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Title: Magnetism and structural distortion in the La{sub 0.7}Sr{sub 0.3}MnO{sub 3} metallic ferromagnet

Abstract

Neutron scattering studies on a single crystal of the highly correlated electron system, La{sub 1{minus}{ital x}}Sr{sub {ital x}}MnO{sub 3} with {ital x}{approx_equal}0.3, have been carried out elucidating both the spin and lattice dynamics of this metallic ferromagnet. We report a large measured value of the spin wave stiffness constant, which directly shows that the electron transfer energy of the {ital d} band is large. The spin dynamics, including magnetic critical scattering, demonstrate that this material behaves similar to other typical metallic ferromagnets such as Fe or Ni. The crystal structure is rhombohedral, as previously reported, for all temperatures studied (below {approximately}425 K). We have observed superlattice peaks which show that the primary rhombohedral lattice distortion arises from oxygen octahedra rotations resulting in an {ital R}{bar 3}{ital c} structure. The superlattice reflection intensities, which are very sensitive to structural changes, are independent of temperature demonstrating that there is no primary lattice distortion anomaly at the magnetic transition temperature {ital T}{sub {ital C}}=378.1 K; however, there is a lattice contraction. {copyright} {ital 1996 The American Physical Society.}

Authors:
;  [1]; ;  [2]; ;  [3]
  1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  2. Department of Physics, Tohoku University, Sendai 980 (Japan)
  3. Joint Research Center for Atom Technology, Tsukuba, Ibaraki 305 (Japan)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
OSTI Identifier:
284385
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 53; Journal Issue: 21; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM OXIDES; MAGNETIC PROPERTIES; STRONTIUM OXIDES; MANGANESE OXIDES; CRYSTAL STRUCTURE; NEUTRON DIFFRACTION; SPIN WAVES; FERROMAGNETIC MATERIALS; ELECTRON TRANSFER

Citation Formats

Martin, M C, Shirane, G, Endoh, Y, Hirota, K, Moritomo, Y, Tokura, Y, and Department of Applied Physics, University of Tokyo, Tokyo 113. Magnetism and structural distortion in the La{sub 0.7}Sr{sub 0.3}MnO{sub 3} metallic ferromagnet. United States: N. p., 1996. Web. doi:10.1103/PhysRevB.53.14285.
Martin, M C, Shirane, G, Endoh, Y, Hirota, K, Moritomo, Y, Tokura, Y, & Department of Applied Physics, University of Tokyo, Tokyo 113. Magnetism and structural distortion in the La{sub 0.7}Sr{sub 0.3}MnO{sub 3} metallic ferromagnet. United States. https://doi.org/10.1103/PhysRevB.53.14285
Martin, M C, Shirane, G, Endoh, Y, Hirota, K, Moritomo, Y, Tokura, Y, and Department of Applied Physics, University of Tokyo, Tokyo 113. 1996. "Magnetism and structural distortion in the La{sub 0.7}Sr{sub 0.3}MnO{sub 3} metallic ferromagnet". United States. https://doi.org/10.1103/PhysRevB.53.14285.
@article{osti_284385,
title = {Magnetism and structural distortion in the La{sub 0.7}Sr{sub 0.3}MnO{sub 3} metallic ferromagnet},
author = {Martin, M C and Shirane, G and Endoh, Y and Hirota, K and Moritomo, Y and Tokura, Y and Department of Applied Physics, University of Tokyo, Tokyo 113},
abstractNote = {Neutron scattering studies on a single crystal of the highly correlated electron system, La{sub 1{minus}{ital x}}Sr{sub {ital x}}MnO{sub 3} with {ital x}{approx_equal}0.3, have been carried out elucidating both the spin and lattice dynamics of this metallic ferromagnet. We report a large measured value of the spin wave stiffness constant, which directly shows that the electron transfer energy of the {ital d} band is large. The spin dynamics, including magnetic critical scattering, demonstrate that this material behaves similar to other typical metallic ferromagnets such as Fe or Ni. The crystal structure is rhombohedral, as previously reported, for all temperatures studied (below {approximately}425 K). We have observed superlattice peaks which show that the primary rhombohedral lattice distortion arises from oxygen octahedra rotations resulting in an {ital R}{bar 3}{ital c} structure. The superlattice reflection intensities, which are very sensitive to structural changes, are independent of temperature demonstrating that there is no primary lattice distortion anomaly at the magnetic transition temperature {ital T}{sub {ital C}}=378.1 K; however, there is a lattice contraction. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.53.14285},
url = {https://www.osti.gov/biblio/284385}, journal = {Physical Review, B: Condensed Matter},
number = 21,
volume = 53,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 1996},
month = {Sat Jun 01 00:00:00 EDT 1996}
}