}MnO{sub 3}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.137203.
Bozin, E. S., De Coninck, A. J., Paglia, G., Billinge, S. J. L., Schmidt, M., Radaelli, P. G., Mitchell, J. F., Chatterji, T., & Proffen, Th. Understanding the Insulating Phase in Colossal Magnetoresistance Manganites: Shortening of the Jahn-Teller Long-Bond across the Phase Diagram of La{sub 1-x}Ca{sub x}MnO{sub 3}. United States. doi:10.1103/PHYSREVLETT.98.137203.
Bozin, E. S., De Coninck, A. J., Paglia, G., Billinge, S. J. L., Schmidt, M., Radaelli, P. G., Mitchell, J. F., Chatterji, T., and Proffen, Th. Fri . "Understanding the Insulating Phase in Colossal Magnetoresistance Manganites: Shortening of the Jahn-Teller Long-Bond across the Phase Diagram of La{sub 1-x}Ca{sub x}MnO{sub 3}". United States. doi:10.1103/PHYSREVLETT.98.137203.
@article{osti_20951196,
title = {Understanding the Insulating Phase in Colossal Magnetoresistance Manganites: Shortening of the Jahn-Teller Long-Bond across the Phase Diagram of La{sub 1-x}Ca{sub x}MnO{sub 3}},
author = {Bozin, E. S. and De Coninck, A. J. and Paglia, G. and Billinge, S. J. L. and Schmidt, M. and Radaelli, P. G. and Mitchell, J. F. and Chatterji, T. and Proffen, Th.},
abstractNote = {The detailed evolution of the magnitude of the local Jahn-Teller (JT) distortion in La{sub 1-x}Ca{sub x}MnO{sub 3} is obtained across the phase diagram for 0{<=}x{<=}0.5 from high-quality neutron diffraction data using the atomic pair distribution function method. A local JT distortion is observed in the insulating phase for all Ca concentrations studied. However, in contrast with earlier local structure studies, its magnitude is not constant, but decreases continuously with increasing Ca content. This observation is at odds with a simple small-polaron picture for the insulating state.},
doi = {10.1103/PHYSREVLETT.98.137203},
journal = {Physical Review Letters},
number = 13,
volume = 98,
place = {United States},
year = {Fri Mar 30 00:00:00 EDT 2007},
month = {Fri Mar 30 00:00:00 EDT 2007}
}