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

Title: Ordering in the dilute weakly anisotropic antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2}

Abstract

The highly diluted antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2} has been investigated by neutron scattering in zero field. The Bragg peaks observed below the Neel temperature (T{sub N}{approx_equal}10.9 K) indicate stable antiferromagnetic (AF) long-range ordering at low temperature. The critical behavior is compatible with random-exchange Ising model critical exponents ({nu}{approx_equal}0.69 and {gamma}{approx_equal}1.31), as reported for Mn{sub x}Zn{sub 1-x}F{sub 2} with higher x and for the isostructural compound Fe{sub x}Zn{sub 1-x}F{sub 2}. However, in addition to the Bragg peaks, unusual scattering behavior appears around the (1 0 0) AF Bragg peak below a glassy temperature T{sub g}{approx_equal}7.0 K. The glassy region T<T{sub g} corresponds to that of noticeable frequency dependence in earlier zero-field ac susceptibility measurements on this sample. These results indicate that long-range order coexists with short-range nonequilibrium clusters in this highly diluted magnet. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [2];  [3]
  1. Departamento de Fisica, Universidade Federal de Pernambuco, 50670-901 Recife PE, (Brazil)
  2. Department of Physics, University of California, Santa Cruz, California 95064 (United States)
  3. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (United States)
Publication Date:
OSTI Identifier:
20216577
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 61; Journal Issue: 21; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MANGANESE FLUORIDES; ZINC FLUORIDES; ANTIFERROMAGNETIC MATERIALS; ORDER PARAMETERS; NEUTRON DIFFRACTION; ISING MODEL; NEEL TEMPERATURE; MAGNETIC SUSCEPTIBILITY; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Montenegro, F. C., Belanger, D. P., Slanic, Z., and Fernandez-Baca, J. A. Ordering in the dilute weakly anisotropic antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2}. United States: N. p., 2000. Web. doi:10.1103/PhysRevB.61.14681.
Montenegro, F. C., Belanger, D. P., Slanic, Z., & Fernandez-Baca, J. A. Ordering in the dilute weakly anisotropic antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2}. United States. doi:10.1103/PhysRevB.61.14681.
Montenegro, F. C., Belanger, D. P., Slanic, Z., and Fernandez-Baca, J. A. Thu . "Ordering in the dilute weakly anisotropic antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2}". United States. doi:10.1103/PhysRevB.61.14681.
@article{osti_20216577,
title = {Ordering in the dilute weakly anisotropic antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2}},
author = {Montenegro, F. C. and Belanger, D. P. and Slanic, Z. and Fernandez-Baca, J. A.},
abstractNote = {The highly diluted antiferromagnet Mn{sub 0.35}Zn{sub 0.65}F{sub 2} has been investigated by neutron scattering in zero field. The Bragg peaks observed below the Neel temperature (T{sub N}{approx_equal}10.9 K) indicate stable antiferromagnetic (AF) long-range ordering at low temperature. The critical behavior is compatible with random-exchange Ising model critical exponents ({nu}{approx_equal}0.69 and {gamma}{approx_equal}1.31), as reported for Mn{sub x}Zn{sub 1-x}F{sub 2} with higher x and for the isostructural compound Fe{sub x}Zn{sub 1-x}F{sub 2}. However, in addition to the Bragg peaks, unusual scattering behavior appears around the (1 0 0) AF Bragg peak below a glassy temperature T{sub g}{approx_equal}7.0 K. The glassy region T<T{sub g} corresponds to that of noticeable frequency dependence in earlier zero-field ac susceptibility measurements on this sample. These results indicate that long-range order coexists with short-range nonequilibrium clusters in this highly diluted magnet. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevB.61.14681},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}