skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: X-ray scattering studies of charge stripes in manganites and nickelates

Abstract

Using synchrotron x-ray scattering on single crystals of Nd{sub 1/2}Sr{sub 1/2}MnO{sub 3} and La{sub 5/3}Sr{sub 1/3}NiO{sub 4}, we have demonstrated the existence of charge stripe structures in both compounds. In Nd{sub 1/2}Sr{sub 1/2}MnO{sub 3} charge ordered satellite reflections were located at positions (h/20l), h=odd and l=even. In addition we have also observed some weak reflections at other positions (h/2kl/2) and (h/20l/2), h and l=odd and k=1. The result is in accord with the CE-type antiferromagnetic structure as reported by neutron powder diffraction. The transition was observed to be at a transition temperature T{sub CO}{approx_equal}159 K and to be strongly first order in nature. By contrast, studies of La{sub 5/3}Sr{sub 1/3}NiO{sub 4} showed a second order transition at T{sub CO}{approx_equal}240 K. This produced charge stripe satellites with a wavevector q=(h{+-}2{epsilon}0l), h=even and l=odd. Critical exponents of the transition were obtained and show that the system is in the 2D universality class. The two dimensional nature of the charge stripes is clearly shown in their markedly different correlation lengths at low temperatures e.g., {xi}{sub a}{approx_equal}110 A, {xi}{sub b}{approx_equal}130 A, whist {xi}{sub c} is only about 17 A. These results demonstrate clearly that the charge stripes are themselves two dimensional in character.

Authors:
; ;  [1];  [2];  [3];  [4]
  1. Department of Physics, University of Durham, Durham DH1 3LE (United Kingdom)
  2. XMaS CRG, ESRF, 38043 Grenoble (France)
  3. Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974-0636 (United States)
  4. (United States)
Publication Date:
OSTI Identifier:
21208283
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 483; Journal Issue: 1; Conference: 1999 University of Miami conference on high temperature superconductivity, Coral Gables, FL (United States), 7-13 Jan 1999; Other Information: DOI: 10.1063/1.59649; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTIFERROMAGNETISM; CORRELATIONS; CRYSTAL STRUCTURE; HIGH-TC SUPERCONDUCTORS; LANTHANUM COMPOUNDS; LATTICE PARAMETERS; MANGANESE COMPOUNDS; MONOCRYSTALS; NEODYMIUM COMPOUNDS; NEUTRON DIFFRACTION; NICKELATES; STRONTIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE; X-RAY DIFFRACTION

Citation Formats

Du, C.-H., Su, Y., Hatton, P. D., Brown, S., Cheong, S.-W., and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854. X-ray scattering studies of charge stripes in manganites and nickelates. United States: N. p., 1999. Web. doi:10.1063/1.59649.
Du, C.-H., Su, Y., Hatton, P. D., Brown, S., Cheong, S.-W., & Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854. X-ray scattering studies of charge stripes in manganites and nickelates. United States. doi:10.1063/1.59649.
Du, C.-H., Su, Y., Hatton, P. D., Brown, S., Cheong, S.-W., and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854. Wed . "X-ray scattering studies of charge stripes in manganites and nickelates". United States. doi:10.1063/1.59649.
@article{osti_21208283,
title = {X-ray scattering studies of charge stripes in manganites and nickelates},
author = {Du, C.-H. and Su, Y. and Hatton, P. D. and Brown, S. and Cheong, S.-W. and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854},
abstractNote = {Using synchrotron x-ray scattering on single crystals of Nd{sub 1/2}Sr{sub 1/2}MnO{sub 3} and La{sub 5/3}Sr{sub 1/3}NiO{sub 4}, we have demonstrated the existence of charge stripe structures in both compounds. In Nd{sub 1/2}Sr{sub 1/2}MnO{sub 3} charge ordered satellite reflections were located at positions (h/20l), h=odd and l=even. In addition we have also observed some weak reflections at other positions (h/2kl/2) and (h/20l/2), h and l=odd and k=1. The result is in accord with the CE-type antiferromagnetic structure as reported by neutron powder diffraction. The transition was observed to be at a transition temperature T{sub CO}{approx_equal}159 K and to be strongly first order in nature. By contrast, studies of La{sub 5/3}Sr{sub 1/3}NiO{sub 4} showed a second order transition at T{sub CO}{approx_equal}240 K. This produced charge stripe satellites with a wavevector q=(h{+-}2{epsilon}0l), h=even and l=odd. Critical exponents of the transition were obtained and show that the system is in the 2D universality class. The two dimensional nature of the charge stripes is clearly shown in their markedly different correlation lengths at low temperatures e.g., {xi}{sub a}{approx_equal}110 A, {xi}{sub b}{approx_equal}130 A, whist {xi}{sub c} is only about 17 A. These results demonstrate clearly that the charge stripes are themselves two dimensional in character.},
doi = {10.1063/1.59649},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 483,
place = {United States},
year = {1999},
month = {9}
}